1926] 



BURT THELEPHORACEAE OF NORTH AMERICA. XV 193 



Type: in Kew Herb, and Farlow Herb. 



Fructifications long and widely effused, thin, adnate, from white 

 becoming cream-buff to warm buff in the herbarium, waxy, often 

 granular, finally very much cracked into minute areolae, 1-3 to 

 a mm., which flake away from the substratum sometimes leaving 

 some of the white subiculum on the latter, the margin thinning 

 out; in section 120-250 y. thick, not colored, composed of sub- 

 erect, interwoven, thin-walled hyphae 23^-3}^ (x in diameter, 

 incrusted in the subhymenial region so as to form a conspicuous 

 subhymenial zone of mineral matter; no cystidia nor gloeocystidia; 

 spores hyaline, even, 4-6 X 2-3 \l. 



Fructifications 2-8 cm. long, 1-4 cm. wide. 



On fallen decaying limbs of frondose species. New York to 

 Louisiana and westward to Kansas, in the West Indies, Japan, 

 and South Africa. June to January. Common in the southern 

 states. 



C. scutellare, when fully mature in the southern states, may be 

 recognized at sight by the very numerous areolae wholly separ- 

 ated from one another by fissures, but less mature and more 

 northern specimens may be cracked into more rectangular masses 

 up to 2 cm. in diameter and more or less connected together. In 

 such specimens the subhymenial zone of mineral matter is a 

 helpful character, for this zone is constant and conspicuous when 

 sections are examined and, together with the small spores, afford 

 sharp distinctive characters. 



Specimens examined: 

 New York: Albany County, S. H, Burnham, 29 (in Mo. Bot. 



Gard. Herb., 54484); Alcove, C. L. Shear, 998; Fort Ann, S. H. 



Burnham, 43, in part (in Mo. Bot. Gard. Herb., 54453) ; Hudson 



Falls, S. H. Burnham, 16, 85 (in Mo. Bot. Gard. Herb., 54499, 



54451); Ithaca, H. S. Jackson, C. Thorn, comm. by Cornell 



Univ. Herb., 18201 and 14371, respectively; Karner, H. D. 



House (in N. Y. State Mus. Herb., and Mo. Bot. Gard. Herb. 



54380), and C. H. Peck, comm. by N. Y. State Mus. Herb., 



T6 (in Mo. Bot. Gard. Herb., 54640); Meadowdale, C. H. 



Peck, comm. by N. Y. State Mus. Herb., T6 (in Mo. Bot. Gard. 



Herb., 54640); North Elba, C. H. Peck (in N. Y. Bot. Gard. 



Herb., and Mo. Bot. Gard. Herb., 55973); Port Jefferson, 



