606 



THE AGARICACEAE OF MICHIGAN 



coccola assumes a reddish hue. Some consider the latter species 

 a form of A. ovoidea Fr. to which our plant cannot be referred, but 

 to which it may be related. 



646. Amanita spreta Pk. (Deadly Poisonous) 



N. Y. Stale Mus.. Rep. 32, 1879. 



Illustrations: Atkinson, Mushrooms, Fig. 71, p. C9, 1900. 

 Plate CXVIII of this Report, 



PILEUS 7-12 cm. broad, ovate at first, then broadly convex-ex- 

 panded, pale brown to umber-colored, often unicolorous, glabrous or 

 with a few large patches of the white universal veil, slightly viscid, 

 margin even or obscurely striatulate. FLESH white, soft, thick, 

 a Inaptly thin at margin. GILLS crowded, reaching the stem and 

 adnexed by a decurrent line, rather broad, narrowed behind, sub- 

 vcntricose, pure white, edge fimbriate-serrulate, its traina with 

 diverging hyphae. STEM 10-15 cm. long, stout, 10-20 mm. thick, 

 equal or tapering slightly upward, stuffed then hollow, striate and 

 mealy above the annulus, subglabrous or subfibrillose below, whit- 

 ish, not bulbous, inserted at base into the rather large, thickish, 

 persistent, membranous, sheathing, white VOLVA. ANNULUS 

 white above, tinged umber beneath, thin, membranous, superior. 

 SPOEES elliptical, 11-12x0-7 micr., nucleate at maturity, smooth, 

 white. No cystidia. Basidia 4-spored. 



Solitary or gregarious. On sandy soil, in the pine plains of 

 western Michigan now covered with scrub-oak, etc., where it is fre- 

 quent. September. New Richmond, along the Kalamazoo River. 



Known by the sheathing volva and the bulbless stem, which are 

 both deeply immersed in the sandy soil and imitate Amanitopsis 

 vagmata in this respect. The color of the pileus is uniformly 

 darker than it is given by Peck. It prefers sandy soil. Its stout 

 li a bit and its spores, as well as the base of the stem, are strikingly 

 different from A. porphyria. A. cinerea Bres. of Europe also lacks 

 Hi'- bulb but is a much smaller plant. 



