420 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Thecaphora Californica (Hark.) Clint. 
Sorosporium Californicum Hark., Bull. Calif. Acad. Sci., 1: 161-162. 1885. 
Thecaphora Californica Clint., Journ. Myc., 8 : 146. 1902. 
Exsiccati: Sorosporium Californicum Hark., on Grindelia robusta, 
Ell. & Ev., N. A. Fungi, 1495, Rab.-Wint., Fungi Eur., 3504. 
Sori rather indefinite in the flower heads, more or less destroying 
the florets 5 spore balls rather firm, chiefly subspherical, composed 
of 7-20 spores, 22-38 p in diameter; spores light yellowish brown, 
chiefly triangular to polygonal or subcircular in cross section, with 
contiguous sides flat and smooth and free surfaces rounded and 
prominently verruculose, chiefly 11-17 p in length. 
Host: Grindelia robusta , Calif, (type) . 
The above species differs from Thecaphora pilulaeformis in the 
laiger spore balls composed of more numerous and more regular 
spores with prominent verruculations. It differs from Thecaphora 
cuneata in the smaller spore balls and in the general shape of the 
spores. The germination has not been reported. 
Thecaphora cuneata (Schof.) Clint. 
Sorosporium cuneatum Schof., Coutr. Bot. Dep. Uni. Neb., 3 : 48. 1892. 
Sorosporium solidaginis Ell. & Ev., Proc. Acad. Nat. Sci. Phila., 1893 • 
156. 1893. 
Thecaphora cuneata Clint., Journ. Myc., 8 : 146. 1902. 
Exsiccati: Sorosporium cuneatum Schof., on Grindelia squarrosa , Ell. 
& Ev., N. A. Fungi, 3565, Ell. & Ev., Fungi Col., 1282. 
Sori rather indefinite in the flower heads causing more or less 
abortion and distortion; spore balls ovoid to subspherical, rather 
firm, composed of numerous (chiefly 40-75) spores,* 40-80 p in 
length; spores reddish brown, in cross section usually wedge shape, 
v ith outer free surface rounded and prominently verruculose, chiefly 
14—22 p in length. 
Hosts: Grindelia squarrosa , Ivans., Neb. (type); Solidago 
Missouriensis , Ivans, (type S. solidaginis). 
I his species differs from Thecaphora Californica in the larger 
spoie balls with more numerous spores that are cuneate in cross 
section. The original collection from Nebraska shows these dif¬ 
ferences much more markedly than that from Kansas. The writer 
