SALICACEAE ^WILLOW FAMILY) 



325 



656. S. Uva-ursi. 



657. S. herbacea. 



** ++ Prostrate or creeping and matted alpine shrubs. 



17. S. Uva-ursi Pursh. Leaves elliptical and pointed, orobovate and obtuse, 

 0.5-2.5 cm. long, tapering at base, sliglitly toothed, strongly veined, smooth and 



sliining above, pale and rather glaucous beneatli ; aments borne 

 on slendur lateral leafy pec?««c/es, thick-cylindric, the fertile 

 lengthening to 2 or 3 cm. and becommg narrowly cylindric, 

 densely Jloicered above, often loose below ; scales obovate, rose- 

 red at the tip, covered with long silky hairs; 

 stamen 1 (rarely 2); capsule ovoid-conical, 

 brownish at maturity ; pedicel scarcely 

 exceeding the gland ; style distinct. — Lab. 

 to Alaska, s. to alpine summits of n. N. E. 

 and N. Y. — Closely prostrate, spreading 

 from a stout central root over an area 3-9 

 dm. broad. Eig. ()o6. 



18. S. herbacea L. Leaves roundish oval, heart-shaped, 

 obtuse or retuse, 1-3 cm. long, serrate, smooth and shining, 

 reticulately veined ; aments terminating 2-leaved branchlets, 

 small, ovoid, -i-lO-Jfoicered ; scales conc&xe. obovate, obtuse, 

 glabrous or slightly pubescent ; capsule subsessile. — Arctic 

 Am., s. to alpine regions of Mt. Katahdin, Me., and Mt. 

 ^Vashington, N. H. — A very small herb-like species, the 

 half-underground stems creeping and rooting in moss or 

 humus, the branches seldom rising 0.5 dm. from the ground. (Eu.) Fig. 657, 



-s- -1- Capsule pubescent. 



•*-*■ Fruiting pedicel 3-6 times the length of the gland ; style short or none (elon- 

 gate in no. 25). 



= Mature leaves glabrous or glabr ate beneath, or at most with a few scattered 

 hairs. {Extreme forms ofS. rostrata may be looked for here.) 



a. Aments sessile on the old loood, naked at base, appearing before the leaves ; 

 scales dark red, brown, or blackish; mature capsidel-V2 mm. long. 



10. S. discolor Muhl. (Glaucous \Y.) Leaves lanceolate to elliptic, smooth 

 and bright green above, soon smooth and glaucous beneath, irregularly crenate- 

 serrate, the serratures remote at ba.se, closer, finer and becom- 

 ing obsolete toward the point ; stipules 1 cm. or more long and 

 sharply toothed, or small and nearly entire ; aments thick, 

 cylindrical, l.b-l cm. long, appearing in earliest spring ; scales 

 copiously clothed icith long glossy hairs; style short but 

 distinct. Fig. 658. Yar. eriocephala (Michx.) Anders. 

 Aments more densely flowered and more silvery-silky ; leaves 

 sometimes retaining a ferruginous pubescence beneath even 

 when fully grown. {S. eriocephala Michx.) Yar. prixoides 

 (Pursh) Anders. Aments more looselj'^ flowered, less silky; 

 capsules more thinly tomentose ; style longer ; stigma-lobes 

 laciniate ; leaves narrower. (,S'. prinoides Punsh.) 

 Includes narrow-leaved forms of the type, and 

 others which are probably hybrids with S. cor- 

 data. — Large shrub or small tree of low mead- 

 ows and river-banks, coitnnon. — The just 

 expanding leaves are often overspread with evan- 

 escent ferruginous hairs. 



discolor. 



b. Aments short-stalked, leafy-bracted at base, 

 appearing with the leaves ; scales pale brown 

 or yellowish; mature capsule 4-6 mm. long. 



20. S. petiolaris Sm. Leaves narrowly lanceolate, taper- 

 pointed, finely and evenly serrate, slightly silky when young, 

 soon smooth ; stipules linear or semicordate, deciduous ; fertile 659. S. petiolaris 



