59 6 



SALICACEAE. 



VOL. I. 



ii. Salix pyrifolia Anders. Balsam Willow. 



Fig. 1461. 



Salix cordata var. balsamifera Hook. Fl. Bor. Am. 2: 



149. 1839. 



5. pyrifolia Anders. Vet. Acad. Handl. 6 1 : 162. 1867. 

 5". balsamifera Barratt ; Hook. loc. cit. As synonym. 



1839. Bebb. Bot. Gaz. 4: 190. 1879. 



A shrub, 4-io high, the twigs glabrous, shin- 

 ing, the youngest foliage pubescent. Mature leaves 

 elliptic, ovate-oval or obovate, thin, glabrous, acute 

 or some of them obtuse at the apex, rounded or 

 subcordate at the base, dark green above, glaucous 

 and prominently reticulate-veined beneath, 2'-$' long, 

 l'-i4' wide, slightly crenulate-serrulate the minute 

 teeth glandular; stipules minute or none; petioles 

 slender, 3" -6" long; aments expanding with the 

 leaves, leafy at the base, cylindric, the staminate 

 dense, about i' long, the pistillate rather loose, 2'-$' 

 long in fruit; bracts villous, persistent; stamens 2; 

 filaments glabrous ; style almost none ; capsules very 

 narrow, acute, glabrous, 2"-2j" long, slender- 

 pedicelled. 



In swamps, Newfoundland to British Columbia, south 

 to Maine, New York, Michigan and Minnesota. May. 



12. Salix glaucophylla Bebb. Broad- 

 leaved Willow. Fig. 1462. 



S. glaucophylla Bebb, in A. Gray, Man. Ed. 6, 485. 1889. 



A shrub, 4-io high ; foliage glabrous or when 

 young sparingly pubescent. Mature leaves ovate, 

 obovate or oblong-lanceolate, firm, dark green and 

 shining above, white-glaucous beneath, short-acumi- 

 nate, the base rounded or acute, serrulate with gland- 

 tipped teeth, 2'~4' long, i'-2 r wide ; stipules large, 

 persistent; petioles stout, 3"-6" long; aments ex- 

 panding before the leaves, leafy at the base, the 

 staminate i '-2' long, the pistillate 1^-3' long in fruit; 

 bracts densely white-villous, persistent; stamens 2; 

 filaments glabrous ; style filiform ; capsule beaked 

 from an ovoid base, acute, glabrous, 3"-s" long, 

 slender-pedicelled. 



On sand dunes, Quebec to Alberta, Maine, northern 

 Ohio and Illinois and Wisconsin. April. 



13. Salix cordata Muhl. Heart-leaved Wil- 

 low. Missouri or Diamond Willow. Fig. 1463. 



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



4: 236. pi. 6. f. 3. 1803. 



Salix angustata Pursh, Fl. Am. Sept. 613. 1814. 

 S. cordata angustata Anders. Vet. Acad. Handl. 6 1 : 159. 



1867. 



6". missouricnsis Bebb, Card. & For. 8: 373. 1895. 

 5". acutidens Rydb. in Britton, Man. 315. 1901. 



A shrub, 5-i2 high, or a tree up to 50 tall, the 

 twigs pnberulent or glabrous; young leaves pubes- 

 cent. Mature leaves oblong-lanceolate to linear- 

 lanceolate, green on both sides or paler beneath, 

 acuminate at the apex, narrowed, obtuse or subcor- 

 date at the base, serrulate with glandular teeth, 

 green in drying; stipules oblique, serrulate, usually 

 large and persistent; petioles 4"-$" long; aments 

 leafy at the base, expanding before the leaves, the 

 staminate about i' long, the pistillate \\'-2.\' in fruit ; 

 bracts silky, persistent ; stamens 2 ; filaments gla- 

 brous; 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. 



