(Vol. 13 

 212 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



zone and about 6 ix in diameter over the incrustation; no gloeo- 

 cystidia; spores copious, hyaline, even, 6 X 4-4^^ [i. 



Fructifications in fragments 1-3 cm. long, 1-2 cm. wide. 



On badly decayed frondose wood. Porto Rico. December. 



This species resembles in aspect Peniophora cremea and P. 

 mutata, and its h^i^hae are similarly coarse and loosely arranged 

 but both cystidia and gloeocystidia are lacking. The incrusted 

 zone at the base of the subhyrnenium is about 30 [i. thick and 

 very characteristic. Each hypha assumes incrustation upon 

 entering this zone, has position parallel to the other hyphae, and 

 is devoid of incrustation beyond the zone. 



Specimens examined: 

 Porto Rico: Rio Piedras, Palo Seco, La Isabell Grove, J. A. 



Stevenson, 3523, type (in Mo. Bot. Gard. Herb., 6635). 



28. C. lacteum Fries, Epicr. 560. 1838; Hym. Eur. 649. 

 1874; Sacc. Syll. Fung. 6: 610. 1888; Massee, Linn. Soc. Bot. 

 Jour, 27: 132. 1890. — Not C. lacteum of Bresadola, v. Hohnel & 

 Litschauer, nor probably of Bourdot & Galzin, and Rea. 



Thelephora lactea Fries, Syst. Myc. 1: 452. 1821; Elenchus 

 Fung. 1 : 205. 1828. — Corticium pellicula (Fr. ?) Karsten, Soc. 

 pro Fauna et Fl. Fenn. Meddel. 11:5. 1885. 



Type: in Fries Herb. — the specimen determined by E. Fries. 

 Authentic specimen in better condition in Kew Herb. — the 

 cream-colored fructification collected by Lbd., Svex. Soderm, 

 Oct. 



Fructifications effused, thin, membranaceous, tender, small 

 pieces separable, becoming cream-colored to cinnamon-bufif in the 

 herbarium, even, more or less cracked, the margin whitish, fibril- 

 lose; in section 150-300 ]x thick, not colored, with the hyphae 

 densely and longitudinally arranged along the substratum and 

 then curving upward to the hjnaaenium, 23^-4 [x in diameter, in- 

 crusted in the subh^inenial region, occasionally nodose-septate; 

 no gloeocystidia nor vesicular bodies; spores hyaline, even, sub- 

 globose, about 5-63^ X 5-6 ^, pointed at the base. 



Fructifications 3-8 cm. long, 2-5 cm. wide. 



On decaying wood and limbs of coniferous and frondose species 

 and on the ground. In Europe and in northern United States 



