ON SOME SPECIES OF CERASTIUM. 37 
The stem is —_ so is the upper herbaceous portion of the sepals 
and e a 
, mthe specimens of C. glutinosum, Fr., which I possess, I find 
the bores of the plant is lighter than that ‘of C. pumilum, Curt., 
the seeds are ome and faintly tubercled, and the bracts are 
kedl lose i 
mar. bo-scar 4 «8 0 liteg ; 
Lens, from te Bois de Boulogne, also exhibit these characters 
plants both from limestone hills and serpentine 
ocks rance, the latter name petreum, F. Schultz, in 
% Jahrb. der Pfaeltz. Ges.” (1842)—of which I have authentic speci- 
mens gathered by E. Lamy, and distributed by M. Schultz in his- 
‘+ Herb. i Gall. et 
rm.,”’ cent 1, and also by C. Billot in his ‘* Flor. 
erm. Exsice.”—which tally exactly with English C pumilum, Curt 
M. Boreau also includes C. petreum, Schultz, in his scurum, ‘* Fl 
du Centre,” p. 111. nder the same species he alludes also to C. 
pallens, Schultz, remarking that it has more decidedly scarious bracts. 
C. pumilum, B visearium, Reich., ‘Reich. Fl. Germ - Exs.,” no. 4969, 
of which a good figure is given in ‘ Reich. Deutsch. F ky ” COxxviii. jis 
quite our English C. pumilum 
It is of course possible that M. Grenier had specimens of true 
C. pumilum before him when he drew up his descriptions, but con- 
sidered that the very narrowly scarious, ‘‘ non-albo-scariose ’’ margin of 
the upper bracts might be termed herbaceous, and that he would et 
C. pumilum, Curt., in hisa .genuinum, otherwise ; as IL have endeavoured 
to show, his 8. pallens atd ¥. litigiosum would represent C. glutinosum, 
Fr., and C. pumilum, Curt. would be but imperfectly or not at 
represented in the article of which I have given a 
Before concluding this paper I would a that in England the 
nearest allied species to C. pumilum is C. tetrandrum ; but in the early 
state the leaves of the latter are less numerous and do not form the 
lighter gree 
though the stems are often of a deep purple. The lower leaves soon 
wither, whereas those of C. pumilum are ieee _ a much longer 
period; but C. tetrandrum is a longer-lived plant than C pumilum, 
and — wht s B gedtae? has seeded and hier eae continues to 
throw 
the “Teagth of the ‘pri mary branch numerous flowering 
icles. The first form mentioned by M. Lloyd has the branches of the 
REE panicles subequal ; the second form has them more usually 
unequal. The branches of the dichotomous panicles of C. punilin, 
Curt., are subequal. The petals of C. tetrandrum are usually su 
Lens. Both the frait-stalk: ry the capsule. seen 
