Part 4, 1920] AECIDIACEAE 
Telia smooth and usually polished. 
Telia velvety, often cinereous by germination. 
Teliospore-wall thick, more than 2 B. 
Teliospore-wall thin, less than 2 Be. 
Telia low, applanate. 
: Telia prominent, pulvinate. * 
Teliospores minutely verrucose or punctate, 
Teliospores with thin concolorous umbo. 
_  Teliospores with pale umbo. ; 
Teliospore-wal! chestnut- or chocolate-brown. 
Teliospore-wall smooth. 
Teliospore-wall not more than 7 B thick above. 
Teliospores narrow, usually less than 24 » broad. 
Teliospores wider, usually more than 24 u broad. 
Urediniospore-pores 3 (rarely 2 or 4), with bullate 
swelling over pores. 
Urediniospore-pores 2, without noticeable swell- 
ing over pores. 
Urediniospores noticeably flattened laterally, 
the pores extra-equatorial. 
Urediniospores -not noticeably flattened, the 
pores equatorial. 
Telia early naked. 
Telia long covered by epidermis. 
Teliospore-wall more than 7 pu thick above. 
Teliospores typically rounded below. 
Teliospore-wall moderately thin, 1.5-3 Me 
Urediniospores (with pores in optical section) 
triangular, 20-26 pu long. 
Urediniospores (with pores in optical section) 
oblong-ovate, 23-34 yu long. 
Teliospore-wall thick, 3-5 pu. 
Urediniospore-wall thin, 1-1.5 u. 
Urediniospore-wall moderately thick, 1.5~3 . 
Urediniospores sparsely echinulate. 
Urediniospores moderately echinulate. 
Teliospores typically narrowed below. 
Pedicel cinnamon-brown. 
Pedicel colorless. 
Teliospore-wall laminate. 
Teliospore-wall not noticeably laminate. 
Teliospore-wall rough. 
Paraphyses in the uredinia; teliospore-wa!l tuberculate. 
Paraphyses not associated with uredinia. 
Urediniospore-wall colorless; teliospore-wall verru- 
cose. 
Urediniospore-wal! cinnamon- or chestnut-brown. 
‘Teliospore-wall prominently verrucose. 
Teliospore-wall inconspicuously verrucose or ver- 
rucose-rugose. 
Host belonging to family Cichoriaceae. 
Urediniospore-pores 2 (rarely 3), equatorial or superequatorial. 
Urediniospore-wall thin, 1.5 u or less. 
Urediniospores small, 15-20 X 17-22 nu. 
Urediniospores larger, 19-26 X 23-29 yp. 
Urediniospore-wall thicker, 1.5 4 or more. 
Urediniospores large, 24 X 29.4 or more. 
Urediniospores smaller, 24 X 29 wu or less. 
Aeciospores rather large, 20 X 25 yu or less. 
Aeciospores smaller, 19 X 23 u or less. . 
Urediniospore-pores 3-6 (rarely 2), equatorial or indefinite. 
Urediniospores rather small, 20-24 u long. 
Urediniospores larger, 23-33 u long. 
Urediniospore-wall moderately thick, 1.5-3 yu. 
Urediniospore-wall thinner, 1-2 yp. 
Teliospore-walls uniformly thick, 1.5 u. 
Teliospore-walls 1.5-2.5 u, thicker over germ-pores. 
1. * Dicaeoma Sorghi (Schw.) Kuntze, Rev. Gen. 33: 470. 
Puccinia Sorghi Schw. Trans. Am. Phil. Soc. IT. 4: 295. 1832. 
Uredo Zeae Desmaz. Ann. Sci. Nat. IT. 13: 182. 
Puccinia Maydis Bérenger, Atti Sci. Ital. 6: 475, hyponym. 1845. 
Puccinia Zeae Bérenger; Klotzsch, Herb. Viv. Myc. Suppl. 18. 
Trichobasis Maydis Niessl, Abh. Nat. Ver. Briinn 3:114. 1865. 
Aecidium Oxalidis Thiim. Flora 59: 425. 1876. 
241. 
242. 
243. 
244, 
237. 
238. 
250. 
260. 
246. 
254. 
255. 
245. 
248. 
249. 
247, 
258. 
259. 
257. 
256. 
236. 
235. 
251. 
260. 
261. 
262. 
263. 
264. 
266. 
268. 
265. 
267. 
269. 
Aecidium Peyritschianum Magnus, Ber. Nat.-Med. Ver. Innsbruck 21: 34. 
O. Pycnia amphigenous, few, in small groups or intermixed with the aecia, honey-yellow 
becoming brownish, rather inconspicuous, globoid, 90-110 4 in diameter; osticlar filaments short. 
Dz 
S88 
1840. Not U. Zeae Schw. . 
Not Uredo Maydis DC. 1815, 
1, 
SS bs 8 b 
b Sy ob So boo 
Ss ob S 8S sy by 
pistoricum. 
sphenicum. 
exornaium. 
oaxacanum, 
277 
Baccharidis-hirtellae, 
egressum. 
Helianthellae. 
. Cnici. 
Gymnolomiae. 
Verbesinae. 
irregulare. 
aemulans. 
Helianthi-mollis, 
massale, 
Calece. 
abruplum. 
senecionicola. 
invelaium, 
cognatum, 
ratum. 
nothum. 
Zexmeniae. 
Cnici. 
. Lapsanae. 
Harknessii. 
Stephanomeriae. 
variabile. 
insperatum. 
proximelium, 
Orbicula, 
hemisphaericum, 
Crepidis-montanae. 
1898. 
1822. 
1894. 
* Species of Dicaeoma on Poaceae in collaboration with Frep Denton FromMge. 
