16 RANUNCULACEiE. Anemone. 



a. heierophyllus : cmcrscd leaves 3-parted. DC. I. c. — R. aquatilis, 

 Pursh, I. c. 



p. capiUaceus: leaves petioled, all immersed and filifofmly dissected. 

 DC. I. c. ; Honk. I. f.— R. pantothrix, DC. syat. 1. p. 235 ; Ell. Wc. 2. ;;. 57. 

 R. fluviatilis, Willd. sp. 2. p. 1333 ; Pursh, I. c. 



y. ca'spitosus : leaves petioled, all emersed, with a nearly orbicular cir- 

 cumscription, filiformly dissected, the segments rigidly divergent; base of the 

 petiole broad, sheathing and auricled. DC. I. c; Hook. I. c. 



f). stagnalis: leaves sessile, all immersed, filiformly dissected, circinnatc ; 

 segments short; sheaths obscurely auricled; carpels rather acute, nearly 

 smooth. DC. I. c. ; Hook. I. c. 



Ponds and rivers, Arctic America to South Carolina, and west to the 

 Rocky Mountains! and Columbia River! California, {Hook tf Am. in 

 hot. Beechey's voy.) June-Aug. — Stem long, slender, jointed. Leaves 

 dichotomously or trichotomously divided. Flowers smaller than those of R. 

 acris. Calyx glabrous. — We have never seen American specimens of Var. o. 

 Var. y and ^, British America, Hooker. 



§ 2. Carpels smooth {not wrinkled), ovate or suhrotunO, in roundish 

 heads : root jibrous. — Hecatonia, DC. 



* Leaves divided : flowers, ivhilc. 



2. R. glacialis (Linn.): radical leaves petioled, palmately 3-parted or 3- 

 cleft ; lobes rather obtuse and thick ; stem about 1-flowered ; calyx very hir- 

 sute; carpels compressed, margined. DC. prodr. 1. p. 30. 



Greenland. 



** Leaves all undivided ; flowers yellow. 



3. Jl. Flammula (Linn.): leaves smooth, linear-lanceolate or ovate-lance- 

 olate, often denticulate ; stem declined, more or less rooting at the lower 

 joints; peduncles opposite the leaves; carpels smooth, with a distinct sub- 

 ulate beak ; petals much longer than the calyx. — DC. prodr. 1. p. 32 ; Pursh, 

 Jl. 2. p. 391 ; Darlingt. ! fl. Cest. p. 327. 



/?. laxicaulis : stem weak, much branched; leaves all entire; lowest 

 ones eUiptical-oblong, upper ones linear; petals oblong, attenuate at the base, 

 three times as long as the calyx. 



Inundated places, ditches, &c. Canada ! to North Carolina. P. Milledge- 

 ville, Georgia, Dr. Boykin J July. — Whole plant glabrous. Stem 1-2 feet 

 long, a little branched; leaves 3-6 inches long, 4-8 lines broad, those of the 

 stem acute at each end ; lower ones petioled, more or less obtuse at the base. 

 Peduncles 1-2 inches long. Flowers 4—5 lines in diameter. Head of car- 

 pels globose. Beak two-thirds the length of the car])el. 



4. R. reptans (Linn.): leaves linear or lanceolate-linear, acute at each 

 end, glabrous, entire; stem creeping (rooting at the joints); carpels glabrous, 

 puncticulate, with a minute blunt point. — DC. prodr. 1. p. 32. 



jff. oralis, (Bigel.) : leaves oval and lanceolate ; petals 6-10. Bigel. I. c. 

 y. intermedius (Hook. !) stem creeping, slender, leaves narrow, lanceolate, 

 the upper ones linear ; flower middle sized. 



5. jiUformis (DC): stem filiform, creeping extensively, leaves linear; 

 flowers small.— R. filiformis, Mich. v. ! fl. 1. p. 320; Pursh, Jl. 1. p. 392; 

 Bigel. fl. Bost. ed. 2. p. 224. 



Banks of rivers and low grounds, Labrador and Canada to New- York ! west 

 to Oregon ! June-August, 



