CEYLON FUNGI. . 43 



Pleurotus polychromus , Lentinns velatus, Polyporns olivaceo- 

 fuscus. Lycoperdon phlehophorum, Hypocrea artocreaH were all 

 described from immature specimens ; Lepiota cpnocephalo , 

 Psalliota lasiophrys, and Psalliota cdidota were described 

 from drawings of weathered and decaying specimens ; and 

 Psalliota chrysocycla, Hygrophorus bicolor, and HygropJwrus 

 degantissimus owe some of their distinguishing characters to 

 the fact that they have been " caught " by the dry weather. 

 fjeotia brunneola was founded on a drawing only : the specimen 

 was gelatinous, and when put out in the sun to dry was lost : 

 there is no evidence that it was a Leotia. 



In some cases the names of host plants have been wrongly 

 transcribed from Thwaites' sheets, and in others synonyms 

 have not been recognized. Triphragmium Thwaitesii on 

 Hedera vahlii differs only slightly from T. davellosum on 

 Paratrope terebinthacea : it may be questioned whether 

 Berkeley would have separated these two had he known thai 

 the names of the host plants were synonymous. Similarly, 

 Cooke separated Ravenelia Hobsoni, Cke., on an undetermined 

 host plant, from R. stictica, B. & Br., on Pongamia glabra: 

 but the undetermined host pioves to be Pongamia glabra, 

 and the fungus on it R. stictica. More recently, Dietel 

 instituted Ravenelia zeylanica for a form on Gleditschia which 

 Berkeley included with R. sessilis, Berk., on Albizzia Lebbek, 

 but the supposed leaves of Gleditschia are really Albizzia 

 Lebbek, and the fungus was correctly named by Berkeley. 



Thwaites' specimen 426 is laljelled Pterygota r//a/o. which is 

 a synonym of Sterculia Thwaitesii, Mast., but Berkeley and 

 Broome name it Rhytisma maculosum, B. & Br., on Sterculia 

 (data, Roxb., which is not a Ceylon plant. Thwaites' .518 is 

 correctly labelled Memecylon timbellatum . but Berkeley and 

 Broome call it Chionanthus zeylanicus, and name the fungus 

 on it Sphceria chionanthi, B. & Br. Thwaites' 423 consists of 

 fungi on leaves labelled " Ficus parasitica '" .■ it has been 

 separated into Dothidea rhytismoides . Cd. . ' oa Hugonia 

 mystax,'' D. microcentra, B. & Br., "on leaves apparently of 

 Artocarpiis ." and D. aspidea. B. & Br. " on Fictis repens'' 



Though Thwaites was deeply interested in cryptogamic 

 botany he seems to have relinquished the study of fungi 



