10 ACOTYLEDONS. FUNGI. BoVlSta, 



Hab. On horse-dung, early in the morning, Hopk. 



Very fugacious. In an early stage it is a small yellow sessile vesicle, 

 which, in a short time, acquires the pellucid inflated receptacle or 

 stipes, upon the acuminated point of which the vesicle is inserted. 



6. SCLEROTIUM. 

 Solid, varying in form, internally of one uniform texture, exter- 

 nally frequently corrugated. 



1. Scl. durum, ovate hard somewhat striated dull black. Pers. 

 p. 121. 



Hab. On the dried stalks of herbaceous plants^ about Edinb. Nov, 

 Mr. Greville. 



Elongated, and, for the most part, obtuse ; often, however, of an in- 

 determinate form, white within, substance tough. 



2. Scl. Erys'iphe, epiphyllous, granules aggregated brownish 

 black fixed upon a white downy substance. Pers. p. 124. 



(3. curylea, down very minute, tubercles impressed upon the disk 



somewhat hairy. Erysile sitffulta, Nees von Esenh. t. \A. 



f. 134. 

 Hab. On the underside of the leaves of Betula alba, about Edinburgh. 



August. Mr. Greville. 



7. TUBER. 

 Roundish, fleshy ; siilstance variegated with seminiferous veins. 

 1. T. cibarium, blackish studded with wart-like excrescences. 



Pers. p. 126. Sow. t. 309. Lycoperdon Tuler, Lightf. 



p.\m\. 

 Hab. Subterraneous j found in the woods of Miggerney, in Glen 



Lyon, Perthshire, by Mr. Menzies, in the greatest perfection in 



autumn and winter, Lightf. 

 Roundish, 2—3 inches in diameter. These Fungi, under the name 



of Truffles, are greatly employed upon the continent for sauces of 



almost every kind. They are hunted for by dogs, who scratch them 



up with their feet ; hogs likewise root them up with their snouts, 



and persons follow to secure them. 



Sect. HI. Dermatocarpi. Membranaceous, coriaceous^ or 



hairy Fungi, JiUed internally with the dust-like sporules. 

 A. Trichospermi. Seminal dust mixed with filaments. 



8. BOVISTA. 



Pmidium smooth, sessile, the exterior covering {volvaP) white, 

 and at length becoming partially evanescent, opening irregu- 

 larly at the top. [Seminal dust purplish brown.) 



I. B. nigrescens, large white at length becoming brownish black, 

 beneath plicate. Pers. p. 137. Lycoperdon globosum, Hopk. 

 Glotf. p. 163. Lycoperdon Bovista, Sow. t. 331. 



Hab. Dry fields, in the summer and autumn, Hopk. 



Gbbosc, or roundish oblong, opening with a large aperture. 



