Part 8, 1922] AECIDIACEAE 599 
somewhat tardily naked, pulverulent, chestnut-brown, ruptured epidermis conspicuous; 
urediniospores obovate or globoid, flattened laterally, when viewed with pores in face view 
20-26 by 23-28 u, when in side view 16-20 by 23-28 uw; wall dark cinnamon-brown, 2-2.5 u 
thick, moderately and prominently echinulate, the pores 2, equatorial. 
TIT. Telia not seen; teliospores occasional in the uredinia, oblong, clavate, or obovoid, 
20-24 by 38-48 4, rounded above, rounded or somewhat narrowed below, noticeably con- 
stricted at septum; wall light cinnamon-brown, thin, 1.5—-2 p, lighter above and thicker, 3-5 My 
smooth; pedicel colorless, equaling spore or shorter. 
ON CaRDUACEAE: 
Guardiola mexicana Humb. & Bonpl., Morelos. 
TYPE LocaLiIty: Cuernavaca, Mexico, on Guardiola mexicana. 
DIsTRIiBUTION: Known only from the type locality. 
27. Puccinia Noccae Arth. Bot. Gaz. 40: 202. 1905. 
Puccinia Lagascaeae Speg. Anal. Mus. Nac: Buenos Aires 19: 307. 1909. 
II. Uredinia amphigenous, scattered, round, small, 0.25 mm. across, soon naked, pulver- 
ulent, cinnamon-brown, ruptured epidermis inconspicuous; urediniospores globoid or broadly 
obovoid in face view, 24-26 by 23-26 un, flattened laterally and cuneate in side view, 19-24 by 
23~26 w; wall cinnamon-brown, 1.5-2 4 thick, closely and evenly echinulate, the pores 2, 
near hilum. 
III. Telia amphigenous, scattered, round, small, 0.25 mm. across, soon naked, becoming 
pulverulent, blackish, ruptured epidermis inconspicuous; teliospores broadly oblong or ellip- 
soid, 26-31 by 32-42 4, rounded at both ends, or somewhat obtuse above, not constricted at 
septum in the thicker walled spores, prominently so in the thinner ones; wall dark chestnut- 
brown, 2-4 » thick, thickened to 10-12 » by a low semi-hyaline umbo over pore of upper cell 
and often similarly over pore of lower cell, smooth; pedicel colorless, firm, once to once and a 
half length of spore. 
On CaRDUACEAE: 
Nocca decipiens (Hemsl.) Kuntze (Lagasca decipiens Hemsl.), Jalisco. 
Nocca rigida Cav. (Lagasca suaveolens H.B.K.), Guatemala; Oaxaca, Morelos. 
Tyre Locality: Sayula, Jalisco, Mexico, on Nocca decipiens. 
DISTRIBUTION: Southern Mexico to Guatemala; also in South America. 
28. Puccinia Otopappi Sydow, Monog. Ured. 1: 129. 1902. 
Il. Uredinia not seen; wrediniospores in the telia, globoid or ellipsoid, 21-27 by 24-30 x; 
wall cinnamon-brown, 2.5-3 u thick, strongly and sparsely echinulate, the pores 2, equatorial. 
Ill. Telia chiefly epiphyllous, scattered, small, round, 0.2-0.5 mm. across, blackish, 
somewhat tardily naked, becoming pulverulent, ruptured epidermis noticeable; teliospores 
ellipsoid, 28-32 by 38-48 u, rounded at both ends, not constricted at septum, wall chestnut- 
brown, thick, 3-5 y, thickened to 6-7 « above by a lighter colored layer and over pore of lower 
cell, which is ustially placed midway between pedicel and septum, smooth; pedicel colorless, 
fragile, equaling spore or shorter. 
On CaRDUACEAE: . ; , 
Otopappus alternifolius B.I,. Robinson, San Luis Potosi. 
Typr Locality: San José Pass, Mexico, on Otopappus alternifolius. 
DISTRIBUTION: Known only from the type locality. 
29. Puccinia Parthenii (Speg.) Arth. Bull. Torrey Club 37: 570. 1910. 
Uredo Parthenii Speg. Anal. Mus. Nac. Buenos Aires 6 : 239. 1899. 
II. Uredinia amphigenous, scattered or gregarious, round or oval, 0.3-0.5 mm. across, 
somewhat tardily naked, pulverulent, dark cinnamon-brown, ruptured epidermis conspicuous; 
urediniospores globoid or ellipsoid, 20-24 by 23-32 yu, often distorted and irregular, some spores 
much enlarged; wall cinnamon-brown, 2-3.5 u thick, moderately and very finely echinulate, 
appearing almost smooth when wet, the pores 2 or 3, equatorial or irregularly disposed. 
Ill. Telia not seen; teliospores occasional in the uredinia, semi-opaque, ellipsoid, 28-32 
by 38-48 », rounded or obtuse above, rounded below, not constricted at septum i wall chocolate- 
brown, 4-5 » thick, thicker above, 6-9 4, by a broad sub-hyaline umbo, similarly thickened 
