29
TAXONOMY OF RUST CAUSING FUNGI The rust causing species belonging to a number of genera are arranged alphabetically and are appended with brief diagnostic descriptions. A. AECIDIUM 1. Aecidium spp: Host : Berberis lycium Aecia aecidiod, chiefly hypophyllous, yellowish (X. or orange, peridiate, peridial cells angular, hyline A 27-39 x 15 - 24 /a, inner wall verrucose, 3 to 4 ju thick, outer wall 6-75 yU thick, aeciospores oblong or angularly globoid, yellowish orange, 18-30 x 15-21 ja thick verrucose, wall uniformly 1.5 ja thick. Loc, Harwan Kashmir. No: K8 3*6 Date of collection ^-5*- 85 Fig: X 2. Aecidium pseudoumbellata; sp. nov. Host: Berberis pseudoumbellata Aecia on adaxial side of leaf, crowded in groups, each group 3-4 mm across, erumpent, aecia peridiate, peridial cells angular, aeciospores yellowish orange, produced in chains, angularly globoid, 21-24 x 14-20 ja wall uniformly 1.5-3 ja thick. Loc, Harwan Kashmir. No: K83I8 Date of collection Fig: H

K8 3*6 85 X - INFLIBNET Centreshodhganga.inflibnet.ac.in/bitstream/10603/33312/7/07_chapter 2.pdf · ( DC ) Cumms. Mycotaxon 5,402. 1977 Syn. Puccinia centaurea Dc. Flora. Fr. 5,59.191

  • Upload
    others

  • View
    1

  • Download
    0

Embed Size (px)

Citation preview

  • TAXONOMY OF RUST CAUSING FUNGI

    The rust causing species belonging to a number

    of genera are arranged a lp h ab etically and are appended

    with b r ie f d iagnostic d esc r ip tio n s .

    A . AECIDIUM

    1 . Aecidium spp: Host : Berberis lycium

    A ecia aec id io d , c h ie fly hypophyllous, yellow ish

    (X.or orange, p e r id ia te , p e r id ia l c e lls angular, hyline

    A

    27-39 x 15 - 24 /a , inner wall verrucose, 3 to 4 ju

    thick, outer wall 6-75 yU th ick , aeciospores oblong

    or angularly globoid , ye llow ish orange, 18-30 x

    15-21 ja th ic k verrucose, wall uniform ly 1 .5 ja th ick .

    Loc, Harwan Kashm ir. No : K8 3*6

    Date of co lle c tio n ^-5*-85 F ig : X

    2 . Aecidium pseudoum bellata; sp . nov.

    H ost: Berberis pseudoumbellata

    A ecia on adaxial side o f le a f , crowded in

    groups, each group 3-4 mm across, erumpent, aecia

    p e r id ia te , p e r id ia l c e lls angular, aeciospores

    yellowish orange, produced in chains , angularly

    globoid, 21-24 x 14-20 ja wall uniform ly 1.5- 3 ja

    thick .

    Loc, Harwan Kashm ir. No: K 8 3 I 8

    Date of co llectio n F ig : H

  • Aeciospores of BerberIs lyciuc

    Aeciospores of Berbris pseudoumbellat^

  • #

    imF IG I

    \

    * # #

    &

  • 1J

    B - PHRAGMIDIUM

    3 . Phraqmidium b u tle r i Syd. Ann. Mycol

    7 ,5 0 1 , 1907 o

    H ost: On the l iv in g leaves of Rosa

    macrophylla

    U red in ia and t e l ia are present.

    U red in ia hypophyllous, orange, minute,

    scattered and paraphysate ( paraphyses numerous,

    h y alin e , c lavate , curved, 50 u long, 12-16 ja b r o a d ) .

    Urediniospores globose sub globoae or e l l ip s o id ,

    18-24 x 10-14 wall l- l05yu thick m inutely verrucose,

    germ pores 5-7 scattered in d is t r ib u t io n .

