[Vol. 12 

 340 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



P. tephra belongs in the group with P. laevigata and P. pruinata 

 but does not have the colored cystidia of the former nor the 

 pruinose hymenium of the latter. The Australian specimen from 

 Berkeley under the name P. tephra, in N. Y. Botanical Garden 

 Herbarium, has colored cystidia and is more probably P. laevigata. 



Specimens examined: 

 Mexico: Motzorongo, near Cordoba, W. A. & E. L. Murrill, 

 997, comm. by N. Y. Bot. Gard. Herb, (in Mo. Bot. Gard. 

 Herb., 54623). 

 Cuba: C. Wright, type (specimen in Curtis Herb, mounted on 

 left side of card) ; Ceballos, C. J. Humphrey, 2692 (in Mo. Bot. 

 Gard. Herb., 21942); Ciego de Avila, Earle & Murrill, 592, 

 comm. by N. Y. Bot. Gard. Herb. ; Herradura, Earle & Mur- 

 rill, 143, comm. by N. Y. Bot. Gard. Herb. 

 Porto Rico: Bayamon, J. A. Stevenson, 6760 (in Mo. Bot. Gard. 



Herb., 55059). 

 Bermuda: Agricultural Station, H. H. Whetzel, Ak (in Mo. Bot. 

 Gard. Herb., 58909). 



109. P. pruinata (B. & C.) Burt, n. comb. 



Stereum pruinatum Berk. & Curtis, Linn. Soc. Bot. Jour. 10: 

 332. 1868; Sacc. Syll. Fung. 6: 583. 1888; Massee, Linn. Soc. 

 Bot. Jour. 27: 198. 1890. 



Type: in Kew Herb, and Farlow Herb. 



Effused, adnate, drying pale neutral gray to drab-gray, 

 pruinose, cracking when thick, the margin very thin; in section 

 fuscous throughout, becoming zonate and finally 1 mm. thick, 

 composed of densely arranged, erect, colored hyphae 3 y. in 

 diameter and of very numerous cystidia in all regions of the 

 section; cystidia incrusted, fusiform, 18-22 X 6-12 p.; spores 

 hyaline, even, subglobose, about 3-43^ X 23^-3 [l in the few 

 found. 



Fructifications probably cover large areas, for those are 5-10 

 X 1-5 cm. and fractured on 3 or all sides in the specimens seen. 



On rotting hardwood logs. Florida, Alabama, Mexico, and 

 the West Indies. June to March. Occasional. 



Dried specimens have the livid or cinereous color of some 

 forms of P. cinerea but with surface of rather more velvety tex- 



