342 SALICACEAE 
obtusish, nearly glabrous: style very short : stigmas lobed: capsules rarely containing fer- 
tile seeds, ovoid-conic. 
Naturalized in eastern North America, except the extreme north. Native of Asia. 
8. Salix Floridàna Chapm. A branching shrub 2-4 m. tall, with sparingly pubescent 
twigs. Leaf-blades oblong or oblong-lanceolate, 5-8 cm. long, acute, serrulate, glabrous, 
dark-green above, glaucous beneath, rounded or truncate at the base; petioles 4-10 mm. 
long, pubescent: mature pistillate aments oblong-cylindrie, 4-7 cm. long, fully 2 em. 
thick, dense: capsules ovoid-conic, 6-8 mm. high, glabrous. 
On rocky banks, middle and western Florida. 
9. Salix cordàta Muhl. A shrub 1-5 m. high, often widely spreading from the base. 
Twigs stout, usually hairy : winter buds plano-convex, decidedly larger on the staminate 
than on the pistillate shoots: leaf-blades oblong-lanceolate, sharply serrate, tapering, 
rounded, or obscurely cordate at the base, green on both sides, usually silky when young, 
glabrous at maturity, not blackening in drying; stipules mostly large and conspicuous : 
aments very silky, appearing before the leaves, the staminate about 2 cm. long: stamens 
2, with free filaments: pistillate aments 3-6 cm. long, 1 em. thick: stigmas short and thick, 
usually two-lobed : capsules ovoid, acute. 
In wet soil or on banks of streams, New Brunswick to British Columbia, North Carolina, Missouri 
and California.—A form with linear-lanceolate leaf-blades is, S. cordata angustata (Pursh) Anders. 
10. Salix Missouriénsis Bebb. A tree, reaching a height of 15 m., with a trunk 
usually less than 5 dm. thick and gray scaly bark. Twigs pubescent or puberulent : leaf- 
blades lanceolate or sometimes oblanceolate, 7-15 cm. long, 1-3 em. wide, acuminate, finely 
serrate with gland-tipped teeth, usually glaucous beneath: aments appearing before the 
leaves, the staminate 2.5—4 cm. long, pubescent, the pistillate 7-10 cm. long, silky: style 
very short: capsules narrowly ovoid. 
On river banks, Missouri to Nebraska and the Indian Territory. 
11. Salix luteoserícea Rydb. A branching shrub 1-6 m. high, occasionally mon- 
oecious, with grayish bark. Leaf-blades linear-lanceolate, or linear, 2-8 cm. long, 2-6 
mm. wide, acute, entire or remotely denticulate, permanently yellowish silky : staminate 
aments 2-3 cm. long ; bracts obovate : pistillate aments 3-5 cm. long ; bracts broadly lance- 
olate : capsules elongated ovoid, 4-5 mm. long, soon glabrate. 
On sand bars, Saskatchewan and British Columbia to Nebraska, the Indian Territory and Arizona. 
12. Salix intérior Rowlee. A low shrub, often forming thickets, or a slender tree 6-9 
m. tall, with a trunk sometimes 3 dm. thick. Twigs brown to gray: buds plano-convex, 
obtuse, very small: leaf-blades linear-lanceolate or linear, ordinarily 6-10 cm. long, less 
than 1 em. wide, varying to much wider, especially on young shoots, remotely dentate, the 
teeth narrow and spinulose: aments on short lateral branches, which bear 4-6 leaves, 
loosely flowered, the staminate 2-4 cm. long and 1-2 cm. thick ; bracts usually glabrous or 
slightly hairy toward the base, narrowly oblong: filaments crisp-hairy below the middle : 
capsules sometimes nearly or quite glabrous, conic-ovoid, about 5 mm. long. 
Along streams and lakes, Quebec to the Northwest Territory, Virginia, Tennessee and Texas. 
13. Salix linearifólia Rydb. A low branching shrub, with early glabrous foliage. 
Branchlets red: leaf-blades narrowly linear or nearly so, 4-10 cm. long, 2-4 mm. wide, 
remotely dentate ; stipules minute, deciduous : aments terminating leafy branches, loosely 
flowered, the staminate about 3 em. long, the pistillate 3-4 cm. long : bracts nearly glabrous, 
about as long as the pistils: capsules conic, 3-4 mm. long, glabrous. 
On sand bars, Saskatchewan to Minnesota, the Indian Territory and Colorado. 
14. Salix petiolaris J. E. Smith. A shrub 2-4 m. tall, with erect or ascending slender 
branches. Leaf-blades lanceolate, 4-9 cm. long, slightly silky when young, acuminate at 
both ends, serrulate with blunt cartilaginous teeth, short-petioled, remaining green in dry- 
ing: aments unfolding before the leaves, the staminate, 1-2 cm. long, dense: pistillate 
aments loosely flowered, becoming 2-2.5 em. long: stigmas nearly sessile : capsules ovoid- 
oblong below the tapering apex, 4-6 mm. long, about twice aslong as the slender pedicels. 
In swamps or low grounds, New Brunswick to the Northwest Territory and Tennessee.—S. petio- 
laris grácilis Anders. is a form with narrower leaf-blades and pedicels nearly as long as the capsules. 
15. Salix discolor Muhl. A shrub or small tree, becoming 7 m. high. Trunk 
rarely 3 dm. thick, with dark bark: branches tough : buds large, glabrous, nearly black : 
leaf-blades oblong or oblong-lanceolate, 5-10 cm. long, sometimes silky when young, becom- 
ing glabrous and rigid at maturity, dark-green above, glaucous-white beneath, entire Or 
remotely serrate, slender-petioled ; stipules conspicuous, acute: aments sessile, appearing 
before the leaves, large, cylindric, the staminate brilliant yellow at anthesis ; bracts oblong, 
rounded, fringed with long white hairs: pistillate aments becoming 4-7 cm. long: pedicels 