    T e lia hypophyllous, spots minute, sparse

    black , teliospores c y l in d r ic a l , 5-7 septate , commonly

    6 or 7 not constricted at the seption , 60-74 x 21-26j a

    wall chestnut brown, 3 to 4 / i th ick , A pical p a p illa

    present, ped ical hyaline or pale yellow p ersistant

    up to 55-70 yli long .

    Loc, Harwan Kashmir,, Pi No: 2

    Date o f co lle c tio n 85 F ig : I

    4 . Phraqmidium rubi Pers„ VJint* Rabh. krypt.

    F t . ed 2 (7) 2 3 0 o 1884

    Host: On the l iv in g leaves o f Rubus

    u lm ifo l iu s .

    U red in ia l and t e l ia l stages are

    p resen t .

  • Fig I , . . . . , .Teliospores of Phragmldimn feutleri

    Fig I I , . . . . .Teliospores of Phrag rubl

    Fig III*....Teliospores of Phrag rosae cf moschatr

    Plate 2

  • FIG I

    V

    FIGI]

    FIGIfl

  • I-1.

    U red in ia hypophyllous/ scattered yellow ,

    minute, paraphysate urediniospores globoid or

    e ll ip s o id , 13-19 x 10-13 u, wall 1-1.5 u th ick ,

    hyaline pale yellow , sparsely echinulate germ

    pores 2-40

    T e lia hypophyllous scattered brow nish ,

    pulverulent, teliospores c y lin d er ic e , usu ally 6

    celled , not constricted , rounded above with a

    hyaline p a p illa upto 12 u , 60-75 x 24-30 u, wall

    cinnamon brown or pale yellow 5-7 u th ick , coarsely

    warted 2-4 germ pores in each c e l l , ped icel p ersisten t

    upto 150 u lo n g c

    Loc, Harwan Kashm ir. 91 No: Z

    Date o f c o lle c tio n . F i g : H

    5 . Phraqrnidium rosae cf moschatae Dieto Hedwigia

    44 , 126-132, 1

    1905 o

    H ost: On the l iv in g leaves of Rosa inoschata

    Uredial and t e lia l stages present.

    U red in ia hypophyllous, sparse, spots minute,

    yellow and paraphysate h y aline , curved, c lavately

    cy lin d r ic a l 30-45 x 10-16yi» Urediniospores globose,

    sub globose or e l l ip s o id , 20-25 x 11-16 j a , wall

    pale yellow 1-1.3 ja th ick , minutely verrucose germ

    pores 5-8, scattered in d istr ib u tio n *

    T e lia hypophyllous, sparse, minute black

    teliospores c y lin d r ica l 70-110 x 24-33yu, 5-9 septate

  • usually 7septa not constricted a t 'th e septum,

    rounded at the base, wall 4-5 u thick Orange

    brown, densely verrucose, apex p a p illa t e , h y alin e ,

    5-11 u, pedical hyaline or s lig h tly coloured and

    p ersid tant .

    Loc, Harwan Kashmir. Pi Ko: 2.

    Date of c o lle c tio n . ^-S'g5' F i g :I H

    (C) PUCCINIA

    O j6 . Puccinia calcitrap ae v a r . centuraceae

    .......... .. 1 ......... 1 ■ 1 1 * ■— .......A 1,1 1 , 1

    ( DC ) Cumms. Mycotaxon 5 ,4 0 2 . 1977

    Syn . Puccinia centaurea D c . F lo ra . F r . 5 ,5 9 .1 9 1

    H ost: On the liv in g leaves of Centaurea spp.

    U redinia and t e l ia are present,

    Uredinia amphigenous, cinnamon brown, urediniospores

    24-27 x 21-24 j a , broadly obovoid, or e l l ip s o id , wall

    1.5_yu thick at the hilum , 3 05 u thick , golden brown,

    achinulate , except for a small zone above the hilum ,

    germ pores ( 2- ) 3 ( -4 ) equatorial in d is t r i

    butio n .

