336 



[Vol. 3 



ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Fig. 8 



S. Langloisii. 



a, probasidium forming a 



sjjore-bearing organ ; b, two 



Fpore-bearing organs; p, para- 



physes; s, spores. X 640. 



divisions which are more distinct towards the margin; in 

 structure 200-25(V thick, witli hyphae fuscous under the micro- 

 scope, thick-walled, even, loosely 

 interwoven from substratum to 

 hymenium, densely interwoven in 

 the hjTnenium and bearing hya- 

 line, flexuous, suberect terminal 

 branches or paraphyses and hya- 

 line jDrobasidia which are ex- 

 ceeded by the paraphyses ; spores 

 hyaline, simple, even, slightly 

 curved, 15-21 X 5-7 V^f^, appar- 

 ently produced singly at the 

 apex of a nearly straight, 2-3-celled, spore-bearing organ 

 into which the probasidium develops. 



Fructification up to 5 cm. long, 2 14 cm. broad, 14 ^^^ 

 thick. 



On bark of living branches of Crataegus, Carpinus, and 

 water oak. Florida to Louisiana and in Grenada. Novem- 

 ber to May. 



This species resembles 8. frustulosum in having the fruc- 

 tification divided into narrow sinuous divisions and differs 

 from that species in being blue colored, verging into smoke- 

 gray or paler in some specimens, instead of honey-yellow. 

 The specimen from Grenada is thinner than those from 

 other localities. 



Specimens examined: 

 Exsiccati: Ravenel, Fungi Am., 450, under the name Ste- 



reum pruinatum. 

 Florida: Gainesville, H. E. Stevens, comm. by E. Bartholo- 

 mew, 40a (in Mo. Bot. Gard. Herb., 44211) ; same locality, 

 Ravenel, in Ravenel, Fungi Am., 450. 

 Alabama: Montgomery, B. P. Burke, 52 (in Mo. Bot. Gard. 



Herb., 9558). 

 Louisiana: St. Martinville, A. B. Langlois, 2995, type. 



