POLYANDRIA POLYGYNIA. 



HAB. Swamps. June July, 'ZJ. ; stem 12 18 in. high, suctnii. 



R. reptans: b. filiformis: leaves linear-subulate; stems filiform, 



creeping, geniculate ; joints 1-flowered. 

 HAB. River banks. July Aug. ^ ; stems 6 10 in. long ; Jl, 



small -Jr. very smooth. 



t t Leaves divided. 



R. abortivus : leaves smooth ; radical ones petiolate, cordate-orbicular, 

 crenate ; stem leaves ternate and 3-clefl, with linear segments ; ca- 

 lyx smooth, a little longer than the petals. 



HAB. Rocky woods. April June, ^ ; a foot high ; JL. small ; fr. 

 ovate, compress. 



R. sceleratus : leaves smooth ; radical ones petiolate, 3-parted ; divis^ 

 ions 3-Iobed, obtuse, subincised ; superior 3-parted, with oblong 

 linear entire lobes ; calyx pubescent ; fruit linear-oblong. 



HAB. Ditches, &c. May Aug. 7J. ; a foot high, much branch. 

 stem succul. ; Jl. small. 



R. multifidus ; floating ; leaves all cleft into numerous capillary seg- 

 ments, with axillary leaflets ; petals 5 8, obovate, twice as long, as 

 the calyx ; nectary concave. 



HAB. Stagnant waters. May June, 7J_; stem 3 4 feet long -Jl. 

 large, shining. 



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

 acute ; upper ones linear ; stem eroct, many-flowered ; peduncles 

 not sulcate; calyx spreading, subvillous. 



HAB. Wet meadows. June, Ij.; stem 2 feet high, pubes. ; Jlowers 

 large; cal.re.Jlex. . 



R. hispidus : erect, branched ; stem and petioles with stiff spreading 

 hairs ; leaves ternate ; leaflets acutely lobed ; pubescence of the 

 pedicels appressed ; calyx appressed. 



HAB. Wet places. May, QJ.J stem \\fett high, very hairy Jl. 

 large. 



R. recurvatus: erect; stem md petioles with spreading hairs ; leaves 

 3-parted, hairy ; segments broad-oval, subincised ; the lateral ones 

 2-lobed ; calyx reflexed ; petals lanceolate ; pericarps uncinate. 



HAB. In woods. May July, 1\. ; a foot high,; leaves subpentar\,g. 

 -Jl. very small. 



R. fascicularis : erect, branched ; leaves pubescent, ternate ; the mid- 

 dle segment deeply 3-cleft ; lateral ones remotely 3-lobed ; calyx 

 spreading, villous, shorter than the petals. 



HAB. Rocky woods. Apr. May, 1\. ; rootfascic. ; Jl. large ; nect 

 Jlaf, cuneif. 



R. bulbosus : hairy ; radical leaves ternate ; leaflets petiolate, 3-clrft, 

 incisely dentate, stem erect, bulbous at the base ; calyx reflexed ; pe- 

 duncles sulcate. 



HAB. Pastures, &c. May July, 7J.; stem 1218 in. high; Jl. 

 large ; plant acrid. 



R. marilandicus : stem erect, somewhat branched, soft-hairy ; leaves 

 smoothish, ternate ; leaflets 3-lobed ; lobes oblong, acute, incisely- 

 dcntate ; calyx smooth, spreading, shorter than the petals. 



HAB. Woods. May July, 1\. ; pericarps compres., acum., with 

 a straight style. 