    T e l ia amphigenous, exposed b lack ish brown

    pulverulent, teliospores ( 24- ) 30-42 ( -45) x

    18-24 ( -27 ) j a mostly e ll ip s o id , wall verrucose,

    pore of the upper cell apical and lower cell

    depressed. Pedical colourless upto 54y a but

    generally broken at hilum 0

    Loc, Harwan Kashmir. pj£ N o ;3

    Date of c o lle c tio n . 6 - ~7 B S F i g :I

  • Pig I , ............... Teliospores of Puccinla cent jure aFig I I . . ............Teliospores of Puccinla coronata

    Pig I I I , ............Teliospores of Puccinla menthae

    Pig IV,........ . .Ure&ospores of Puccinla polygon! 1Pig V ................Teliospores of Puccinla tanacetlFig VI,............Teliospores of Puccinla vlolaeFig V I I , T e l i o s p o r e s of Pucclnia watt Lana

    Plate 3

  • f ig vf i g iv

    FIG VI

    FIG V I I

  • 7 . Puccin ia coronata Corda. Icon , Fung 6 , 1 837 ,

    Syn . Puccin ia l o l i i N e ils 1875

    H o st : S tip g , spp

    U redinia and T e lia are seen .

    U redinia amphigenous, yellow or cinnamon brown,

    Uredospores broadly e l l ip s o id 18-23 x 22-26yU. Wall

    pale cinnamon brown 1- 1 .5 j a th ick , f in e ly echinulate ,

    pores 4-6, scattered .

    T e l ia amphigenous, chestnut brown. Teliospores

    e llip s o id or oblong 18-24 x 30-36yu rounded or somewhat

    narrowed at each end and constricted at septum, wall

    chestnut brown l- le5 th ick at sides 2-4 ja th ick

    a p ic a lly . Pedicel co lo urless , same or twice the

    length of spore.

    Loc, Dachigam Kashm ir: Q l No: 3

    Date o f collection ,, 5"-T 86 Fig dL

    8 . Puccin ia menthae Pers . SydQ Moth. Fung.

    227 . 1801

    Host: Origanum vulqare

    U redinia and t e l ia are p resen t .

    Uredosori hypophyllous, round and cinnamon, uredospores

    e llip s o id 20-25 x 12- 17 j x , wall 1.5-2 j a th ic k , echinulate

    with 3 equatorial germ p o res .

    Teleutosori are dark when compared with uredosori

    Teleutospores sub globoid to obgloboid, rounded at both

    ends dark brown 26-32 x 19-23 ja , wall smooth 1.5-2yu thick#

  • septa usually s lig h tly constricted , pore

    of upper c e ll a p ical, of lower cell close to

    the septum, p a p illa broad and h y a lin e . Pedicel

    hyaline slender and f r a g i l e , -

    Loc, Pahalgam Kashm ir,

    Date of co llectio n l5’,'7- 8&

    91 No: 3

    Fig;HIl

    9© Puccin ia polyqoni Alb & Schw,

    H o st : Polygonum am plexicaule

    Only uredin ia seen ,

    Uredosori mostly hypophyllous, scattered , rounded

    pulverulent, brownish, uredospores mostly globoid ,

    but sometimes e llip s o id or obovoid 17-30 x 15-22j a ,

    wall d is t in c t ly ech inu late , 1- 1,5yu th ick , pale

    yellow to brown with 2 or sometimes 3 supra

    equatorial po res ,

    Loc, Duksum Anantnag, Pi No; 3

    Date of co llectio n I8 -T86 F ig :I2

    1 0 , Puccin ia tanceti DC , F I , Fr» 2 , 2 22 , 1805

    S y n . Puccinia a b s in th ii DC, Lam, E n cyl, Meth,

    Bot, 8 , 245 ( 1808 )

    Puccinia a r t e m is ie lla . P & H„ Sydow, Manogr.

    Ured 7, 1 4 , ( 1902 )

  • Uredo a b s in th ii ( Hedwf ) DC, F I . F r 0 5 , 56 ( 1815)

    H o st : Artem esia absinthium

    Uredosori and te lio so r i present,,

    Uredosori hypophyllous, cinnamon brown, and

    scattered , Uredospores e l l ip s o id , 24-30 x 20-22jol,

    wall l c5-2ya thick echinu iate with 3 equatorial

    pores.

