[Vol. 5 



318 



ANNALS OF THE MISSOURI BOTANICAL GARDEN 



8. H. rigidula Berk. & Curtis, Linn. Soc. Bot. Jour. 10 : 

 334. 1868; Cooke, Grevillea 8: 146. 1880; Sacc. Syll. Fung. 

 6 : 593. 1888; Massee, Linn. Soc. Bot. Jour. 27 : 99. 1890. 



An H. fulvella Berk. & Curtis in Cooke, Grevillea 8 : 148. 

 1880; Sacc. Syll. Fung. 6 : 598. 1888; Massee, Linn. Soc. Bot. 

 Jour. 27 : 104. 1890? — An H. pulcherrima Massee, Linn. Soc. 

 Bot. Jour. 27 : 104. pi. 5. f. 4. 1890; Sacc. Syll. Fung. 9 : 229. 

 1891 ? — An H. scruposa Massee in Cooke, Grevillea 20 : 11. 

 1891; Sacc. Syll. Fung. 11 : 123. 1895? 

 Type: in Kew Herb, and Curtis Herb. 

 Fructifications resupinate, effused, becoming narrowly re- 

 flexed, lobed, coriaceous, rather rigid, with the upper surface 

 of the reflexed part velvety, snuff-brown at first, later Benzo- 



brown ; hymenium Benzo - brown, 

 ochraceous-tawny near the margin; 

 in structure 300-500 n thick, with the 

 setigerous layer 30-45 /x broad and 

 with the intermediate layer compris- 

 ing most of the thickness of the fruc- 

 tification and bordered on each side 

 by a narrow, dense, dark zone, of 

 which that on the setigerous side is 

 the less distinct; hyphae of inter- 

 mediate layer 3—4 /x in diameter, 

 colored, somewhat interwoven and 

 longitudinally arranged; setae con- 

 ical, 30-45x6-8 n, larger ones sometimes found, emerging up 

 to 30 n, very numerous, starting from all portions of the 

 setigerous layer; spores probably hyaline, even, 4xl|-2 /x. 



Fructifications with reflexed portion ^-1 cm. long, resup- 

 inate over areas 4x1-1^ cm. 



On dead wood and bark of frondose species. Cuba and 

 Venezuela. March. Eare. 



On account of the dark zones bordering its intermediate 

 layer, R. rigidula belongs in the small group, of which H. 

 tabacina and H. ruhiginosa are more common examples; it 

 is distinguishable from all these species by the great number 

 and crowded arrangement of its setae in the setigerous layer. 



H. rigidula. 

 Section X 68. From type. 



