338 Obder 47. — ROSACEA. 



» 



§ Style straight, jointress, all of it persistent. Sieversia Nos. 1, 3 



§ Stylo bent and jointed in the middle, hooked or plumose, (a) 



a ilead of fruits raised on a stipe. FJs. yellow or purple Nos. 3 — 5 



a Head of fruits sessile (no stipe). — Fls. yellow Nos. 6, T 



— Flowers white No. 8 



1 G. trifldrum Pursh. Villous; st. erect, about 3-flowered; lvs. mostly radical, 

 interruptedly pinnate, of numerous cunoate, iucisely dentate, subequal lfts. ; 

 bracilets linear, longer than the sejials ; sty. plumous, very long in fruit. — Brit. 

 Am. and N. W. States, rare in the Northern. Sts. scarcely a foot high, with a 

 pair of opposite, laciniate lvs. near the middle, and several bracts at the base of tho 

 long, slender petioles. Radical lvs. 5 to 6' long, the terminal lit. not enlarged. 

 Fls. rather large, purplish white. Sty. 2' long in fruit. May, Jn. 



2 G. Peckii Pursh. Nearly glabrous; st. erect, several-flowered, nearly naked; 

 radical lvs. lyrate-pinnate ; the terminal 1ft. very large, truncate at base, the lateral 

 ones minute ; pet. obovaie, much longer than tho cal. — White Mts. Scape 9 to 

 15' high, with several small, incised bracts. Petioles 3 to 5' long, bearing 4 or 

 5 dentate, lateral lfts. 1 to 4" long, and ending in a half round 1ft. 2 to 4' wide, 

 lobed and dentate. Fls. 8'' diam., yellow, terminal on tho elongated branches. 

 JL, Aug. 



3 G. radiatum Mx. Very hairy, hispid; st. leafy, 5 to 10-flowered ; rt. lvs. 

 lyrate-pinnate, the terminal Ifl. very large, broadly reniform-cordate, incised, the 

 lateral ones very small ; st. lvs. sessile, cleft; and toothed ; petals obcordate ; sty. 

 persistent, much longer than cal. in fruit. — Roan Mt. N. Car. (Curtis). Sts. 1 to 

 2f high, bearing a spreading panicle of large, yellow fls. 



4 G. vernuni Torr. & Gr. Slender and slightly pubescent; st. ascending at base ; 

 radical lvs. pinnately 5 to 9-fbliate, with incised lfts. or often simple and cordate, 

 incisely lobed and dentate ; cauline lvs. 3 to 5-foliato or lobed ; stip. large and 

 incised I; fls. yellow, erect, very small; sep. reftexed; head of carpels globous, raised 

 on a slender stipe. — Shades and thickets, Ohio to 111. and Tex. St. 8 to 20' high, 

 striate, di- or trichomotous at top, few-leaved and few-flowered. Petals yellow 

 and with the sepals hardly more than 1" in length. Stipe of tho head of carpels 

 i' long. Apr. — Jn. (Stylipus vemus Raf.) 



5 G rivale. L. Pubescent ; st. subsimple ; radical lvs. lyrate ; stip. ovate, acute ; 

 fls. nodding, purple; j)et. as long as the erect cal. segm. ; upper joint of tho persis- 

 tent style plumous. — A fine plant, conspicuous among tho grass in wet meadows 

 N. and M. States. Rhizome woody, creeping. St. 1 to 2f high, paniculate at 

 top. Root lvs. interruptedly pinnate, inclining to lyrate, 4 to 6' long, terminal 

 lft. large, roundish, lobed and crenate-dentate. St. lvs. 1 to 3, 3-foliate or lobed, 

 eubsessilo. Fls. subglobous. Cal. purplish-brown. Petals broad-obcordate, 

 clawed, purplish-yellow, veined. Jn. — The root is aromatic and astringent. 



6 G. strictum Ait. Hirsute; radical lvs. interruptedly pinnate ; cauline 3 to 5- 

 foliate; lfts. obovate and ovate, lobed and toothed; stip. largo and erect; bract- 

 lets linear, shorter than the Sep.; pet. roundish, longer than tho cal. ; sty. smooth, 

 upper joint hairy. — Fields, moist or dry, N. States and Brit. Am. St. hispid at 

 base, 2 to 3f high, dichotomous, and with spreading hairs at summit. Rt. lvs. 5 

 to 8' long, inclining to lyrate, the terminal lft. largest, obovate and lobed. Fls. 

 numerous, rather large, yellow. Receptacle densely pubescent. J1-, Aug. 



7 G. macrophyllum Willd. Hispid; radical lvs. interruptedly lyrate-pinnate, 

 the terminal lft. much the largest, roundish-cordate, cauline with minute lateral lfts., 

 and a large, roundish, terminal one, all unequally dentate ; petals longer than the 

 calyx; recept. nearly smooth. — White Mts. and Brit. Am. St. 1 to 2f high, 

 stout, very hispid and leafy. Terminal lft. 3 to 5' diam. Fls. yellow. Jn., JL 



8 G. Virginianum L. Pubescent ; radical lvs. pinnate, ternate or even rarely 

 simple, cauline 3 to 5-foliate or lobed, all unequally and incisely dentate, nearly 

 smooth or softly pubescent ; fls. erect ; petals not exceeding the calyx ; sty. gla- 

 brous; recep. densely hirsute. — Hedges and thickets, Can. and U. S. St. simple 

 or branched, smoothish above. Lvs. very variable in form, lower ones often 3- 

 foliate, with long (6 to 8') appendaged petioles. Stip. mostly incised. Upper lvs. 

 ample, acute, sessile. Fls. rather small, white. Ped. in fruit long and diverging. 

 JL G. album Gmel.) 



