OF ARTS AND SCIENCES. 249 



infundibuliform and not true scyphi, and niuch of the habit of C. unci- 

 alis ; thus distinguishing it from C. bellidifiora, to which Floerke referred 

 it. It is probable that the " B^omyces tubulosus, Richard. Canada," 

 of Herb. Willd. ! which also appeared to me to resemble C. deformis, 

 belongs to Mlchaux's species, and in this case the thallus is squamulose, 

 and the podetia are finely pulverulent above. It appears certain that 

 the C. sulphurina of Fries is not the C. Hookeri of this Enumeration. 

 The species is also common in North Carolina, according to Fries, who 

 received his specimens from Schweinitz. 



XIV. BiEOMYCES, Fr. 



Apothecia from the first globose, immarginate, velate, at length emp- 

 ty and araneous within, the base closely surrounding a stipe. Thallus 

 crustaceous, uniform, protruding fertile stipes, which are destitute of a 

 cortical stratum. 



The structure of Bseomyces roseus has been illustrated very minute- 

 ly by Dr. Kiittlinger (Allg. Bot. Zeit. 1845, pp. 577-584, & t. vi.). 



B. roseus^ Pers. Crust verrucose, glaucous ; stipes short, cylindrical ; 

 apothecia subglobose, flesh-colored. Fr. Lichenogr. p. 246. 



Sterile clay-soils, and sands ; New England ; and abundant also on 

 the sterile surfaces of slides in the White Mountains. New York, Tor- 

 rey. Pennsylvania, Mulil. 



XV. BIATORA, Fr. 



Apothecia margined at first by a waxy thalline exciple converted 

 into a proper exciple, becoming at length hemispherical or globose, 

 subimmarginate, solid, and cephaloid. Disk at length dilated, turgid, 

 concealing the paler margin, placed upon a stratum oftener paler, never 

 coal-black. Thallus horizontal, arising from a hypothallus, somewhat 

 crustaceous, effigurate, or uniform. Podetia wanting, but the apothe- 

 cia stipitate in a few species. The margin of the apothecia never 

 originally black. Fr. 



Sect. I. Thallus squamose, or lobed at the circumference. 



* Apothecia sessile. 



1. B. decipiens, Fr. Scales of the thallus discrete, somewhat pel- 

 tate, angulate, dark-flesh-colored ; beneath and at the circumference 



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