CATALOGUE. 327 
Salix reticulata, L. DC. Prodr. 16. 2. 301. Decumbent, the 
branches leafy at the summit ; ament terminal, very long peduncled, densely 
flowered, narrow-cylindric ; peduncle leafy ; scales yellowish-pink, rounded- 
ovate ; capsules oval-ovate, sessile, hoary-tomentose ; nectary somewhat cup- 
shaped, surrounding the base of the capsule and often exceeding it ; style 
very short or none; stigmas 2-cleft, brown, divaricate; leaves petioled, 
round-elliptic, often rugose, i^ale-glaucous beneath, reticulalely veined, en- 
tire. — Grreenland and the Arctic coast, Labrador, lliuilaska, and in the Rocky 
Mountains of Colorado. East Humboldt and Clover Mountains, Nevada, 
and the Uintas ; 9-11,000 feet altitude ; August, September. Stems rather 
stout, wholly prostrate, leafy only at the summit ; leaves G-9" long, oblong 
or suborbicular, mostly rounded at the apex, obtuse at base or subattcmmtc 
into a long and slender petiole; sterile aments 2-4" loiitr and very loosely 
flowered ; fertile aments also short, (3-6",) densely flowered, on long naked 
peduncles. (1,102.) 
Early specimens of some other species, too immature for determination, 
were collected in the neighborhood of Carson City, Nevada. (1,103.) 
PoPULUS TREMULOiDES, Mx. From the Northern States, Newfound- 
land, and Canada, to the Arctic Sea and Oregon, and southward in the 
mountains to California (f), Arizona, and New Mexico. Frequent in the 
upper canons of Nevada and Utah, rarely attaining 1° in diameter and 30° 
in height ; 6-9,000 feet altitude. (1,104.) 
PopuLUS MONILIFEEA, Ait. From Western New England to Missouri, 
on the Arkansas and in Louisiana, and westward to California and Oregon. 
Not seen in Utah, and less frequent in Nevada. Referred by AVesmael in 
DC. Prodromus to P. Canadensis, Desf, but Alton's name is much tiie 
older. (1,105.) 
PopuLUS BALSAMIFERA, L., Yar. ANGUSTiFOLiA, (P. angustifoUa, James.) 
Branches terete, glabrous; leaves ovate-lanceolate, attenuate at base, acute, 
glabrous, crenate-serrate. — Leaves varyiiiir much ])etwecn the (Jidiiiary 
growth (2-3' long by 8-12" wide, acute at base and often subrhonil)(>i(lal) 
and that of the younger shoots where they may b(^ 6-8' lon^^ and or more 
broad, and often cordate at base; always with a long acuniination. It is 
referred by AYesmael in the Piodrouius ti) P. mon'difera, (his P. Canndensh^ 
but its affinities are wholly with P. hahamifera, of wliicli it is tlx' ]janow- 
leaved form, as P. candicans is on the opposite extreme the broad-cordate 
