GKUM. ROSACEA. 173 



liquely open on one side. On dry hillsides, southwestern Oregon to Cali- 

 fornia. 



7 GEUM L. Gen. n. 036. 



Perennial herbs with mostly radical lyrate or pinnate leaves, 

 adnata stipules and solitary or corymbose flowers. Calyx ob- 

 conic at base, deeply 5-cleft, usually with 5 bracteoles alternat- 

 ing with the lobes. Petals 5, obtuse or emarginate. Stamens 

 numerous, inserted into the disk that lines the base of the calyx; 

 filamjnts somewhat persistent. Carpels numerous, 1-ovuled, on 

 a dry, conical or clavate receptacle, becoming achenes ; styles 

 terminal, at least the base persistent, stiaight, or geniculate near 

 the middle : stigma simple. Seed erect ; radicle inferior. 



§ 1 EoGEUM T. & G. Fl. i, 420. Flowers erect : segments of 

 the calyx reflexed : head of carpels sessile : styles articulated 

 and geniculate above the middle, the lower portion glabrous, 

 hooked at the apex, persistent after the deflexed and mostly 

 hairy terminal portion falls away. 



G. macrophylluin Willd. Enum. i, 557. Hirsute throughout with 

 spreading yellowish hairs : stems mostly solitary, 1-3 feet high, usually 

 simple : stipules foliaceous, ovate, lacerate serrate, adnate to the petiole 

 below the middle, acuminate above; radical leaves lyrate and interruptedly 

 pinnate, 6-12 inches long or more the terihinal leaflet very large, 

 round-cordate, irregularly lobed and toothed, the others very unequal, often 

 very small ; cauline leaves similar but with a' short rachis or reduced to 

 the terminal leaflet only : flowers yellow, 6-9 lines broad, in an open 

 panicle; bractlets small, often wanting; lobes of the calyx ovate, long 

 acuminate, puberulent or nearly smooth reflexed, about equalling the 

 obovattj or oblong petals : style three lines long, at length reflexed; achenes 

 hispid, upon a nearly naked oblong receptacle. In moist meadows and 

 along streams. Alaska to California and across the continent. 



G. strictuin Ait. Hort. Kew ii, 218. Stems and petioles hirsute or 

 hispid, with spreading hairs: stems stout, 2-3 feet high, simple, dichoto- 

 mous at the summit : radical leaves interrupted and somewhat lyrately 

 pinnate; leaflets cuneiform-obovate, incisely lobed and serrate; cauline 

 leaves 3-5-foliolate; the leaflets rhombic-ovate or oblong, acute, sharply 

 toothed and incised; appressed-pubescent; stipules large, incised : flowers 

 rather large, numerous; bractlets shorter than the calyx-lobes; petals 

 yellow, roundish-oval, longer than the calyx:, carpels hispid at the apex; 

 style glabrous, the upper joint hairy: receptacle densely pubescent. In 

 fljids and moist places, Idaho to the New England States and Canada. 



§ 2. SiEVERSiA Willd. Berl. Ma^. v, 393 as genus. Flowers 

 rather large, erect ; segments of the calyx erect or spreading : 

 head of carpels sessile: style wholly persistent.- 



(jr. trifloruni Pursh Fl. 736. Villous and hirsute: stems clustered, 

 from stout branching rootstocks, 6-15 inches high, siihple, nearly naked : 

 radical leaves pinnate, with numerous cimeate-oblong irregularly incised 

 leaflets : the cauline reduced to a few small linear-lobed leaves or bracts : 

 flowers few, usually 3, on long peduncles ; calyx often purplish, the linear 

 bractlets 4-9 lines long usually exceeding the calyx-lobes and equalling 

 the oblong purpli^ erect petals : tails of the small achenes plumose, at 

 leiigth 2-3 inches long: receptacle small, hemispherical; On bleak hill- 

 tops, from Arctic America to California and the Rocky Mountains. 



