370 NORTH AMERICAN FLORA [VoLuME 7 
below, slightly or not constricted at septum; wall chestnut-brown, 2-5 » thick, much thicker at 
apex, 7-12 », smooth; pedicel slightly tinted, from one-half to twice length of spore; meso- 
spores few, obovoid, 21-23 by 27-35 »; wall chestnut-brown, 2.5-3 » thick, thicker at apex, 
7-9 py, smooth. 
On BROMELIACEAE: 
Pitcairnia Palmeri S. Wats., Jalisco. 
TYPE LOCALITY: Panoptico, near Quito, Ecuador, on Pitcairynia sp. 
DISTRIBUTION: Southern Mexico; also in South America. 
ILLustrations: Holway, N. Am. Ured. 1: $1. 5, f. 23. 
Exsiccatt: Barth. Fungi Columb. 4065; Barth. N. Am. Ured. 359. 
142. Dicaeoma (?) Commelinae (Holway) Arthur. 
Puccinia Commelinae Holway, Ann. Myc. 2: 393. 1904. 
Oand I. Pyenia and aecia unknown. 
II. Uredinia hypophyllous, scattered, circular or oval, 0.1-1 mm. long, early naked, 
pulverulent, cinnamon-brown, ruptured epidermis conspicuous; urediniospores globoid or 
broadly ellipsoid, 19-26 by 23-30 »; wall cinnamon-brown, 1.5—2 y thick, moderately or sparsely 
echinulate, the pores 2, equatorial. 
III. Telia hypophyllous, crowded, usually circinating about the uredinia, round, small, 
0.1-0.3 mm. in diameter, tardily naked, compact, blackish-brown, ruptured epidermis incon- 
spicuous; stroma surrounding the telium, thin, chestnut-brown; teliospores irregularly clavate 
or oblong-clavate, 15-23 by 35-71 w, rounded, obtuse or acute above, narrowed below, slightly 
constricted at septum; wall cinnamon-brown below, chestnut-brown above, thin, 1-2 p, 
thicker above, 3-10 4, smooth; pedicel colorless or slightly tinted, short, up to 104 long, 
fragile. 
On COMMELINACEAE: ; 
Commelina coelestis Willd., Oaxaca. 
Commelina graminifolia H.B.K., Morelos, 
Commelina pallida Willd., Jalisco, Morelos. 
Commelina tuberosa T,., Jalisco. 
Commelina sp., Mexico (state). 
Type Locaiiry: Guadalajara, Mexico, on Commelina sp. 
DISTRIBUTION: Southern Mexico. 
ILLUSTRATIONS: Holway, N. Am. Ured. 1: 91. 5, f, 24. 
Exsiccatt: Barth. N. Am. Ured. 31, 984. 
143. Dicaeoma obscurum (Schroet.) Kuntze, Rev. Gen. 33: 469. 
1898. 
ee, compositarum Bellidis Westend.; Westend. & Wallr. Herb. Crypt. Belg. 837, hyponym. 
Aecidium Bellidis Thim. Fungi Austr., 635, hyponym. 1873. 
Puccinia obscura Schroet.; Pass. Nuovo Giorn. Bot. Ital. 9: 256. 1877. 
Puccinia Bellidis Lagerh. Bol. Soc. Broter. 8: 134. 1890. 
Puccinia Luzulae-maximae Dietel, Ann. Myc. 17: 57. 1919. 
O. Pycnia amphigenous, numerous, scattered, honey-yellow, becoming brownish, globoid, 
90-140 n wide by 110-150, high; ostiolar filaments short, not protruding above the 
epidermis. 
I. Aecia amphigenous, numerous, scattered or loosely gregarious, cupulate, 0.2-0.4 mm. 
in diameter; peridium whitish, erect, the margin entire or lacerate; peridial cells rhomboidal, 
20-28 by 25-35 u, abutted, the outer wall rather thick, 7-9 u, transversely striate, the inner 
wall thinner, 3-5 », moderately verrucose; aeciospores globoid or angular, 15-19 by 16-22 4; 
wall light-yellow or colorless, rather thin, 1-1.5 », moderately verrucose. 
ON CARDUACEAE: 
Bellis perennis L., in Europe; not yet found in America. 
II. Uredinia amphigenous, often chiefly hypophyllous, or caulicolous, numerous, scattered, 
oval or oblong, 0.2-0.6 by 0.3-1 mm., rather early naked, pulverulent, golden- or cinnamon- 
brown, ruptured epidermis noticeable; urediniospores ellipsoid, ovate or globoid, 16-24 by 
24-30 pw; wall golden-brown, moderately thick, 1.5~2 », bluntly and rather coarsely echinulate, 
the pores 2, superequatorial. 
