[Vol. 6 



172 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



as those of Agaricus campestris when the latter is grown as a 

 mushroom for the market but they are of good size and weight, 

 are firm and keep well, and have a flavor of good quality which is 

 distinct from that of Agaricus campestris. These are desirable 

 qualities in a market species of mushroom. The origin of the 

 mycelium in the strawy manure which was spaded into the soil 

 suggests that preparation of the spawn and method of growing 

 under cultivation might be the same as those employed for the 

 common mushroom, A. campestris. 



This garden Hebeloma is apparently of local occurrence, for its 

 characteristics do not agree with those of any species heretofore 

 known. It may be that the normal season of this mushroom is 

 spring or early summer, as is the case with Pholiota vermiflua, a 

 species which was abundant in the Missouri Botanical Garden at 

 the same time. The month of May preceding had been very wet 

 and with frequent storms throughout the month. The name 

 and description of this species are as follows : 



Hebeloma hortense Burt, n. sp. Plate 3. 



\Denudata. Pileus glabrous, veil absent from the first. 



Type: in Mo. Bot. Gard. Herb., 54130, and in Burt Herb. 



Pileus fleshy, convex, umbonate, becoming expanded, even, 

 glabrous, pale Isabella-color when moist, becoming cartridge- 

 buff, with the umbo pinkish buff, the margin slightly inrolled 

 when very young; flesh whitish, farinaceous; odor not disagree- 

 able, not of radishes ; lamellae broad, slightly sinuate, moderately 

 close, white at first, becoming Isabella-color, the edge entire and 

 not distilling drops; stem fleshy, hollow, equal or slightly bul- 

 bous at the base, fibrillose, mealy above when young, with no 

 trace of a veil or cortina; spores Rood's brown in spore collec- 

 tion, even, 10-11 x 6 m, borne in fours on protruding basidia; no 

 cystidia present or not noteworthy. 



Pileus 4-10 cm. broad; stem 4-9 cm. long, 4-10 mm. thick. 



In cultivated borders where a straw manure had been worked 

 into the ground. St. Louis, Missouri. Abundant in early June 

 after prolonged rains. 



The fructifications occur singly or in small clusters of two or 

 three. This species is noteworthy in its genus by absence of 



