502 CXXVII. SALICACEiE. Salix 



Uavcs, centrifugal. Scales turning black. Stamens 2, free or united. Ova. stipi- 

 tate, S'ubpubescent. Barratt. 



4. S. DISCOLOR. Muhl. Two-colored or Bog Willow. 



Lvs. oblong, rather acute, glabrous above, entire at the end, glaucous 

 beneath ; slip, lanceolate, serrate, deciduous ; aments cotemporary with the 

 leaves, oblong, down}', diandrous ; scales oblong, acute, black, hairy ; ova. ses- 

 sile, downy ; stig. 2-parted.— A shrub, 8— lOf high, in swampy grounds, Can. to 

 Car., with tough brown twigs, and white, glossy catkins. Leaves 1—3' long, 

 finely serrate except at the end. Sterile aments about f long, fertile 1'. Fila- 

 ments white, anthers at length yellow. April. 

 /?. Monadelphia. Barratt. Tree 10 — 15f high. Filaments 3 — 4, half-united. 



5. ERiocEPHALA, Michx. Woollij-headed Swamp Willow.- 



Branchlets very pubescent, brown or purplish ; Ixs. lanceolate-elliptic or 

 oblong, cuneate at base, entire or remotely serrulate above, under surface glau- 

 cous or ferruginous, both surfaces pubescent when young, at length the upper 

 surface green and nearly smooth; slip, semicordate, with sharp serratures; 

 aments oval-oblong, densely villous. — A small tree, putting forth its large and 

 exceedingly woolly catkins in April. Grows in swamps, N. Eng. 



6. S. PRiNolDES. Ph. Prinos-leaved Willow. 



Branchlets puberulent when young, at length glabrous and dark brown ; 

 lvs. oval-oblong or lance-oblong, glabrous, glaucous beneath, cuneate at base, 

 remotely serrulate, acute or abruptly acuminate; slip, semicordate, incisely 

 serrate; a/n€?«^s preceding the leaves, hairy; ova. ovoid, acuminate, silky; sty. 

 long ; stig. bifid.— Shrub 6— 8f high, N. Eng. to Penn., W. to Mich. Catkins 

 appearing in April, 1 — 2' long. Ovaries distinctly stipitate, tapering at apex 

 into the long, exserted style. 



7. S. CRASSA. Barratt. Dense-flowered Early Willow. 



Lvs. elliptic-lanceolate, rather remotely serrate, entire towards the base, 

 glabrous and dull green above, veiny and clothed with short, ferruginous hairs 

 beneath, adult subcoriaceous ; slip, small, lanceolate, serrate or otten wanting; 

 (^ aments ovate, sessile, densely clothed with yellowish-white, silky hairs ; scales 

 obovate. — A hairy and beautitul willow, rare in N. Eng. Tree about 15f high, 

 with rough, ash-colored bark. Branches irregular and knotty, with thick, 

 densely flowered twigs in April. Leaves 3j' by 1'. (^catkins 1 — 2' long. 



8. S. sENsiTlVA. Barratt. Frost or Tender Willow. 



Lvs. ovate-lanceolate, acuminate, cuneate and entire at base, finely serrate 

 at the apex, and more distantly and strongly serrate towards the base, glabrous 

 and rather thin ; stip. subfalcate, serrate ; g" aments rather lax ; scales rather lax, 

 lightly clothed with grayi.sh-black hairs. — A small tree, about 15f high, found 

 in various parts of N. Eng., &c. The aments and twigs are frequently destroy- 

 ed bv trost at flowering-time, being thinly protected Avith hairs. Leaves smooth, 

 3 — 5' by U— 2'. Aments U' long. Apr.— This and the three next preceding 

 species are very closely allied, as suggested by Mr. Emerson, Rep., p. 262, and 

 it is possible that they may hereafter be united under one species. 

 § 3. Gkise;e. Borrer. Shrubs vitk branches brittle at base, and an intensely bitter 



bark. Leaves lanceolate, serrate, grayish-silky beneath, turning black in drying. 



Aments cylindrical, rather short, preceding the leaves, with 2 or 3 minute leaves at 



base. Stamejis 2, beginning to 'appear from, the middle of the ament. OvaTries 



grayish- silky. Barratt. 



9. S. G RISE A. Gray Willow-. 



Lvs. lanceolate, serrulate, acuminate, smooth above, silky beneath ; stip. 

 ovate-oblong, denticulate, deflected, deciduous; scales oblong, hairy, black at 

 the tip ; ova. oblong, pedicellate, silky ; sfig. sessile, obtuse. A shrub 6 — 8f 

 high, in inundated meadows. Branches purplish, long and .slender, very tough, 

 except at the base, where they are very brittle. Leaves 2 — 4' by ^ — 1' 9 aments 

 very abundant, i' long. Apr. 



10. S. PETioLARis. Smith. Long-sfalked Green Osier. 



Lvs. lanceolate, serrate, smooth, glaucous beneath, silky at base, mostly 

 unequal, stipules lunate, dentate ; aments appearing before the leaves; scales lax, 

 obovate, obtuse, hairy, black ; ova. on long pedicels, ovate, silky ; slig. sessile, 



