206 ORDER 1. RANUNCULACEJ3. 



4 R. Purshii Rich. Floating; st. long; submerged Ivs., cleft into numerous 

 capillary segments, emersed ones reniform, 3 5 parted, the lobes variously di- 

 vided ; reflexed, half as long as the yellow petals ; carpels smooth, with a short r 

 straight, ensiform style; hds. globus. Ponds, sluggish streams, and muddy 

 places, Can., U. 8 Stem 1 2f or more in length, fistulous. Lvs. pentangular 

 in outline, - !-' diam., those below more finely divided; petioles 2' in length. 

 Fls. bright yellow, emerging on forked, striate peduncles. May, Jn. 



(3. FLUVIATILIS. Lvs. all capillaceous-multifid ; fls. as largo as in R. acris. (R. 

 lacustris Beck.) 



5 R. Cymbalaria Ph. St. filiform, creeping, rooting ; Ivs. reniform-cordate, cre- 

 nate-dentate ; ped. solitary, mostly 2 -flowered ; petals spatulate; ach. oblong. 

 In salt marshes on the sea-coast, and at Salina, N. Y. Stem round, sending out 

 runners from the joints. Lvs. radical, ^ 1' diam. on long petioles. Scapes 

 2 6' high, each with 2 small, bright-yellow flowers, and as many obtuse bracts. 

 Nectary naked (not covered by a scale). Jn. 



6 R. reptana L. Stem creeping, geniculate, rooting ; nodes I-flowered ; Ivs. lin- 

 ear, entire, remote. A slender species, creeping on river banks and other wet 

 places, Can., N. H., W. to Oregon. Stem 6 8' long, round, rooting at the 

 joints. Lvs. fleshy, G 12" in length, mostly very narrow and acute at each 

 end. Fls. small (3 4" wide). Sepals spreading, obtuse. Petals obovate, yel- 

 low, fading to white. Nectary covered by a scale. Ach. very smooth. Jl. (R. 

 filiformis MX.) 



ft. OVALTS. Lvs. oval and lanceolate ; pet. 5 10. 



7 R. Flammiila L. SPEARWORT. Stem declinate at base, erect ; Ivs. all lance- 

 shaped, on sheathing petioles. An aquatic herb, growing in ditches and swamps, 

 Can. to N. Car., "W. to 111. Root fibrous. Stem G 18' long, more or less de- 

 cumbent, succulent. Lvs. 3 6' in length, entire, or with a few teeth, thick- 

 ened at the acute summit. Fls. solitary, of a golden yellow, on peduncles ^ as 

 long as the leaves. Fruit roundish, twice longer than its beak, in a globular 

 head. Jn., Aug. (R. alismaefolius Geyer.) 



Q R. pusillus Poir. Erect; Ivs. att pet-iolate, lower ones ovate, upper ones linear- 

 lanceolate; pet. mostly but 3 scarcely longer than the calyx ; stam. 8 10 ; carpels 

 ovate, scarcely pointed. In wet grounds, N. Y. to Ga. and La. Stems slender, 

 weak, 6 12' high, dichotomously branched. Lower Ivs. subcordate, ^ 1' long. 

 as wide, petioles 1 3" long, upper ones 1 H" long, \ as wide, with minute, 

 remote teeth. Fls. very small, yellow, on long peduncles. May. 



9 R. Texensis Engl. TEXAS CROWFOOT. Erect, diffuse, branched ; Ivs. lance- 

 ovate and lanceolate ; fls. minute, stam. about 20. La. and Tex. Glabrous, or stem 

 puberulent, 12 18' high, dividing above in numerous slender branches and pe- 

 duncles. Lvs. petiolate, denticulate, upper linear. Fls. numerous, petals yellow, 

 less than 1" long. Carp, minute, pointless, in round heads. 



10 R. abortivus L. Smooth ; radical Ivs. roundish, cordate, crenate, petiolate ; cal. 

 a little longer than petals, reflexed. A very pretty species in woods, Can. to 

 Ark., remarkable for the dissimilarity of the root and stem leaves. Stem 8 1G' 

 high, nearly naked. Root Ivs. 8 18" diam., quite regularly margined with cren- 

 ate divisions, and on petioles 2 5' long. Lower stem Ivs. pedate, with a pen- 

 tangular outline ; upper in 3 deep, linear segments, sessile. Fls. small, yellow. 

 Fruit in globous heads. May, Jn. 



ft MICRANTIIUS. Hairy, low (C 5'); lower Ivs. scarcely cordate, 3-lobed or 3- 

 cleft. Fls. 1 or 2. Mass. (Sprague) to Ga. ! (R. micranthus, Nutt) 



11 R. rhomboideus Goldie. Hirsutely pubescent, much branched; root Ivs. 

 rhomboid-ovate, crenate- dentate, on long petioles ; sep. spreading, shorter than the 

 petals ; ach. smooth, .with very short beaks. "\Vis. (Lapham) and Can. W. A 

 low, bushy, hairy species, 6 10' high. Root Ivs. about 1' by f ', often roundish 

 or elliptical, the petioles about 2' long. Segments of the stem leaves linear- 

 oblong, obtuse, oftener entire. Petals yellow, oblong- obovate. Heads of carpels 

 globous. (R. ovalis and brevicaulis, Hook.) 



12 R. fascicularis Muhl. EARLY CROWFOOT. Erect; root fasciculate ; radical 

 Ivs. appearing pinnate ; peduncles terete ; carpels scarcely margined. Rocky woods 