    Teleutosori also hypophyllous but black

    and sp arse , Teleutospores e ll ip s o id , septa

    generally co n stricted . P a p illa te ap ical p a p illa

    broad ( 38- ) 40-46 ( -52 ) x ( 16- ) 20-24

    ( -26 ) _yu, wall 2-3yd t h ic k . Pedical p e r ista n t ,

    hyaline up to 60 u long and 10 jo . th ick ,

    Loc, Baramulla Kashm ir. pfi.No:3

    Date of co llectio n IO-1-85- Fig:"SZ

    Puccin ia v io lae ( Schum ) DC. F I . F r , 6 ,6 2 1 8 1 5 ,

    Syn Puccin ia alqra Grove 1883

    Puccin ia densa DC ( S .H ) 1897

    Puccin ia depaoperans ( V ize ) Syd 1903

    Acedium v io lae Schum 1803 ,

    Acedium depauperals V ize 1876

    Dicaeoma v io lae Ktze 1898 .

    Uredo violae Schum 1803

    H ost: V io la spp

    U red in ia and t e l ia are presen t.

  • Uredospores c h ie fly hypophyllous, pulverulent ,

    minute and scattered* Uredospores globoid to

    e ll ip s o id , 22-28 x 18-23 / 1, wall cinnamon brown,

    1 . 5 -2 / i th ick , echinulate pores 2, equato rial*

    Teleuto so ri hypophyllous, pulverulent,

    minute rounded and dark brown0 Teleutospores

    e llip s o id or oblong, generally rounded at each

    end but occassio nally s lig h t ly attenuated at

    the b ase , 22-36 x 17-23 / jl, s ligh t or no cons trico t ion

    at the septum, wall chestnut brown, fa in t ly

    verrucose, 1 .5 to 2 * 5 j a th ick with hyaline p a p il la .

    Pore of the c e ll is a p ic a l , while the pore of

    lower c e ll is at the septum. Pedicel colourless

    short and fra g ile *

    Loc, Dachigam Kashm ir. pjl N o :"3

    Date of co llectio n 86 Fig I’VE

    12* Puccinia w attiana B arclay . J . A s ia t ic

    So c . Bengal 58 , 109* 1890

    H o st : Clematis spp*

    U red in ia and t e l ia are p resen t .

    U redinia generally amphigenous, sometimes

    hypophyllous, round and sparse 0 Uredospore

    globose to e ll ip e o id , 21-24 x 19-23j x cinnamon

    brown 1 .5- 3 j a th ick germ pores obscure0

    The t e l ia are also amphigenous, black

    and sori occur in groups. Teliospores oblong,

    s lig h tly constricted at the septum, 36_44 x 20-24 j a ,

  • wall 2-4yu th ick , smooth cinnamon brown#

    p a p illa at the apex broad, single pore seen

    in each c e l l .

    Loc, Dachigam Kashm ir. N o j^

    Date of co llectio n FigsSL

    (D) UROMYCES

    1 3 . Uromyces euphorbiae Cke and Pk in Peck

    A nn . Rept.

    M . Y State Mus. 25, 90 1 8 7 3 ,

    Syn . Uredo proemineus DC. F I . F r . 2, 235 . 1805

    Uredo proemineus Pass in Rebh« F un gi.

    Euv. Exsic

    ( Ed Nov ) No . 1795- 1875)

    ( T e lia not described )

    Hosts On Euphorbia spp.

    U redin ial and t e lia l stages are seen .

    U redinia amphigenous, cinnamon brown. Urediniospores

    globoid 15-21 x 18-24yU . W all pale golden brown

    1.5- 2y a th ick ech inu late , germ pores 3-6, scattered

    in d is t r ib u t io n .

    T e l ia amphigenous, cinnamon brown, teliospore

    e l l ip s o id , 1»5-21 x 18-27, wall cinnamon brown,

    uniform ly 1-5y a thick m inutely verrucose with a

    hyaline p a p illa at the apex, pedical short hyaline

    and f r a g i l e .

