Part 6, 1921] AECIDIACEAE 427 
spicuous; teliospores ellipsoid, 26-30 by 36-46 u, rounded at both ends, strongly introverted 
and concave at the ends when dry, much constricted at septum; wall chestnut-brown, smooth, 
evenly thick, 3~4 y, slightly thicker at apex with a low hyaline umbo; pedicel flexuous, color- 
less, 6-8 » broad, once to twice length of spore, granulose at base. 
ON CaRDUACEAE: ° 
Gymnolomia microcephala Less., Costa Rica; Guatemala. 
Gymnolomia patens brachypoda Rob. & Greenm., Oaxaca. 
Gymnolomia subflexuosa Benth. & Hook., Oaxaca. 
Hymenostephium cordatum (H. & A.) Blake, Guatemala. 
TYPE LOCALITY: Oaxaca, Mexico, on Gymnolomia sub flexuosa. 
DistTRiBurion: Southern Mexico southward into Central America. 
Exsiccatt: Barth. N. Am. Ured. 1247, 1248. 
247. Dicaeoma Caleae (Arth.) Arthur & Jackson. 
Puccinia Caleae Arth. Bot. Gaz. 40:201. 1905. 
O. Pycnia epiphyllous, crowded in small groups opposite the aecia, punctiform, incon- 
spicuous, globoid, 100-130 broad. 
I. Aecia hypophyllous in more or less circular groups; peridium cylindric, the margin 
lacerate; peridial cells irregularly rhomboidal, 19-27 by 32-404, slightly overlapping, the 
inner wall verrucose-rugose; aeciospores globoid, 19-24 by 22-26 u; wall colorless, 1-2 u, con- 
spicuously verrucose. 
II. Uredinia amphigenous, in small groups or more commonly scattered, minute, 0.2- 
0.5 mm. across, somewhat tardily naked, cinnamon-brown, pulverulent, ruptured epidermis 
conspicuous; urediniospores globoid or obovoid, 22-28 by 26—34 4; wali dark cinnamon-brown, 
moderately thick, 1.5-3 », sparsely and strongly echinulate, the pores 2, opposite, approximately 
equatorial. 
III. Telia amphigenous, chiefly epiphyllous, scattered or sometimes gregarious, roundish, 
0.2-1 mm. across, or occasionally elongate on the veins, tardily naked, somewhat pulverulent, 
blackish, ruptured epidermis conspicuous; teliospores ellipsoid or obovate-oblong, somewhat 
irregular, 24-32 by 40-56 4, obtuse or rounded above, rounded or occasionally somewhat 
narrowed below, scarcely or not constricted at septum; wall dark chestnut-brown, thick, 
2.5-4 yw, thickened at apex and over pore of lower cell at septum to 5-10 uw usually by a paler 
cinnamon-brown umbo; pedicel colorless, firm, once to twice length of spore, often deciduous. 
On CARDUACEAE: 
?A giabampoa congesta Rose, Sinaloa. 
Calea axillaris urticaefolia Rob. & Greenm., Jalisco. 
Calea hypoleuca Rob. & Greenm., Oaxaca. 
Calea urticifolia (Mill.) DC., Costa Rica. 
Calea zacatechichi Schlecht., Guatemala. 
Calea zacatechichi macrophylla Rob. & Greenm., Guatemala. 
Calea zacatechichi rugosa Rob. & Greenm., Morelos. 
TyvPE LocaLity: Sayula, Jalisco, on Calea axillaris urticaefolia. 
DISTRIBUTION: Mexico and Central America. 
Exsiccati: Barth. Fungi Columb. 3835, 4844; Barth. N. Am. Ured. 24, 225, 930. 
248. Dicaeoma Helianthi-mollis (Schw.) Arth. 
Résult. Sci. Congr. Bot. Vienne 344. 1906. 
Aecidium Helianthi-mollis Schw. Schr. Nat. Ges. Leipzig 1:68. 1822. 
Puccinia Heliopsidis Schw. Schr. Nat. Ges, Leipzig 1: 72. 1822. 
Puccinia Helianthi Schw. Schr. Nat. Ges. Leipzig 1: 73. 1822. 
Caeoma (Aecidium) helianthatum Schw. Trans. Am. Phil. Soc. II. 4: 292. 1832. 
Caeoma (Aecidium) tracheliifoliatum Schw. Trans. Am. Phil. Soc. II. 4: 292. 1832. 
Puccinia Helianthorum Schw. Trans. Am. Phil. Soc. II. 4: 296. _ 1832. 
Aecidium (Caeoma) helianthatum Schw. Trans. Am. Phil. Soc. II. 4: 309. 1832. 
Aecidium (Cacoma) tracheliifoliatum Schw. Trans. Am. Phil. Soc. II. 4: 309. 1832. 
Puccinia Viguierae Peck, Bull. Torrey Club 12:35. 1885. 
Dicaeoma Helianthi Kuntze, Rev. Gen. 33: 469. 1898. 
Dicaeoma Heliopsidis Kuntze, Rev. Gen. 33: 469. 1898. 
Dicaeoma Viguierae Kuntze, Rev. Gen. 34: 471. 1898. 
Puccinia Helianthi-mollis H. 8. Jackson, Brooklyn Bot. Gard. Mem. 1: 250. 1918. 
O. Pycnia amphigenous, crowded in small groups 1-2 mm. in diameter, noticeable, 
honey-yellow becoming brownish, globoid, 95-160 by 95-190 4; ostiolar filaments 60-112 » 
long, agglutinated into a column. 
