White: Tylostomaceae of North America 431 



7. Tylostoma poculatum sp. no v. 



Peridium globose, somewhat depressed, 1— 1.5 cm. high, 1-2 cm. 

 in diameter, smooth, fawn-colored, membranaceous : outer peridium 

 scaly, but more persistent than in most species, remaining in the 

 shape of a cup-like involucre round the base of the peridium, 

 mouth slightly raised, fimbriate, mostly large : collar entire, in- 

 conspicuous : stem 1-3 cm. long, 3-6 mm. in diameter, cylindri- 

 cal, firm, slightly bulbose, hollow or stuffed, often with consider- 

 able remnants of the outer peridium attached : capillitium lightish 

 yellow, sparingly branched, septate, swollen at joints, 4-7 fi wide, 

 rather thick walled : spores ferruginous, subglobose, smooth, or 

 irregularly ridged in the older specimens, owing to the shrinking of 



the inner substance, short pediceled, 4-5 fx in diameter. (PI. 34, 

 f. 4-6.) 



Nebraska : Lone Pine, Bates, 462 (type) ; Alabama : Tuske- 

 gee, Carver ; Colorado : Boulder, D. M. Andres. Plants grow- 

 ing singly or in groups of twos and threes. 



/■ 



1878 



Peridium globose pyriform, 2.2 cm. high, 2 cm. in diameter, 

 smooth, leathery, whitish, with a kid-like finish : outer peridium 

 scaly, retreating, leaving a narrow ring around the lower part of 

 the peridium : collar entire, descending about the stem : mouth 

 raised, lacerate, rather large: stem 4 cm. long, hard, leathery, 

 somewhat sulcate, slightly tapering at the base, 8 mm. in diameter 

 at the top, 5 mm. in diameter at the base : capillitium dark 

 ferruginous, slender, free ends rounded, branched, septa none or 

 very scarce, 3-6 //. wide : spores globose, smooth, short pediceled, 

 3-6 ft in diameter. (PI. 3 2, f. 4-6.) 



Colorado. 



This description and the figure are based on the specimen of 

 this species which Mr. Ellis retained when he sent other specimens 

 to M. C. Cooke for a description. It will be seen that the dimen- 

 sions and shape here given differ considerably from the one fig- 

 ured in Grevillea. The type is at Kew (2715 Cke.), and through 

 the kindness of Mr. E. S. Salmon, it was possible to compare some 

 of the spores and capillitium which agree in all respects with the 

 original here, but the Kew specimens are apparently not so 

 mature. 