    Loc, Gulmarg Kashmir. PJLNo j M

    Date o f co llectio n 15“- 6 - 8 7 F ig :T

  • Pig I • .Teliospores of Uromyces euphorbia*

    Fig I I . ............ Teliospores of Uromyces aexlcanus

  • FIG I I

  • 1 4 0 Uromyces mexicanus D ie ls Holw in Holway„

    Bot. Gaz„ 24 1897»

    H ost: Demodium eleqans

    U redinia amphigenous, pale cinnamon brown and

    scattered . Urediospores 18-22 x 15-18yU, mostly

    broadly e l l ip s o id wall l- le5 j i th ic k . uniform ly

    echinulate# pores 2 or 3 eq u a to ria l„

    T e lia dark brown exposed. Teliospores

    24-28 x 17-20yu wall 1-5-2 ju th ick at s id e s ,

    3-4 yU a p ic a lly chestnut brown and smooth,

    pedical hyaline -20-25yu in lenght*

    Loc, Dachigam Kashm ir„ Pfi. No:^J

    Date of co llectio n I0) !- 86 F i g i H

  • Discussion

    The b asic terminology for the spore states

    of rust fungi was proposed by Tulsane de~ Bary,

    Arthur ( 1905 , 1925 ) Cunnigham ( 1930 ) , Cummins ( 1959 )

    Hiratsuka ( 1973 ) , Laundon ( 1967 , 72 ) and Sav ile ( 1968 )

    The two systems of taxonomical descriptions normally

    used to id e n tify the various spore forms ares (a) the

    morphological system ; and (b) the ontogenic system.

    In the morphological system ( Laundon 1967 ) the

    morphology of spores whereas in the entogenic system

    ( Cummins, 1959 ; H iratsuka 1973b , 1975 ) the po sitio n

    of spore states in the l i f e cycle of fungi are the

    basis for d escrib in g various ta x a .

    In the present study Laundon 's system ( 1967 )

    emphasizing the use of morphological characters has

    been used, as the b a s is for describin g the various

    species collected so fa r .

    In In d ia Payak ( 1963 , 1965 ) has reported

    aecia on three species of Berberis ( B . a r i s t i t a 0 DC,

    B. .jaeschkeana C .K , Schw and B . lycium Royle ) ,

    from the western Himalaya p a rt ic u la rly from the Lahaul

    valley and Narkhanda ( a l t . 2800 m ) in S im la .

    According to Cummins and Greene ( 1966 ) m ajority

    of the rusts p a ra s it iz in g on the members of fam ily

  • 1

    Festucodeae produce aecia on d iffe r e n t species of

    Berberis i . e . P uccin ia brachypodii Otth v a r c brachypodii

    produce aecia on B , v u lq a ris , B a ristata and B lycium .

    Payak ( 1965 ) however is doubtful about the occurrance

    of B .vulgaris in Western Him alaya. 0 C ultural work

    done by him has proved that aecia produce^on Berberis lycium

    are related to P . brachypodii var b rach y p o dii.

    Bilqram i et al ( 1979 ) have recorded aecia

    ( four species ) on various species of berberis in

    India on the b as is of culture work carried out by

    Payak ( 1965 ) .

    Berberis lycium and B . a r is ta ta on which aecia

    are* very commonly produced have been considered as

    alternate hosts for Puccin ia brachypodii a rust on

    Brachypodium sylvaticum by Bilgram i et al ( 1979 ) #

    Sim ilarly aecidium on Berberis jaeschkeana have been

    shown to belong to Puccinia poae nem oralis. Thus

    out of four species of a e c id ia , on various species

    of Berberis only two have been correlated w ith P u c c in ia .

    So far aecia on Berberis pseudoum bellata have not

    been collected and as such i t is considered as an

    anamorjjh, t i l l its primary host is ascertained by

    carrying out culture work.

    The rust in fected specimen of Phraqmidium b u tle r i

    was collected by Inayat ( 1907 ) from Kumaon Him alaya.

  • E arlier D ie e ls ( 1905 ) had described Phraqmidium rosae

    moschata based on a specimen sent to him by B u tle r .

