166 



Mycologia 



A very interesting sterile form of this species has appeared in 

 abundance, both last year and this year, beneath a large white oak 

 on the grounds of the New York Botanical Garden, a few fertile 

 sporophores being present in each case and being similar in all 

 respects to the sterile ones except as regards spore formation. 

 The lamellae of the sterile plants remain pure-white and exceed- 

 ingly thin ; microscopic sections show the basidia undeveloped and 

 devoid of sterigmata, the very few inflated cystidia being similar 

 in form and abundance in both fertile and sterile sporophores. 

 The sterility is absolute and without apparent cause. 



Hebeloma praecox sp. nov. 



Early Hebeloma 



Plate 49. Figure 2. X 1 



Pileus convex to expanded, slightly umbonate, gregarious, 4-5 

 cm. broad; surface dry, glabrous, opaque, smooth, ochraceous- 

 isabelline ; margin incurved, entire or undulate, showing no trace 

 of a veil ; context white, sweet, odor pleasant ; lamellae sinuate, 

 arcuate, close, many times inserted, pallid when young, fulvous 

 at maturity ; spores ovoid, smooth, pale-ochraceous, not conspicu- 

 ously nucleate, 5-6 X 3-4 p ; stipe fleshy, brittle, subequal, stuffed 

 to hollow, finely scabrous, sometimes rough, cremeous, 3-4 cm. 

 long, 5-8 mm. thick. 



Type collected among mosses on a shady bank in the New York 

 Botanical Garden, June 20, 1910, by W. A. Murrill. Also col- 

 lected again in the same spot, June 8, 191 1. This is the first 

 species of Hebeloma to appear in this locality. Although not at 

 all viscid when found on either occasion, it might well become 

 slightly so in wet weather. The remnants of the partial veil are 

 left clinging to the stipe as the expansion of the pileus progresses, 

 leaving none on the margin. 



Coprinus sterquilinus (Fries) Quel. 

 Large-spored Inkcap 



Plate 49. Figure 3. X 1 



Pileus ovoid to expanded, cespitose, 3-7 cm. broad ; surface 

 white and villose in young plants, becoming radiate-sulcate and 

 blackish with age, the disk at all stages being brownish and squar- 



