long, ascending, scarcely 



432 ROSACEAE 



G. rivale X stxictum. With the habit of G. striclum, but differing in the petals, 

 which are golden-yellow, obcordate, clawed at the base and emarginate at the apex, 

 longer than the reflexed sepals; the basal leaves are those of G. rivale. G. aurantiacum 

 Fries. B.C.— Alta. — n N.Y. 



u 



■m 



27. SIEVERSIA Willd. Old Man's Whiskers. 



Perennial herbs, with rootstocks or suffruticose bases. Basal leaves usually 

 numerous, lyrately or odd-pinnately divided, usually with smaller segments 

 interposed between the larger ones; stem-leaves usually reduced; stipules usually 

 large, adnate to the petioles. Flowers solitary or corymbose-cymose. Hypan- 

 thiiun turbinate or hemispheric. Bractlets usually present. Sepals 5, valvate. 

 Petals 5, white, light yellow, pinkish, or purplish. Stamens many, inserted on 

 a disk in the mouth of the hypanthium. Pistils numerous, inserted on a short 

 carpophore. Styles not articulate or obsoletely so, the lower portion plumose, 

 elongate in fruit, not at all hooked or rarely sKghtly so, the upper portion glabrous, 

 persistent or withering and then deciduous, but not falling oil early at a distinct 

 node. Fruit a hairy achene. Seed erect, basal. [Erythrocoma Greene.] 



Leaflets cimeate, toothed at the apex. 



Hj-panthium at least in flower acute at the base; bractlets much exceeding the lance- 

 olate sepals; petals elliptic. \ i triflora 



Hypanthiu^i ^!?,,^^^'£^ rouiided or sunken at the base; bractlets about equalling or 



shorter than the ovate or ovate-lanceolate sepals; netals brondlv pUintic 

 Bractlets linear or linear-subulate, equalling the sepals or slightly eLS 



Bractlets oblong-Unear or lanceolate, shorter than the senaTs ^ S* nmescens. 



Leaflets dissected at least half way into linear or linear-lanctolTte divisions ^"'''''''" 

 "unled ^''^^' *^'''' ^^^ ^^^^^* h3-pantliium and sepals usually strongly, purple- 

 ^"'"''^^tlTX^nS^ the sepals; hypanthium and sepals yellowish and Sily^l&tly 



Leaflets, except in depauperate soecimens, 2-4 cm 



glandular. -■ K~'ii"iinruln 



^^"KiJr ^^"^ ^^ ''°'- ^°''^' ^P^'^^^^g- conspicuouslj glandullr-pruinose and 



^'''^- 6. S. brevifolia. 



1. S. triflora (Piush) R. Br. Stem finely pilose and somewTiat hirsute 2-4 

 dm. high, cymosely 3-flo wered ; basal leaves 1-2 dm. long- prSalleaflets 7-15, 

 at the apex 2- or 3-clef t less than half their length, finely pXruT„tWp'^^^^ 



2. S. grisea (Greene) Rvdb. Stem 2-3 dm hiVf. ^„ ^ a- a ^iin^sp 

 throughout basal leaves 5^15 cm long; prin^i^" l^A Si'Sl^of o Jv£ 

 cuneat^e, 1-2 cm. long, pilose on both sides, yellowish grL^ usuX 3-olcft to 

 near the middle and again toothed; bractlets linear-snhnlot ' ^ l\ i^ntr- 

 hypanthium hemispheric or slightly sunken at the Se^in'^'^H """>.! Tmov 

 rose; sepals triangular-lanceolate or lance-ovate tfet.k^ir.?'^ ""'l^ scarlet or 

 late, about equalling the bractlets. ^rXcomrirla '^p^'^ ""' obl^^g^t t 

 dcntata, and E. aliena Greene. Mountains: M^nt ^wSh n^^^'^l^'^M^rh - 

 huahtia. Submont.—Mont. My-Jl. VVash.— Ore.— ^.M.; Chi 



3. S. canescens (Greene) Rydb. Stem 2-4 dm hiorl, si -t *i, „n-^ 

 out, usually 3-flowered; basal leaves S^15 cm lJm.r u 'a^^'^^P'^''^^ through- 

 1-2.5 cm. long, densely pilose and ciliate on the ma?.fini o"" J**^ pbovate-cuneate, 

 toothed or sometimes merely 3-5-toothed at the^oex hr'J,':""'';',"'^^-?-"^^ ^nr 

 lanceolate, 6-8 mm. long; hypanthium-hemispheric or'«, T'^^^ oblong-lmear or 

 broadly ovate-lanceolate or ovate, acut^ peta^'^L,^'^"'^"^" a* VA^ b^s^i s«P^^ 

 shghtly exceeding the sepals. Scarcely aistineffrom thf '^ ""l e"^Ptic-«bovate, 

 Greene. Mountams: Wash.--Ida.--Cahf. » Sw/^ ^''^''^'*'"S- E. canescens 



. 4. S. ciliata (Pursh) G. Don. Stem 2-5 dm hi^li fi i •, ^ -i.,,, 



hn-sute, cjTOosely 3-15-flowered; basal leaves 1 2 .1^' i ^^^ I^'^^^® ^^^, a I' 

 9-19, obovate in outline, finely pilose-puberulent La ^^^'' Principal leaflets 

 ciliate on the veins and margins; bractlets linear^lf^T °^ ^^^^ densely silky- 



ovate-lanceolate; petals broadly eUiptic or ov-Tl a u ^' ^^P^^^ ^^^'^^ P^^'?^^ 



•^ i^ <- or oval, flesh-colored or yeUowish. 



