Part 3, 1912] ABCIDIACBAE 211 



Distribution : Along the Gulf coast from Mississippi to Florida, and in the Bermuda and 

 Bahama Islands. 



Illustrations: Bot. Gaz. 49 : ;>;. 2i,/. 7; Bull. N. Y. Bot. Gard. 7 : 4^75, /.S6; pl.lSJ,/.4J. 

 ExsiCCATi : Seym. & Earle, Econ. Fungi 249, 250. 



27. ERIOSPORANGIUM Bertero ; L6v. Ann. Sci. Nat. 



III. 5 : 269. 1846. 



Argotelium Arth. Result. Sci. Congr. Bot. Vienne 343, excl. descr. 1906. 



Cycle of development includes pycnia, aecia, uredinia, and telia, with distinct alternat- 

 ing phases; autoecious. All sori subepidermal. 



Pycnia globoid or flask-shaped, with ostiolar filaments. 



Aecia erumpent, inclined to be indefinite, either without peridium, or with a loose and 

 fragile peridium. Aeciospores catenulate, varying from globoid to fusiform; wall color- 

 less, verrucose, usually peridermioid. 



Uredinia erumpent, definite, without paraphyses. Urediniospores borne singly on 

 pedicels, globoid or ellipsoid; wall pale yellowish-brown, concolorous, echinulate. 



Telia usually definite, without paraphyses. Teliospores two-celled, usually germinat- 

 ing in situ upon maturity ; wall usually pale or colorless, and generally smooth. 



Type species, Eriosporangiw^n Baccharidis (I/6v.) Bert, (on Baccharis montevidensis) , 



Host belonging to family Lamiaceae. 



Aecial peridium absent ; teliospores long, over 45 //. 



Aecia in restricted groups. 1. E. Hyptidis. 



Aecia scattered over whole plant. 2. E. fidelis. 



Aecial peridium present ; teliospores short, under 35//. 3. E. tucumanense. 



Host belonging to family Carduaceae. 



Aecia present and exclusively considered. 



Peridium absent ; aecia more or less indefinite. 



Aecia causing hypertrophy, aeciospores evenly verrucose. 4. -£". evadens. 

 Aecia causing no hypertrophy. 



Striations of aeciospores formed by small beads. 5. E. punciato-siriaium . 



Striations of aeciospores formed by elongate warts. 6. E. exoryiatum. 



Peridium presebt ; aecia definite. 



Aecia grouped, from a limited mycelium. 7. E. oaxacanum. 



Aecia scattered, from a diffuse mycelium. 11. E, egregiuni. 



Uredinia and telia present and exclusively considered. 

 Teliospores smooth. 



Teliospores large, over 50^ long. 



Pedicels slender. 4. E. evadens. 



Pedicels inflated. 5. E. punciatO'Striaium^ 



Teliospores small, under 50// long. 



Telia velvety, often cinereous by germination. 

 Wall of teliospore thin, under 2 /t. 



Telia low, applanate. 6. E. exornatum. 



Telia prominent, pulvinate. 7. E. oaxacanum. 



Wall of teliospore thick, over 2/(. 8. E. sphenicum. 



Telia smooth and usually polished. 9. E. pistoricum. 



Teliospores minutely verrucose or punctate. 



Wall of teliospore with thin concolorous umbo. 10. E. Baccharidis-hiriellae. 



Wall of teliospore with thick pale umbo. 11. E. egregiuni. 



1. Eriosporangium Hyptidis (M. A. Curt.) Arthur. 



Uredo Hyptidis M. A. Curt. Am. Jour. Sci. II. 6 : 353. 1848, 

 Puccinia Hyptidis Tracy & Earle, Bull. Miss. Exp. Sta. 34 : 86. 1895. 

 Gymnoconia Hyptidis Lagerh. Tromso Mus. Aarsh. 17: 83. 1895. 

 Argotelium Hyptidis Arth. Result. Sci. Congr. Bot. Vienne 343. 1906. 



0. Pycnia amphigenous, few in small groups on discolored spots, inconspicuous, flask- 

 shaped, barely protruding above surface of leaf, 110-140 /i broad by 160 175m high. 



1. Aecia amphigenous, surrounding- the pycnia, few in rounded or elongate groups 

 2-5 mm. across, along the' nerves, on somewhat larger reddish spots, round or oval, bullate, 

 0.5-1 mm. across, somewhat tardily dehiscent by irregular slits, orange-colored fading to dirty- 

 white, overarching epidermis reddish and prominent; peridium wanting; aeciospores 

 globoid, 26-32 by 29-33//, mostly 28-30// in diameter; wall nearly or quite colorless., 

 appearing very thick, 2.5-3//, closely and coarsely verrucose. 



II. Uredinia hypophyllous, scattered, round, 0.2-0.5 mm. across, soon naked, dark 

 cinnamon-brown, pulverulent, ruptured epidermis inconspicuous ; urediniospores globoid, 



