50 
Chester Co., Penn. (Kilvington, in Herb. Acad. Nat. Sci., Phil.) 
This variety is to be regarded as the extreme broad-leaved 
and hairy form of the species. Its range appears to be restricted 
to the serpentine barrens of Pennsylvania, where it apparently 
passes gradually into the var. oblongifolium. 
Var. FUEGIANUM, Hook., f. Low; smooth; leaves short, small, 
coriaceous and imbricated, lanceolate to ovate-lanceolate in out- 
line ; pedicels solitary, or in few-flowered cymes; capsules some- 
what exceeding the calyx. (Plate LXIV., f. 3.) 
C. arvense, var. 
Collected by Professor J. M. Coulter, Aug. 11th, 1872, at 
Lower Fire Hole Basin, Yellowstone Park. 
This interesting form is identical with the var. Fuegianum, 
Hook..t, in Bot. U.S. Expl Exp.1., 129 (our. Plate LxXIV, 
f. 4), from Fuegia, with specimens of which we have compared 
it. 
, Coulter, in Hayden Rep., 1872, 762, name only. 
. As analagous to this remarkable distribution we have that of 
"ed Carex Magellanica, Lam., whose range in North America is 
_ from the arctic regions to northern Pennsylvania and Utah. 
EXPLANATION OF THE PLATES. 
- Plate -LXIU.—Cerastium arvense, L., var. oblongifolium, drawn 
from a living plant collected on Todt Hill, Staten Island, 
New York, May 26th, 1886. 
Plate LXIV., fig. 1—C. arvense, L. Drawn from a specimen 
collected by Prof. T. C. Porter, on the shore of the Delaware 
River below Phillipsburg, N. J. 
‘Fig. 2.—C. arvense, L., var. maximum Drawn from a 
specimen collected by Mrs. M. K. Curran, near San 
Francisco, Cal. 
Fig. 3.—C. arvense, L., var. Fuegianum. Drawn from speci- 
men collected by Prof. J. M. Coulter, at the Lower Fire 
Hole Basin, Yellowstone National Park. . 
Fig. 4.—C. arvense, L., var. Fuegianum, Hook., f. from 
Orange Harbor, Fuegia. 
Plate LXV., Fig. 5—C. arvense, L., var. latifolium, Fenzl. Drawn — 
from specimen collected in the mountains of Colorado, 1872, 
by Dr. Torrey. 
