1924] 
BURT—THE THELEPHORACEAE OF NORTH AMERICA. XIII 9 
and the hymenial layer; hymenium inferior, nearly even; no 
cystidia; basidia simple; spores hyaline, even, 5-714 x 3-4 y. 
Dried fructifications about 215 mm. long; pileus 1-114 mm. 
long, 1 mm. broad; stem 1 mm. long, 120 y in diameter. 
On dead wood in Cuba and on Nostoc coating rocks in Trinidad. 
Specimens examined: 
Cuba: C. Wright, 3, type (in Curtis Herb.). 
Trinidad: Maravel Beach, near Port of Spain, В. Thaxter (in 
Farlow Herb.). 
CYTIDIA 
r. qoaa, Fl. Myc. Fr.—. 1888; Patouillard, Essai Tax. 
. ; Bourdot & Galzin, Soc. Myc. Fr. Bul. 26: 222. 
1910; Rea, T Basid. 697. 1922.—Lomatia Karsten, a 
Vet.-Soc. Bidrag Natur och Folk 48: 403. 1889.—Auri 
R. Maire, Rech. Cyt. Тах. 102. 1902, and Soc. Myc. Fr. Bul. ie 
Suppl. 102. 1902; Sace. Syll. Fung. 21: 423. 1912. 
Fructifications coriaceous-gelatinous, eup-shaped, sessile, scat- 
tered or crowded, often confluent; hymenium even at first, 
becoming more or less wrinkled or veined; basidia simple; spores 
white. 
Cytidia is a genus 5-5 few species һауе usually been included 
in Corticium but differ from this genus in being resupinate by 
the middle only, with margins free as in some species of Stereum. 
The configuration of the hymenial surface is decidedly merulioid 
in our single indigenous species. 
KEY ТО THE SPECIES 
White or nearly so, pubescent or ёотепёозе................... 1. C. flocculenta 
White villose; hymenium blood-red 2. C. salicina 
Deep olive-buff to drab; hymenium becoming coarsely merulioid . ..3. C. tremellosa 
1. Cytidia flocculenta (Fr. v. Hóhn. & Litsch. K. Akad. 
Wiss. Wien Sitzungsber. 116: 758. 1907; Wiesner Festschr. 
Wien 61. 1908; Bourdot & Galzin, Soc. Myc. Fr. Bul. 26: 222. 
1910; Rea, Brit. Basid. 697. 1922. Plate 1, fig. 7. 
Thelephora flocculenta Fries, Elench. Fung. 1: 184. 1828.— 
Corticium flocculentum Fries, Еріст. 559. 1838; Hym. Eur. 647. 
1874; Saec. Syll. Fung. 6: 605. 1888.—Cyphella ampla Léveillé, 
Sci. Nat. Bot. III. 9: 126. 1848; Fries, Hym. Eur. 662. 
