CLINTON: NORTH AMERICAN USTILAGINEAE. 
423 
length ; spores subhyaline or yellowish tinted, with free surface at 
least provided with a prominent deeper colored verrucose epispore 
(sometimes even 3-6 fx thick), quite irregular, chiefly oblong to 
subspherical, 12-18 fx or most elongated clavate forms even 27 fx in 
length. 
Host: Boerhaama sp., Mex. (type). 
The writer is indebted to Professor Farlow for specimens of the 
type of this species collected by Pringle at Chihuahua in Sept., 1886. 
Apparently these are in a rather young condition as many of the 
spore balls are still surrounded by a deep layer of subgelatinized 
fertile hyphae from which the spores have been formed and 
nourished. 
Thecaphora Thornberi Griff. 
Thecaphora Thornberi Griff., Bull. Torr. Bot. Club, 31: 88. 1904. 
Sori in ovaries, generally clustered in the inflorescence, sub- 
spherical, about 2-5 mm. in horizontal diameter which usually 
slightly exceeds the vertical, upon rupture disclosing reddish granu¬ 
lar spore mass; spore balls light chestnut brown, ovoid to spherical, 
rather regular, very firm (at least when young), composed of many 
spores, chiefly 80-125 g in length ; outer spores at least covered 
with an evident light chestnut colored membrane or exospore which 
is somewhat papillate or wrinkled on exposed surface, but inner 
spores smooth and apparently hyaline, very irregular, clavate to 
subspherical, 12-18 /x, or most elongated forms even 30 /x, in length. 
Host: Cladothrix lanuginosa, Ariz. (type). 
This species was collected by Griffiths in the Santa Rita Mountains 
near Helvetia, Ariz., where it was abundant but was not seen else¬ 
where. Upon crushing the spore balls the spores usually separate 
from the colored membrane or exospore as hyaline cells; apparently 
this exospore is not developed so prominently on the inner parts 
or inner spores. These hyaline spores or cells are often irregular 
in shape usually somewhat clavate. They appear hardly mature, 
as often the protoplasm is quite homogeneous in character and not 
sharply marked off from the cell wall. The specimens, however, 
were collected in October. 