    In the u red in ia l characters both resemble each other

    but teliospore characters show d if fe r e n t ia t io n .

    The teliospores are longer in P . rosae moschatae

    and the wall colour is paler when compared to that of

    P . b u t le r i . P„ rubi is an autoecius macrocyclic

    rust fungus. A ll phragmidium species are autoecious

    and occur on species of the Rosaceae.

    Puccin ia comprises the larg est genus of rusts

    occuring on many fam ilies of angiosperms worldwide,

    and m ajority of important p lant d iseases are caused

    by species of this genus«

    The rust on Centaurea, P B calcitrapae was f ir s t

    reported as occurring in In d ia by Sydows ( 1912 )„

    Their id e n t if ic a t io n was based on a specimen collected

    by Butler from Harwan, Kashm ir, S in ce^th is rust has not

    been reported from other parts of India,, According

    to Cummins ( 1979 ) , the author of P . centaurea is

    Augustin pyramus de-Condolle ( DC ) and not H e inrich

    Von M arlius ( Marrt )» In add itio n to the s lig h t

    variation in the s ize of spore forms of P . centaurea

    it does not warrant the ju s t if ic a t io n of species and

    as such Cummins treated it as a variety of P . c a lc itr a p a e .

  • Puccini a coronata in fects Stip a spp.

    According to Bilgram i et al ( 1979 ) the uredo and

    t e l ia l stages on the leaves of Stip a spp. had

    been collected from Mussorie ( U . P . ) in 1 91 1 .

    Cummins ( 1979 ) stated that d iffe r e n t species of

    Puccin ia in fe c t various species of S tip a and

    Arthur recognised ju s t three species of Puccin ia

    in fe c t in g S t ip a . Presently P . coronata on Stipa

    has been co lle cted from Dachigam .

    P uccin ia menthae co llected from Pahalgam,

    Kashmir on Origanum vulqare is an autoecious

    m acrocyclic rust fungus. Guchet ( 1906 ) as a

    result of h is experiments considered the form on

    Origanum as b io lo g ic a lly d is t in c t as the spores

    were capable of in fe c t in g the same species only

    and fa ile d to in fe c t other three species of M entha.

    Puccin ia polyqonii on Polygonum am plexicaule

    is a heteroecious macrocyclic rust fungs with the

    spermogonial and aecial stages produced on Geranium

    spp0 The stages on Geranium have been collected

    from Kupwara Kashm ir.

    The rusts on Artem esia and Chrysanthemum were

    un ited generally under a s ingle species by e a r lie r

    w riters like Plowright due to the lack of c le a r

    morphological d iffe ren ces between them,. Later

  • Fischer , Sydows, Grove, W ilso n , Bisby and

    others separated them into two d is t in c t species

    P . a b s in th ii on Artem *sia and P . chrysanthem ii

    on Chrysanthemum.

    Treboux ( 1912 ) found that P . tanaceti

    may overwinter on Artem esia maritima by mean of

    uredosporeso In the present study P . tanaceti

    was found to overwinter in the t e l ia l stage on

    Artemesia absinthium*

    The rust Puccinia v io la e on the leaves of

    V io la is known from Sim la ( H„ P . ) , and MUssori

    ( U . P . ) and Ranipheit ( Kumaon Himalaya ) on

    V io la serpentis Sydow and Butler ( 1907 )*

    Barclay ( 1890 ) f ir s t described P„ w attiana

    on Clematis qouriana Roxbe Later Sydow and

    Butler ( 1906 ) reported the same species from

    Dehradoon. P a til and Thirum alachar ( 1971 )

    reported the same on a new host Clem atis tr ilo b a

    from N asik and presently this has been collected

    from Dachigam.

    Uromyces comprises the second largest

    genus of rusts ( about 600 species ) and occurs

    worldwide on a wide variety of angiosperm h o sts .

