64 WILLOW FAMILY 



Salix myrtilloides L in ne 1753 Bog Willow 



Low shrub, 1-3 ft. high, with grayish or brownish twigs; leaves elliptic 

 to oblanceolate or spatulate, or more rarely oblong, margin entire, revo- 

 lute, tip rounded or acute, base rounded to tapering, smooth, green above, 

 glaucous beneath, 2-4 cm. long, 1-2 cm. wide, or 2-5 cm. long, J / 2 -l 

 cm. wide in the narrow forms, petioles 2-5 mm. long ; staminate catkins 

 2-3 cm. long, stamens 2, filaments smooth, pistillate catkins short, 1^-3 

 cm. long, \y 2 cm. wide, capsules ovoid, beaked, smooth, red-brown ; 

 myrtilloides, myrtle-like. The variety pedicellaris differs 

 only in the narrow oblong or oblong-linear leaves mentioned above. 



Frequent in bogs and wet meadows in the north, rarer southward, and 

 lacking in the southwest; Quebec-NY-Ia-B.C. 



Salix cordata M u h 1 e n b e r g 1803 Cordate Willow 



Shrub, 4-12 ft. high, the twigs often minutely hairy; leaves lanceolate 

 to oblanceolate, finely and usually closely toothed on the margin, tip 

 acute or somewhat pointed, tapering toward the base, somewhat white- 

 hairy when very young, smooth when mature, paler beneath, 4-8 cm. long, 

 8-15 mm. wide, petioles 3-6 mm. long; staminate catkins 3-4 cm. long, 

 stamens 2, filaments smooth, pistillate catkins 4-5 cm. long, 1^ cm. wide in 

 fruit, capsules ovoid, beaked, smooth; cordata, heart-shaped, referring 

 perhaps to the large heart-shaped stipules, which are often lacking. In the 

 variety angustata, the leaves are linear-lanceolate. 



Frequent throughout the state along river banks and in marshes ; 

 Nebr-Ga-Mo-Colo-Cal-B.C. 



Salix balsamifera B arratt 1839 Balsam Willow 



Shrub, 3-10 ft. high, with dark shining twigs; leaves elliptic, ovate- 

 lanceolate or ovate, finely toothed or more closely wavy-toothed, the teeth 

 glandular, tip pointed, base rounded or slightly heart-shaped, somewhat 

 hairy when young, smooth when mature, green above, very glaucous be- 

 low, veins prominent, 4-9 cm. long, 2-3 cm. wide, petioles 1^2-2 cm. 

 long; staminate catkins 2^-3 cm. long, 1 cm. wide, stamens 2, filaments 

 smooth; pistillate catkins 3-4 cm. long, 1-1 5^2 cm. wide, capsules ovoid. 

 beaked, smooth : balsamifera, balsam-bearing, in reference to the 

 glandular leaves. 



Rare — chiefly in the Red River Valley: Labrador-Me-Ont-Minn-Man- 

 itoba. 



