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[Vol. 13 

 238 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



C. Rosae has thick fructifications which are conspicuous by 

 their reddish brown color and prominent white margin. The oc- 

 currence on wild rose bushes should aid in recognition of the 

 species. The loose attachment to the substratum by a broad 

 layer of longitudinally arranged hyphae is suggestive of the 

 genus Stereum but the specimens do not have the margin reflexed 

 in the least degree; I know of no Stereum of which this may be the 

 resupinate stage. 



Specimens examined : 

 British Columbia: Sidney, J. Macoun, 275, type (in Mo. Bot. 



Gard. Herb., 63772) and another specimen of the same number 



comm. by J. Dearness (in Mo. Bot. Gard. Herb., 63773). 



5^48. C. apiculatum Bresadola, Mycologia 17: 68. 1925. 



C. areolatum Bresadola, Mycologia 17: 68. 1925. 



Type: in Weir Herb. 



Fructifications broadly effused, thin, membranaceous, tender, 

 small portions separable when moistened, between ivory-yellow 

 and cream color, even, contracting in drying and cracking into 

 angular masses about 1 mm. in diameter more or less completely 

 separated by fissures which show the floccose subiculum along 

 their sides, the margin thinning out, fibrillose; in section 90-130 y. 

 thick, not colored, composed of loosely interwoven, thin-walled 

 hyphae 23^-43^ yi in diameter, with an occasional incrusting 

 granule, occasionally nodose-septate; no gloeocystidia; spores 

 hyaline, even, 43^-5 X 2)^-3 p.. 



Fructifications 2-5 cm. long, lJ^-3 cm. wide. 



On decaying branches of Alnus tenuifolia. Alabama to Idaho, 

 and British Columbia to Mexico. October and December. 



C. apiculatum belongs in the C. lacteum group of species. It 

 should be recognized in its region by occurrence on Alnus, cream 

 color, and small, somewhat elliptical spores. C. areolatum has a 

 fructification with the areolate masses separated from one an- 

 other by rather wide fissures but of same color as type of C. 

 apiculatum, spores the same size, and fructification separable to 

 the same degree certainly not closely adnate. 



Specimens examined : 

 Alabama: Montgomery, R. P. Burke, 199, 202, 671 (in Mo. Bot. 



Gard. Herb., 57075, 57078, 63102). 



