206 Oeder 1.— RANUNCULACE^E. 



4 R. Piirshii Rich. Floating; st. long; submerged lvs., cleft into numerous 

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

 vided ; sep. reflexed, 1 us long as the yellow petals ; carpels smooth, with a short, 

 straight, ensilbrm style; hds. globous. — Ponds, sluggish streams, and muddy 

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

 in outline, 3 — IV diam., those below more finely divided; petioles ^ — 2' in length. 

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



p. fluviatilis. Lvs. all capillaceous-multifid ; fls. as large as in R. acris. (R. 

 lacustris Beck.) 



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

 nate-dentale ; ped. solitary, mostly 2-flowercd ; 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, I — 1' diam. on long petioles. Scapes 

 2 — G' high, each with 2 small, bright-yellow flowers, and as many obtuso bracts. 

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



6 R. reptans L. Stem creeping, geniculate, rooting; nodes 1-floiuered; lvs. lin- 

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

 places, Can., N. 11., W. to Oregon. Stem 6 — 3' long, round, rooting at tho 

 joints. Lvs. fleshy, 6 — 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.) 



(i. ovalis. Lvs. oval and lanceolate ; pet. 5 — 10. 



7 R. Flammula L. Spearwort. Stem dcclinalo at base, erect; lvs. 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 tho acuto summit. Fls. solitary, of a golden yellow, on peduncles £ as 

 long as tho leaves. Fruit roundish, twico longer than its beak, in a globular 

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



8 R. pusillua Poir. Erect; lvs. all petiolate, lower ones ovate, upper ones linear- 

 lanceolate; pet. mostly hut 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, G — 12' high, diehotomously branched. Lower lvs. subcordate, \ — 1' long. 

 ■J as wide, petioles 1 — 3" loug, upper ones 1 — lj" long, \ as wide, with minute, 

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



9 R. Texensis Engl. Texas Crowfoot. Erect, diffuse, branched; lvs. lance- 

 oT^ate 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 lvs. roundish, cordate, crenate, petiolate; caL 

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

 Ark., remarkable for the dissimilarity of the root and stem leaves. Stem 8 — 16' 

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

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

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

 Fruit in globous heads. May, Jn. 



/? micranthus. Hairy, low (3 — 5'); lower lvs. scarcely cordate, 3-lobed or 3- 

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



11 R. rhbmboideus G oldie. Hirsutely pubescent, much branched; root lvs. 

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

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

 low, bushy, hairy species, G — 10' high. Root lvs. about 1' by §', often roundish 

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

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

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



12 R. fascicularis Muhl. Early Crowfoot. Erect; root fasciculate ; radical 

 lvs. appearing pinnate ; peduncles terete ; carpels scarcely margined. — Rocky woods 



