ROSACEiK. (rose FAMILY.) 157 



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



rui)te(lly piimato, (ho leaHfts \vo(li>;o-«>h()vate ; leaflets of the utim-lcavcs 3-5, 

 rJtombic-ovate or ohlonij, arutr : nrefttdc/e (/uwn//. — Moist meadows, Newf. to 

 N. J., west to Miuu., Kan., and westward. July, Aug. (Ku.) 



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

 cd/i/.r; bractlcts of the cali/x none; otherwise nearlj as § 1. 



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

 few-leaved, slender; root-leaves roundi.sli-hcart-sliaped, 3-5-lol)ed, or some ofi 

 them pinnate, with tlic lobes cut; petals yellow, about the length of the calyx ; 

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



§3. CAKYOPHYLLATA. Stifle jointed and bent in the middle, the upper 

 joint plumose ,- jlowers large ; cali/x erect or spreading ; petals erect. 



6. G. riv^le, L. (Water, or Purple Avens.) — Stems nearly sim- 

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

 those of the stem few, 3-foliolate or 3-lobed ; petals dilated-obovate, retu.se, 

 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 Miuu. and 

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



§ 4. SIEVERSIA. Stj/le not jointed, icholhj persistent and straight ; heaa of 

 fruit sessile ; flowers large; calyx erect or spreading. {Floicering stems 

 simple, and bearing only bracts or small leaves.) 



7. G. triflbrum, 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 ; brarflets linear, longer than the 

 purple calyx, as long as the oblong purplish erect petals: styles very lonq (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 -kid ney-shaped,TA(\\^to-ye\ned (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^ h'gli) 1-5-flowered; bractlefs 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. P6ckii, Gray. Nearly glabrous, or the stalks and veins of the leaves 

 sparsely hirsute. — Alpine tops of the White Mts. 



Drvas octopetala, L., a dwarf matted slightly shrubby ]>lant, with simple 

 toothed leaves and large white s«ditary flowers, has the characters of this sec- 

 tion excepting its S-'J-partod calyx and 8 or 9 petals. It wa.^ said by Pursh 

 to have been found on the White Mountains, X. 11., 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, with 5 often minute and decid- 

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

 Achenes 2-6, minutely hairy; the terminal .slender stales deciduous from the 

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



