422 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
y VG0I1 til6 so called species. In the case of the 
two specimens examined on Desmodium, however, there were 
ceitain difteiences (lighter colored spore balls and spores that 
averaged smaller) which if constant may possibly entitle this form 
to varietal rank. The species is near Thecaphora hyalina from 
which it is separated by the uniformly larger spore balls of more 
numerous spores. Brefeld gives the germination of the European 
form occurring on Lathyrus. Literature: 20, 29, 123. 
Thecaphora Mexicana Ell. & Ev. 
Thecaphora Mexicana Ell. & Ev., Journ. Myc., 8 : 140. 1902 
Sori on stems, prominent, forming clustered subglobose pustules 
each about 4 mm. in diameter, firm, upon rupture scattering dusty 
umber spore mass and leaving behind the remains of the hollowed 
pustules ; spore balls light reddish yellow, ovoid to spherical, com¬ 
posed of 15-30 spores separated by prominent hyaline areas that 
apparently widen with maturity, 50-90 p in length ; spores angular 
when young but with age becoming more rounded, irregular, oblong 
to polyhedral or subspherical, with distinct inner and outer coats, 
the latter thick and provided wit!) prominent irregular papillae, 
chiefly 16-22 p, most elongated rarely 25 p, in length. 
Host: Guardiola platyphylla , Mex. (type). 
This very interesting species was collected by Dr. Palmer in 
Mexico, in 1893. y The pustules are larger and more clustered than 
those formed by Thecaphora pilulaeformis. The hyaline inter- 
sporal areas are peculiar to this species and it is probable that by 
the further gelatinization of these the spores become separated. 
In the youngei condition the spore balls are found imbedded in the 
prominent semigelatinized mycelium. The germination of the 
species is not known. 
Thecaphora tunicata Clint, n. sp. 
Sori in the flowers, forming subspherical bodies about 2-3 mm. 
in diameter, enclosed by the floral envelopes, at first firm but later 
shedding out the granular spore mass; spore balls light chestnut 
brown, oblong to chiefly subspherical or spherical, composed of 
many spores, firmly united (at least at first), chiefly 70-100 p in 