    The pathogenic genra in fe c t mostly members of

    Gramineae, Leguminosae and Com positae. Uromyces

  • d iffe rs from Puccin ia in having u n ice lle d teliospores

    Uromyces euphorbiae is an autoecious

    macrocyclic rust fungus. Arthur ( 1934 ) based

    eon culture work recognised four v a r it ie s in i t .

    Uromyces mexicanus on Desmodium eleqans

    has not been reported from In d ia . Cummins

    recorded the species p a ra s itic on various species

    of Desmodium,, They are (a) Uremyces antiquanus

    (b) Uromyces hedysari p a n ic u la ti (c) Uromyces

    mexicanus (d) Uromyces te n u is t ip e s .

    The u red in ia l and t e l ia l stages of Uromyces

    euphorbiae and Uromyces mexicanus collected in

    Kashmir from d if fe r e n t places almost resemble

    each other.

  • le v to t h e species of Acedlum

    Acoia chiefly hypophyllous, yellowish orange ;

    Acclospores oblong or angularly globoid ;

    18-30 x 15 - 2 V i ; wall 1 thick A«lycium

    Aecia chiefly on adaxial surface, crowded in

    groups ; Acciospores angularly globoid ;

    21-24/ i x 14 - 20yu ; wall upto 3j a thick.

    A«Pseudoumbe-lla*a

  • 1t urediniospores globoid or ellipsoid ;

    fJaraphysis numerous, clavate,

    2 0 - 3 0 x 10yU ; germ pores 2-4* P.rubi

    oUredlnispores globose to subglobose or

    A

    ellipsoid ; paraphysis hyaline, clavate,

    30-50yu x 10-16 yu germ pores 5-8.

    2. Teliospores cylindrical, usually 6-celled

    constricted, 60-75 x 24-30j x , with 2-4

    pores per cell# Pwbutleri.

    tov to the speoies of Phragmidium

    Teliospores cylinderical, 7-septate, 70-110 x

    24- 32/ x ; germ pores absent.

    £• rosae cf moschata

  • 1« Uredosori hypophyllous, rounded, cinnamon

    brown, scattered.

    Uredospores mostly globoid or obov/oid ;

    17-30 u x 15-22yU , wall 1-1,5>u with 2 or

    3 equatorial germ pores P. Folygoni

    2. Uredospores ellipsoid or globoid ;

    20-30 u x 12 -23yU , wall 1. 5-2 ■ with 2-3

    equatorial germ pores*

    3, Teleutosori Papillate, hypo)>hyllous

    Uredospores with 3 germ pores ;

    Teleutosori black, sparse; 40-46ja x 20-24j i

    wall 2-ĵ * ; apical papilla broad,

    P. tanaceti

    uredospores with 2 germ pores ;

    Teleutosori dark brown, 30-42yU x 18 -24yu,

    wall 3 ,5 yU ; papilla hyaline, P ,Violace

    Teleutosori non-papiliate, ellipsoid,

    26-3Z ja x 19-23yu» wall 1,5-2yU j uredospores

    with 3 germ pores, P,>«enthae

    Uredosori anphigenous, globose to^ovoid

    or ellipsoid, yellow or cinnamon browa. ,

    Teleutosori papillate, ; Uredospores

    globose to ellipsoid ; 21-29yu x 19-22^ai,

    wall 1 ,5 - 3 ' J 1 » germ pores obscure.

    P .wattiana

    Key to the species of Puccinia

    28

  • Teleutosori non papillate*

    Uredospores broadly obovoid or ellipsoid ;

    24-27yU x 21 -24ja ; wall 1.5-3.5yU with

    2-3 (-4) germ pores. P . calcitrapae

    Uredospores broadly ellipsoid ; 18 -23 u x 22 -

    26yu , wall 1-1*5yU with 4 -6 scattered

    germ pores. P.coronata

    29

  • Kev to the species of Uromyces

    Uredospores globoid pale golden brown ;

    15-21 x 18 - 2k ja ; wall verrucose with

    3-6 scattered pores u .euphorbiae

    Uredospores ellipsoid, echinulate,

    18-22 x 15-18/U ; wall uniformly echinulate

    with 2-3 equatorial pores, U«anexicanus

    30