ROSE FAMILY 431 



dentate, those of the later usually ternate, with rhombic or obovate leaflets; 

 upper stem-leaves often simple and subsessile, ovate, acute, and 3-lobed; petals 

 white, elliptic or oblong, seldom exceeding the sepals; fruiting head 10-12 mm. 

 in diameter. Gciun alhuin J. F. Gmel. Banks and among bushes: N.S. — Ga. — 

 Tex. — S.D.; Mex. Plain. Je-S. 



2. G. decurrens Rydb. Stem more or -less pubescent, but not conspicu- 

 ously hirsute; basal leaves and lower stem-leaves interruptedly pinnate, sparingly 

 pubescent; leaflets 5-9, oblanceolate to obovate, 1-5 cm. long, cleft and more or 

 less doubly toothed; upper stem-leaves ternate and short-petioled ; sepals tri- 

 angular-lanceolate, 5-6 mm. long; petals orbicular or broadly oval, about 6 mm. 

 long. Mountains: Ariz. — N.M. — Colo. Suhmont. — Mont. .11. 



3. G. strictum Soland. Stem 5-15 dm. high, strongly hirsute; basal leaves 

 interruptedly lyrate-pinnate; principal leaflets 5-9, cimeate, obovate, or on the 

 young shoots the terminal leaflet rounded or reniform, 2-10 cm. long, cleft or 

 divided and doubly toothed; uppermost stem-leaves 3-foliolate and short-peti- 

 oled; petals orbicular, 5-8 mm. long, bright yellow; fruiting head 15-18 mm. 

 in diameter. G. scopulorum Greene. Low meadows: Newf. — Pa. — Mo. — Ariz. — 

 B.C.; Mex. Plain — Siibmont. Je-Au. 



4. G. macrophyllum Willd. Stem very hirsute, especially below, with 

 yellowish hairs; basal leaves interruptedly lyrate-pinnate; principal leaflets 

 5-15, the terminal one reniform or rounded, often 3-lobed, 5-10 cm. broad, the 

 lateral ones obovate or rounded, 1-5 cm. long, hirsute on both sides, doubly 

 toothed; petals bright yellow, obovate or obcordate, 4-7 mm. long; fruiting head 

 15-18 mm. in diameter. Wet meadows: Newf. — N.H. — Mont. — Calif. — Alaska; 

 e Siberia. Submont. — Mont. My-Au. 



G. macrophyllum X strictum. With the habit and leaves of G. macrophyllum, 

 but the stem less leafy and the petals broad and rounded at the base as in G. strictum. 

 Mont. 



5. G. oregonense (Scheutz) Rydb. Stem 4-7 dm. high, densely hirsute, 

 with yellowish haii's; basal leaves interruptedly lyrate-pinnate; principal leaf- 

 lets 5-9; terminal leaflet reniform or rounded, 5-10 cm. broad, doubly dentate; 

 lateral leaflets obovate or cuneate, 1-5 cm. long, more or less hirsute on both 

 sides; upper stem-leaves small, usually ternate or 3-cleft, with obovate or ob- 

 lanceolate divisions, or simple; petals pale yellow, 4-5 mm. long, obovate; fruit- 

 ing head about 15 mm. in diameter. G. urbanum oregonense Scheutz. Meadows: 

 Mack.— Minn.— N.M.— Calif.— B.C. Submont.— Mont. My-S. 



G. macrophyllum X oregonense. With the more numerous and smaller flowers 

 of G. oregonense and the long yellow pubescence characteristic of that species, but the 

 stem more leafy and the ui)per stem-leaves with the broad lobes characteristic of G. 

 macrophyllum. Wyo. — Mout. — B. C. 



G. oregonense X strictum. Resembling G. oregonense in habit, leaf -form, long yeUow 

 pubescence, and structure of the styles, but more robust and with the broad, large, 

 rounded petals of G. strictum. Utah — Mont. 



6. G. perincisum Rydb. Stem strict, 4-6 dm. high, conspicuously hirsute, 

 w'ith divaricate hairs; basal leaves interruptedly pinnate; principal leaflets 5-11, 

 1-6 cm. long, obovate or rhombic-obovate, or the terminal one ovate or cordate 

 and then deeply 3-cleft, all cleft and incised; upper stem-leaves 3-foliolate; leaf- 

 lets oblanceolate; petals i)ale yellow, oval or obovate, about 5 mm. long. Mead- 

 ows: Mack. — Mich. — Alta. — Yukon. Subalp. — Mont. Je-Jl. 



7. G. rivale L. Stems 3-6 dm. high, simple, more or less hirsute; basal 

 leaves lyrate-pinnate; leaflets obovate or cuneate or the terminal one rounded 

 or reniform, 2-10 cm. long, bidentate or biserrate; stem-leaves ternate, with 

 oblanceolate or obovate leaflets; ])etals flesh-colored or sometimes tinged with 

 j^ellow, purple-veined, clawed, flabelliform, emarginate, 7-10 mm. long. In 

 ■swamps and low ground: Lab. — Newf. — N.J. — ^AIo. — N.M. — B.C.; Eurasia. 

 Plain — Subalp. My-Au. 



G. macrophyllum X rivale. Resembling G. rivale in habit and foliage, but the 

 flowers sniallcf and more numerous, tlie sepals widely spreaditig or somewhat reflexed, 

 and the petals t^oldon-yellow, obovate, and less clawed. G. pulchrum Ferna,\.d. Que. — • 

 Yt. — Alta. 



