ROSACEA. (ROSE FAMILY.) 117 



§2. STYLIPUS, Raf. — Styles smooth: head of fruit conspicuously stalked tn the 

 calyx : bractlets of the calyx none : otherwise as $ 1 . 



5. G. vernuilJ, Torr. & Gr. Somewhat pubescent; stems ascending, 

 few-leaved, slender ; root-leaves roundish-heart-shaped, 3 - 5-lobed, or some of 

 them pinnate, with the lobes cut ; petals yellow, about the length of the cab x ; 

 receptacle smooth. — Thickets, Ohio to Illinois and Kentucky. April -June. 



§ 3. CAR YOPHYLL ATA, Toura. — Style jointed and bent in the middle, the 

 upper joint plumose : flowers large : calyx erect or spreading : petals ei-ect. 



6. G. rivale, L. ("Water or Purple Avens.) Stems nearly simple, 

 several-flowered (2° high) ; root-leaves lyrate and interruptedly pinnate ; those 

 of the stem few, 3-foliolate or 3-lobed ; petals dilated-obovate retusc, contracted 

 into a claw, purplish-orange; head of fruit stalked. — Bogs and wet meadows, 

 N. England to Wisconsin and northward. May. — Blossoms nodding, but the 

 feathery fruiting heads upright. Calyx brown-purple. (Eu.) 



§4. SIEVERSIA, Willd. — Style not jointed, wholly persistent and straight : head 

 of fruit sessile : flowers large : calyx erect or spreading. ( Flowering stems simple, 

 and bearing only bracts or small leaves. ) 



7. G. trifldrtim, Pursh. Low, softly hairy; root-leaves interruptedly 



pinnate ; the leaflets very numerous and crowded, oblong-wedge-form, deeply 

 cut-toothed ; flowers 3 or more on long peduncles ; bractlets linear, longer than the 

 pwyle calyx, as long as the oblong purplish erect ]>eta!< ; styles very long (2'), strongly 

 plumose in fruit. — Rocks, New Hampshire and N. New York northward to 

 Wisconsin; rare. April -June. 



8. G. ratfiiktllill, Michx. Hirsutcly hairy or smoothLsh ; root-leaves 

 rounded-kidney-shaped, radiate-veined (2' -5' broad), doubly or irregularly cut- 

 toothed and obscurely 5 - 7-lobed, also a set of minute leaflets down the long 

 petiole; stems (8'- 18' high) 1-5-flowered; bractlets minute ; petals yellow, round- 

 obovate and more or less obcordate, exceeding the calyx (i' long), spreading ; 

 styles naked except the base. (High mountains of Carolina.) 



Var. Pecliii. Nearly glabrous, or the stalks and veins of the leaves 

 sparsely hirsute. (G. Peckii, Pursh.) — Alpine tops of the White Mountains of 

 New Hampshire. July - Sept. 



10. WALDSTEINIA, Willd. (Comaropsis, DC.) 



Calyx-tube inversely conical ; the limb 5-clcft, with 5 often minute and decid- 

 uous bractlets. Petals 5. Stamens many, inserted into the throat of the calyx. 

 Achenia 2-6, minutely hairy ; the terminal slender styles deciduous from the 

 base by a joint. Seed erect. — Low perennial herbs, with chiefly radical 3-5- 

 lobed or divided leaves, and small yellow flowers on bracted scapes. (Named 

 in honor of Francis von Waldstein, a German botanist.) 



1. W. fragarioides, Tratt. (Barren Strawberry.) Low; leaf- 

 lets 3, broadly wedge-form, cut-toothed ; scapes several-flowered ; petals longer 

 than the calyx. (Dalibarda fragarioides, Michx.) — Wooded hill-sides, common 

 northward, and southward along the Alleghanies. 



