[Vol. 13 

 212 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



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

 cystidia; spores copious, hyaline, even, 6 X 4-4 J^ ^- 



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 hyphae are similarly coarse and loosely arranged 

 but both cystidia and gloeocystidia are lacking. The incrusted 

 zone at the base of the subhymenium is about 30 y. 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-buff in the 

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

 lose; in section 150-300 y. thick, not colored, with the hyphae 

 densely and longitudinally arranged along the substratum and 

 then curving upward to the hymenium, 2J^-4 \l in diameter, in- 

 crusted in the subhymenial region, occasionally nodose-septate; 

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

 globose, about 5-63^2 X 5-6 y., 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 



