326 THE JOURNAL OF BOTANT 



fl. Corse, 511 (Oct. 1910). He says, — ■" la lanuginosite est plus 

 marquee a l'etat estival (Juiu, Juilletj lorsque les feuilles inferieures 

 sont rletries " ; and gives a clear figure of a section of the epidermal 

 surface of a leaf, contrasting it with that which obtains in ft steno- 

 petalum, — a plant also confined to Corsica. 



There is some confusion in Grenier's reference to C. physospermum. 

 In distinguishing his C. Boissieri from C. cirvense, he says : — " semi- 

 nibus imprimis multo majoribus, et perispermio hevissimo nucleis non 

 adhaerenti, ut in C. latifolio et pyrenaico, unde nomen C. physo- 

 s-permi Gay ! servare non potui." What he could not keep up he 

 does not say. 



The type-form of C. g ibra 1 tar i cum is described from specimens 

 in Herb. Kew. from the original locality indicated by Kelaart, /. c. 

 (WillTcomm Iter Hisp. pi. exs. 1815, n. G15; Ball, 1851; Munby, 

 1856; ex herb. Boissier, type-specimens coll. 1837; Lemann, 1841; 

 Boissier § Renter, 1849 ; .ff. A. Hurst, 1868 ; Hooker, 1871).— 

 Cf. svn. under note n. 50 (as to priority). 



129. C. ttLABELLiTM Turcz. Fl. Baicalensi-Dahurica, i. 213 (1843- 

 1815). — There is a single sheet of four specimens in Herb. Kew. 

 labelled " C. arvense var. glabellum Turcz." ex herb. Petropol. They 

 are 18-21 ctim. in height, with leaves 12-13 mm. They were col- 

 lected on a spur of the Yablonnoi mountains above the town of Aksha, 

 in the E. Siberian province of Trans-Baikalia, near the frontier of 

 Mongolia. It seems to be an extreme state of a series of forms 

 terminating at the other end with C. arvense var. incanum — " Ce- 

 rastio incano Ledeb. in omnibus prater glabritiem simile. An 

 varietas ? " The essential part of the description is as follows : — 

 " Erectum, glabrum, foliis lineari-oblongis vel linearibus acutis ; 

 fioribus terminalibus subtrichotomo-paniculatis ; petalis bifidis sepala 

 oblonga margine membranacea duplo superantibus." 



130. C. glaberhimum Lapeyr., Hist. abr. pi. Pyren. 265 (1813), 

 t. 101 (ined. ?) : =0. alpinum var. glabrum Iletz. Fl. Scand. Prodr. 

 ed. 1 (1779), ed. 2, 110 (1795) ; Willd. Sp. Plant, ii. 815 (1799). 

 By the few authors who refer to it credited to the latter, but, as 

 pointed out by C. A. landman in his recent Swedish Flora, p. 210 

 (1918), it was first definitely named by Retzius. The history of 

 the plant is interesting. It was clearly distinguished by Linmeus 

 long previously : — 



Cerastium foliis lanceolatis glabris L. in Act. Soc. Lit. Sc. 

 Suecicse, iii. aim. 1732, 54 (Florida Lapponica) ; Fl. Lapponica, 151 

 (April, 1737) ; C. alpinum var. ji L. Fl. Suecica, ed. 2, 159 (1755), 

 et Mant. Plant, ii. 390 (Oct. 1771). 



Linnaeus says : — " We have here two forms, of which one has the 

 leaves quite glabrous and almost shining, and the other has villous 

 leaves, but they are not distinct species, as all parts of the plant even 

 to the small parts of the fructification are similar. What then is the 

 cause of the smoothness in the other plant, since the two forms occur 

 together? " 



This memoir of 1732 is the earliest printed and duly authenti- 

 cated contribution of Linnaeus to Botanv. Of the two credited 



