300 GRIFFITHS: West AMERICAN FUNGI 
leaf; aecidiospores globose or angular-compressed, light brown, 
20-24 yz in diameter, the epispore thick and very minutely rough- 
ened. (Fig. 10.) 
On Grindelia squarrosa Dunal. 
ee, (388), Columbia, S. D., June, 1897- 
This species, although abundant in 
© the locality and on the date men- 
tioned, is apparently rare in the 
; region. 
Fig. 10. One spore & 315, and 
diagram of vertical section of leaf Aecidium Dakotensis sp. nov. 
showing outline of cup of cidium . me 
Grindeliae, X315. i - Spermogonia brown or brown- 
black under a hand lens, yellow 
by transmitted light, hypophyllous, evenly scattered, very proml- 
nent; aecidia hypophyllous and uniformly scattered often over 
the entire lower surface, the upper surface being marked by. small, 
circular, brown elevations which mark the position of the aecidia 
below ; pseudoperidium very conspicuously lacerated into broa 
segments which are strongly recurved ; aecidiospores globose of 
compressed-angular, 15-18» in diameter, epispore smooth and 
while not particularly thick is very conspicuous and often thickened 
at the angles. 
On Aguilegia Canadensis L. (389), Big Stone Lake, S. D. 
June, 1895. Apparently a rare species. 
Claviceps ? caricina sp. nov. 
Mycelium of the fungus extending throughout the entire 
substance of the parenchymatous tissue of the center of the culm 
of the host, and condensing in one to four places into black, 
longitudinally-striated sclerotia 1.5—5 mm. x I-5 cm., the interior 
of which is white, of uniform density and made up of loosely 
interwoven, colorless, thick-walled and sparingly septate hyphae. 
Invariably associated with the above sclerotia are found, 1” 
upper portion of the culm, elongated black sori which rupture the 
epidermis much like a rust and resemble in structure a Gloeosp? 
rium with hyaline globular spores 1-2 yz in diameter. 
On Carex Nebraskensis Dewey, Andrews, Ore., Aug: 190! 
(Griffiths & Morris). Faithful but unsuccessful attempts hav 
been made to cultivate the sclerotia of this interesting species 
during the past three months. No one realizes better than the 
writer that the placing of the species in the genus Claviceps * 
