70 WILLOW FAMILY 



Salix humilis Marshall 1785 Prairie Willow 



Low shrub, 2-6 ft. tall, with densely hairy twigs; leaves oblong-lanceo- 

 late to oblanceolate or spatulate, margin entire or slightly wavy toward 

 the tip, revolute, tip rounded or acute, base tapering or rounded, -smooth 

 or slightly hairy above when mature, densely or rarely sparsely white- 

 woolly below, 2-8 cm. long, 1-2^ cm. wide, petioles densely woolly, 3-15 

 mm. long; staminate catkins 1-2 cm. long, 7-8 mm. wide, stamens 2, 

 filaments smooth, pistillate catkins 2-4 cm. long, 1-1 */> cm. wide, capsules 

 ovoid, long-beaked, white-silky ; humilis, on the ground, alluding to 

 the low habit. 



Probably throughout the state; NS-NC-Nebr-Minn. 



Salix rostrata Richardson 1823 Beak Willow 

 Salix bebbiana Sargent 1895 



Shrub, 6-15 ft. high; bark gray, slightly ridged and somewhat scaly; 

 leaves ovate-lanceolate or ovate, margin entire or slightly wavy, tip acute 

 or blunt, base more or less wedge-shaped, somewhat hairy above, more 

 or less densely long white-hairy below, or sometimes nearly smooth in 

 old age, 3-6 cm. long, 1^-2^2 cm. wide, petioles densely hairy, 8-10 mm. 

 long; staminate catkins 3-4 cm. long, 1 cm. wide, stamens 2, filaments 

 smooth, pistillate catkins 5-7 cm. long, \ x / 2 cm. wide in fruit, capsules 

 long-beaked, hairy : rostrata, beaked, in allusion to the long-beaked 

 capsules. 



Throughout the state; Quebec-NY-Nebr-Ariz-Athabasca. 



Malvales Mallow Order 

 Tiliaceae Linden Family 



Trees with alternate simple leaves; flowers perfect in open clusters; 

 sepals 5, petals 5, stamens many, in several groups; ovary 2-10-celled; 

 fruit 1-10-celled, drupe-like or berry-like. 



A family of about 25 genera, found chiefly in tropical and subtropical 

 regions, a few occurring in temperate climates. 



Tilia L i n n e 1753 Basswood, Linden 

 (L. tilia, linden or lime tree) 



Trees with rounded heart-shaped oblique leaves, and cream-colored 

 or yellowish flowers in axillary or terminal clusters, the stalk grown 

 together with a leaf-like bract ; sepals 5, petals 5, narrow and spatulate, 

 often with small basal scales, stamens many, united by the filaments or 



