13. Salix Cordata Muhl. Heart-Leaved Willow. Missouri Or Diamond Willow

Fig. 1463

Salix cordata Muhl: Neue Schrift. Ges. Nat. Fr. Berlin

4: 236. pl. 6. f. 3. 1803. Salix angustata Pursh, Fl. Am. Sept. 613. 1814. S. cordata angustata Anders. Vet. Acad. Handl. 61: 159.

1867. S. missouricnsis Bebb, Gard. & For. 8: 373. 1895. S. acutidens Rydb. in Britton, Man. 315. 1901.

A shrub, 5°-12° high, or a tree up to 50 tall, the twigs puberulent or glabrous; young leaves pubescent. Mature leaves oblong-lanceolate to linear-lanceolate, green on both sides or paler beneath, acuminate at the apex, narrowed, obtuse or subcordate at the base, serrulate with glandular teeth, green in drying; stipules oblique, serrulate, usually large and persistent; petioles 4"-9" long; aments leafy at the base, expanding before the leaves, the staminate about 1' long, the pistillate 1 1/2-2 1/2 in fruit; bracts silky, persistent; stamens 2; filaments glabrous; style short; capsules narrowly ovoid, acute, glabrous, 2"-4" long, short-pedicelled. In wet soil, New Brunswick to British Columbia, Virginia, Missouri, Colorado and California. Hybridizes with S. sericea and other species. April-May.

Salix Mackenziana Barrett, a small tree, with young leaves glabrous or merely puberulent, cuneate, finely serrate, and pedicels 2-4 times as long as the bracts, occurs from Manitoba westward.

Salix lutea Nutt., with light yellow twigs, is apparently otherwise inseparable from S. cordata.

It ranges from western Nebraska to Assiniboia.

14. Salix Adenophylla Hook. Furry Willow

Fig. 1464

Salix adenophylla Hook. Fl. Bor. Am. 2: 146. 1839. Salix syrticoia Fernald, Rhodora 9: 225. 1907-

A straggling shrub, 3°-8° high, the twigs, petioles, stipules and leaves densely silky-tomentose, the silky hairs falling away from the leaves when old. Leaves ovate, acute or short-acuminate, or the lower obtuse at the apex, cordate or rounded at the base, finely serrulate with gland-tipped teeth, 1-4' long, 8"-2' wide; petioles stout, 1 1/2"-3" long, dilated at the base; stipules ovate-cordate, obtuse, serrulate, persistent; aments dense, expanding with the leaves, the staminate about 1' long, the pistillate 1 1/2'- 4' long in fruit; bracts villous, persistent; stamens 2; filaments glabrous; style filiform, longer than the stigmas; capsule nearly sessile or ovoid-conic, acute, 1 1/2"-2 1/2" long.

On lake and river shores. Labrador to James Bay, Ontario, Pennsylvania and Michigan. Hybridizes with S. cordata. April-May.

15. Salix Purpurea L. Purple Willow

Fig. 1465

Salix purpurea L. Sp. PI. 1017. 1753.

A slender shrub or small tree, with purplish flexible twigs, maximum height about 120; branches often trailing; bark smooth and very bitter. Leaves oblanceolate or spatulate, acute, serrulate, narrowed at the base, short-petioled, glabrous, green above, paler and somewhat glaucous beneath, 1 1/2'-3' long, 21/2"- 4" wide, some of them commonly subopposite; stipules minute; petioles 1"-2" long, not glandular; aments appearing before the leaves, dense, leafy at the base, the staminate about 1' long, the pistillate 1-2' long, sessile or nearly so; stamens 2; filaments and sometimes also the anthers united, pubescent; bracts purple, persistent; stigmas very nearly sessile; capsules ovoid-conic, obtuse, tomentose, 2 1/2" long.

Sparingly escaped from cultivation in the Atlantic States, Ontario and Ohio. Native of Europe. Also called bitter-, rose or whipcord-willow. April-May.