324 THE JOURNAL OF BOTANY 



CRITICAL NOTES ON SOME SPECIES OF CEBASTIUM. 



By Fbedehic N. Williams, F.L.S. 

 (Continued from Journ. Bot. 1899, 477.) 



[A provisional classified list of the species of Gerastium was 

 printed in Bull. Herb. Boiss. 1898, pp. 893-904, and includes 123 



species : — 



Subgenus I. Dichodon (4 species). 



Subgenus II. Strephodon. — Ser. 1. Recticapsulares (2G species). 



Ser. 2. Curvatocapsulares (1 species). 

 Subgenus III. Ortbodon. — Sect. 1. Cryptodontia (2 species). 



Sect. 2. Scbizodontia (9 species). 



Sect. 3. Cheileodontia (81 species). 



Tins last, the largest section, is likewise divided into two 

 series, — 



1. Becticapsulares (37 species), and 



2. Curvatocapsulares (44 species). 



Grenier, in his monograph of the genus (1841), describes only 

 48 species. 



The series ©f notes, in Journ. Bot. 1899, ended with Cerastium 

 fulvitm, in alphabetical sequence of published specific names ; this 

 sequence in the resumed notes is strictly followed, as a matter of 

 convenience. For the purpose of uniformity and conciseness in any 

 descriptions which follow, subgeneric and sectional characters as 

 defined in the provisional classified list above mentioned are omitted. 

 The numbering is continued, and the alphabetical sequence is re- 

 sumed where the previous notes broke off twenty-two years ago.] 



126. C. fubcatum Chamisso & Schlechtendal, in Linncea, i. 61 

 (1826). — Collected by Redowsky, in the course of the Bomanzoff 

 Expedition, in E. Siberia (without more precise locality). This 

 collection is in the Herbarium of Petrograd. From recent com- 

 munications received at Kew from Mr. Boris Fedtschenko — who, 

 botanists will be pleased to know, is working at the Institute reserved 

 in Petrograd as a refuge for men of science — it is probable that this 

 famous Herbarium has not been damaged, still less destroyed, by 

 agents of the Bolshevist government. It was with an account of 

 Bedowsky's collections that Linncea started on its useful and brilliant 

 career in 1826. The authors distinguish the plant from C. ovctivm 

 by its being more hairy and much smaller in all its parts. The name 

 is mentioned (on p. 72) by Grenier in his monograph (1841), but is 

 accidentally omitted from the index. Ledebour, Fl. Bossica, i. 407 

 (1842), regards it as a reduced and stunted form of C. rigidum. 

 The original description differs hardly at all from that of C. alpinurn, 

 which is not uncommon in E. Siberia, to which also Torrey & Gra} r , 

 Fl. N. Amer. i. 188, refer C. rigidum as a variet}'. 



127. C. Gayanum Boiss., Diagn. PI. Or. nov. Ser. ii. fasc. 1. 92 

 (1854). — There is but one sheet of specimens in Herb. Kew., varying 



