206 Oedeh 1.— RAJSrUNCULACE^. 



4 R. P6rshii Rich. Floating; st. long; submerged Ivs., cleft into numerous 

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

 vided ; reflexed, half as long as the yettow petais ; carpels smooth, with a short, 

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

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

 in outline, f— IJ' diam., those below more finely divided; petioles J — 2' in length. 

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



fi. TLUTIATILIS. Lvs. all capillaoeous-multifid ; lis. as large as in E. acris. (R. 

 lacustris Beck.) 



5 H. Cymbal^ria Ph. .St filiform, creeping, rooting ; lvs. r.efniform-cordaie, are- 

 nate-dentaie ; ped. solitary, mostly 2-fiowered; petals spatulate; aoh. oblong. — 

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

 runners from the joints. Lvs. radical, J — 1' diam. on long petioles. Scopes 

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

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



6 R. reptans L. Stem creeping, geniculate, rooting; nodes l-flowered; lvs. 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, 6 — 12" in length, mostly very narrow and acute at each 

 end. Pis. 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.) , 



/3. ovALis. Lvs. oval and lanceolate ; pet. 5 — 10. 



7 H. Flammula L. Speaewort. Stem dechnate at base, erect ; lvs. all lance- 

 shaped, on sheathing petioles. — ^An aquatic herb, growing in ditches aud'swamps, 

 Can. to N. Car., W. to 111. Root fibrous. Stem 6 — 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. Pis, solitary, of a golden yeUow, on peduncles J as 

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

 head. Jn., Aug. (R. alismsefolius Greyer.) 



8 R. pusillus Poir. Erect; lvs. all petiolate, 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. T. to Ga. and La. Stems slender, 

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

 J as wide, petioles 1 — 3" long, upper ones 1 — IJ" long, J as wide, with minute, 

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



9 R. Tez^nsis Engl. Texas Crowfoot. Brect, diffuse, iramhed; lvs. lance- 

 ovate and lanceolate ; fls. minute, slam, 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 Mnear. Pis. 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 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 — 16' 

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

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

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

 Pruit in globous heads. May, Jn. 



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

 olefl. Pis. 1 or 2. Mass. (Sprague) to Ga. I (R. micranthus, Nutt.) 



11 R. rhomboideus Goldie. Sirsutely pubescent, much branched; root lvs, 

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

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

 low, bushy, hairy species, 6—10' high. Root lvs. about 1' by §', 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. fascioularis Muhl. Early Ceowpoot. JSreci; root fascieulaie ; radical 

 lvs. appearing pinnate ; paduncles terete ; carpels scarcely rfiargined. Rodty woods 



