= 
ON SOME SPECIES OF CERASTIUM. 35 
said to be twice the length of the calyx; _— character would 
exclude at least most English specimens, for, in the numerous speci- 
mens that I have seen, the capsule rarely sania the calyx by more 
than half the length of the latter, and it is more often less than this. 
Nor is the character correctly specific as applied to Continental speci- 
mens. I = therefore led to suspect that M. Grenieris not well acquainted 
with C. tetrandrum, Curt. as distinct from C. pumilum, Curt. ; and 
- that he has drawn up his characters of C. pumelum from specimens of 
C. 
C. tetrandrum, as well as of C. a My suspicion is 
strengthened by M. Grenier’ s ae nm above, viz., that the 
description of C. pumilum in “ Flo Boies ” should be united to 
that of C. glutinosum of the same eleks for it is well known that C. 
pumilum of ** Flore de France” is C. tetrandrum, Curt. 
Also M. Grenier speaks of ‘‘ the type C. pumilum with herbaceous 
distingul and he further says the variety from the environs of Bordeaux is 
man of wh i ich are tetramero ¥ ee believe the plant 
from Bordeaux, which I cere ve be C. dain Lois. and Pers., an 
to h M. Grenier here alludes, is one of the two tolerably well- 
ate & 
; m, Fries. Persoon 
description of alsinotdes (Syn. Pl., p. 521), na “Loisclouats (Fl. Gall., 
2, p. 324), well express C. tetrandrum, 
If I am correctin my view, M. Grenier’s a. genuinum and 3. inter- 
medium should therefore be excluded from the synonymy of \C. pumilum, 
Curt., and there would remain on - his B. espe and his y. litigio- 
g the | 
even a single plant of C. pumilum on sandy ground ; it seems to be 
essentially a plant of the limestone, and it prefers declivities on the-hills 
where the limestone roc ock appears above lcs “gaping = teh there 
m 
ton at the Lizard Point, Cornwall, 1839 (see his article in Ann. Nat. 
Hist., ser. iii, vol. iii., p. 22). * Prof. Babington in the same 
article gives it as his opinion, after careful investigation of living 
and dried plants, that C. pumilum, Curt., O. giniapnen, Fries, 
