POLYANDRIA.— POLYGYNIA. 227 



9. R. mukifidus : floating ; leaves all cleft into nume- 



rous capillary segments, with axillary leaflets ; pe- 

 tals 5 — 8, obovate, twice as long as the calyx ; nec- 

 tary concave. 

 HAB. Stagnant waters. May — June. U. Stem 

 3 — 4 ft. long ; fl. large, shining. 



10. R. acris : leaves mostly pubescent, 3-parted ; lobes 

 incisely toothed, acute ; upper ones linear ; stem 

 erect, many-flowered ; peduncles not sulcate ; ca- 

 lyx spreading, subvillous. 



HAB. Wet meadows. June. U . Stem 2 ft. high, 

 pubes. ; fl. large; cal. reflex. §. 



11. R. hispidus : erect, branched; stem and petioles 



with stiff spreading hairs ; leaves ternate ; leaflets 

 acutely lobed ; pubescence of the pedicels ap- 

 pressed ; calyx appressed. 

 HAB. Wet places. May. 1/. Stem 11 ft. high, 

 "very hairy ; fl. large. 



12. R. recurvaius : erect; stem and petioles with 



spreading hairs ; leaves 3-parted, hairy ; segments 

 broad-oval, subincised ; the lateral ones 2-lobed ; 

 calyx reflexed ; petals lanceolate ; pericarps unci- 

 nate. 

 HAB. In woods. May — July. U . A foot high ; 

 leav. subpentang. ; fl. very small. 



13. R. pennsylvanicus : erect; stem and petioles very 



hairy ; the hairs rigid and spreading ; leaves 

 ternate, villous ; segments subpetiolate, acutely 

 3-lobed, incisely serrate ; calyx reflexed ; peri- 

 carps with a straight style. 

 HAB. Wet meadows. June— Aug. n.? Stem IK 

 in. high; branch. ; fl. large ; fr. in obi. heads. 



14. R. fascicularis : erect, branched; leaves pubes- 



cent, ternate ; the middle segment deeply 3-cleft ; 

 lateral ones remotely 3-lobed ; calyx spreading, 

 villous, shorter than the petals. 

 1IAB. Rocky woods. April — May. %. Root fas - 

 cic.;fl. large; nect.flat, cuneif. 

 15 R. bvlbosus : hairy ; radical leaves ternate ; leaflets 

 petiolate, 3-cleft, incisely dentate, stem ererl 

 bulbous at the base ; calyx reflexed ; pedtmclej 

 sulcate. 



