ROSACEA, (rose family.) 157 



4. G. Strictum, Ait. Somewhat hairy (3 - 5° high) ; root-leaves inter- 

 (uptedly piuuate, the leaflets wedge-obovate ; leaflets of the stem-leaves 3-5, 

 rhombic-ovate or oblong, acute ; receptacle downy. — Moist meadows, Newf. to 

 N. J., west to Minn., Kan., and westward. July, Aug. (Eu.) 



§ 2. STYLIPUS. Styles smooth ; head of fruit conspicuously stalked in the 

 calyx; bractlets of the calyx none; otherwise nearly as § 1. 



5. G. vernum, Torr. & Gray. Somewhat pubescent ; stems ascending, 

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

 them pinnate, witli the lol)es cut ; petals yellow, about the length of the calyx , 

 receptacle smooth. — Thickets, Penn. to 111., south to Ky. and Tex. April- June. 



§3. CARYOPHYLLATA. Style jointed and bent In the middle, the upper 

 joint plumose ; flowers large ; calyx erect or spreading ; petals erect. 



6. G. rivale, L. f Water, or Purple Avexs.) — Stems nearly sim- 

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

 those of the stem few, 3-foliolate or 3-lobed ; petals dilated-obovate, retuse, 

 contracted into a claw, purplish-orange ; head of fruit stalked in the brown- 

 purple calyx. — Bogs and wet meadows, Newf. to N. J., west to Minn, and 

 Mo. — Flowers nodding ; pedicels erect in fruit. (Eu.) 



§ 4. SIEVERvSIA. Style not jointed, wholly persistent and straight; heaa of 

 fruit sessile ; flowers large; calyx erect or spreading. [Flowering stems 

 simple, and bearing only bracts or small leaves. ) 



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

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

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

 purple calyx, as long as the oblong purplish erect petals; styles very long (2'), 

 strongly plumose in fruit. — Rocks, Lab. and northern N. Eng., to Minn, and 

 Mo.; rare. April -June. 



8. G. radiatum, Michx. Hirsutely hairy or smoothish ; root-leaves 

 rounded-kidney-shaped , TSidiiite-yeined (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 {V long), spread- 

 ing ; styles naked except the base. (High mountains of N. C.) 



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

 sparsely hirsute. — Alpine tops of the White Mts. 



Dryas octopetala, L., a dwarf matted slightly shrubby plant, with simple 

 toothed leaves and large white solitary flowers, has the characters of this sec 

 tion excepting its 8-9-parted calyx and 8 or 9 petals. It was said by Pursh 

 to have been found on the White Mountains, N. H., ninety years ago, but it 

 is not known to have been seen there since. 



8. WALDSTEINIA, Willd. 



Calyx-tube inversely conical ; the limb 5-cleft, witli 5 often minute and decid- 

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

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

 base by a joint. Seed erect; radicle inferior. — Low perennial herbs, with 



