273. SALIX FLUVIATILIS SAND-BAR WILLOW. 47 



former represented by a gland-like cup; ovary 1 to 2-celled; styles wanting, or 2 and 

 short; stigmas often 2-lobed. Fruit a 1 or 2-celled, 2-valved capsule, with numerous seeds 

 springing from two parietal or basal placentae and furnished with long, silky down; seeds 

 ascending, anatropous, without albumen; cotyledons flat. 



Trees or shrubs of rapid growth, light wood and bitter bark. 



GENUS SALIX, TOUBN. 



Leaves generally narrow, long and pointed and usually with conspicuous stipules ; bud 

 scales single. Flowers appearing before or with the leaves in terminal and lateral 

 cylindrical, imbricated catkins, the scales or bracts of which are entire and each sub- 

 tending a flower, which is without calyx, and bears at its base 1 or 2 small nectiferous 

 glands. Sterile flowers with 2 (but sometimes more) distinct or united stamens. Fertile 

 ftowers ovary ovoid lanceolate, taper-pointed: style short: stigmas 2, short and mostly 

 bifid. Fruit a 1-celled capsule, dehiscent at maturity by two valves which roll back to the 

 base to liberate the numberous minute comose seeds. 



Trees and shrubs with lithe round branches and growing mostly along streams and in 

 moist localities. (Salix is from the Celtic sal, near and Us, water, alluding to the favorite 

 locality of the willows. ) 



273. SALIX FLUVIATILIS, NUTT. 

 SAND-BAR WILLOW. LONG-LEAF WILLOW. 



Ger., Langbldttrige Weide. Fr., Saule de Longefeuille. Sp., Sauce de 



Hojas Largas. 



SPECIFIC CHARACTERS : Leaves involute in the bud, linear-lanceolate, 2-6 in. long, 

 gradually tapering to both ends, remotely dentate with small glandular spreading teeth, 

 glabrous, pubescent, yellowish green; stipules small, deciduous; petioles short and not 

 glandular. Flowers (April-May) aments on terminal short leafy branchlets, often branch- 

 ing, with pubescent peduncles or from axillary buds of same branchlets; scales light yellow, 

 villous ; stamens 2 with filaments slightly hairy at base ; ovary short-stalked with large 

 sessile lobed stigmas. Fruit capsules narrow-ovoid, glabrate. 



A small tree, occasionally attaining the height of 60 ft. (18 m.), with 

 slender upright branches, and trunk 2 ft. (0.60 m.) in diameter, but such 

 dimensions are rare. It is usually a much smaller tree, or covers large areas 

 as only a shrub. The bark of trunk is thin, of a dark reddish brown color 

 and quite smooth, or slightly fissured into low, longitudinal ridges. 



HABITAT. A species of very wide distribution, being found from western 

 Xew England and the vicinity of Quebec, across the continent to the Pacific 

 coast, and from the valley of the Mackenzie "River above the Arctic circle, 

 southward to northern Mexico.. It inhabits the banks of streams, and is 

 abundant in the valleys of many western streams. 



