tRYPTOGAMlA ALGvE. 851 



Aikraw. Scoiis aufiralibus, ' . 



About the trunks and roots of trees not uncom- 

 mon, often mixed with the L. pulmonarlus. We 

 have alfo feeri it fometinies in ftoney places, and 

 at the foot of rocks. 

 The leaves fpread theinfelves a palm's breadth, or 

 more, divided into broad fegmcnts, obtufely 

 lobed at the extremities, of a bluifli green or 

 glaucous colour when freili, and greenifh adi co- 

 lour when dry. 

 The upper fide is funk into irregular pits or cavi- 

 ties, and the difc of the leaves, efpecially near 

 the extremities of the fegm.ents, fprinkled with 

 many grey farinaceous warts ; and frequently 

 the waved margins of the leaves are covered with 

 the fame colour'd farinaceous powder. 

 The under fide of the leaves is downy, without 

 Veins, and fprinkled with white fpots. The down 

 is fufcous, fpongy, and thickeit towards the 

 bale of the leaves, but thinner and vrhltifli, or 

 bufF-colour'd towards the extremities. The white 

 fpots are nothing elle but fmall protuberances, 

 occafioned by the cavities on the upper fide, and 

 which, being covered with lefs down than the 

 other parts, appear vv'hite. 

 The fhields are very rarely produced. They grow 

 upon the difc of the leaf; thofe which I faw not 

 larger than a fmall pin's head, concave and red 

 within, fi^rinaceous and buff-colour'd without. 

 I i i 2 This 



