302 RANUNCULACEAE 



minute. R. natans A. Gray, not C. A. Mey. Water: Colo. Wyo. Ida. Mont. 

 Je-Au. 



51. R. hyperboreus Rottb. Creeping mud plant, glabrous, usually less 

 than 1 dm. long; leaf-blades less than 1 cm. broad, palmately 3-5-lobed, cuneate 

 or rounded at the base; petals 2-3 mm. long; heads of achenes about 3 mm. 

 thick; beak minute. In mud: Greenl. Lab. Mont. Alaska. Alp. Subalp. 

 Jl-Au. 



52. R. arvensis L. Stem glabrous or sparingly pubescent, branched above, 

 3-4 dm. high; lower leaves petioled; blades cuneate, 3-5-lobed at the apex; the 

 rest of the leaves short-petioled, twice or thrice ternate; primary divisions dis- 

 tinctly petioluled, the ultimate ones lanceolate or linear; sepals lanceolate, 

 yellowish, membranous, long-pilose, 5 mm. long; petals obovate, strongly veined, 

 6-7 mm. long; achenes few, obliquely ovate, compressed, 7-10 mm. long, spiny; 

 beak 3-4 mm. long, flat, subulate, slightly curved. Waste places: N.J. O. 

 Utah; adv. from Eu. Je-Au. 



11. COPTIDIUM Beurl. 



Scapose perennial herbs, with slender, stoloniferous rootstocks. Leaves 

 basal, petioled, with reniform, 3-parted blades, the divisions of which are again 

 lobed. Scape 1-flowered. Sepals and petals 5, the latter yellow. Pistils rather 

 few; styles long. Achenes obliquely ovate, the lower half enclosing the seeds, 

 the upper portion empty, flattened, somewhat spongy. 



1. C. lapponicum (L.) Gand. Stem scapiform, about 1 dm. high, filiform, 

 glabrous, naked or with a single small leaf; basal leaf-blades 2-5 cm. wide, gla- 

 brous, ternately divided; divisions cuneate, 3-5-lobed; petals elliptic, about 5 

 mm. long, equalling the sepals; achenes about 5 mm. long, 2 mm. wide, acute at 

 both ends; beaks about 1.5 mm. long, hooked. Ranunculus lapponicus L. 

 Anemone nudicaulis A. Gray. In moss: Lab. Ont. Minn. Alta. -Alaska; 

 Eu. Subalp. Subarctic Boreal. Je-Jl. 



12. BECKWITHIA Jeps. 



Perennial herbs, with fibrous, fascicled roots. Leaves alternate, palmately 

 dissected. Flowers perfect, solitary or few. Sepals marcescent, persistent. 

 Petals large, broad and overlapping, white or rose-colored, nectariferous and 

 with a rudimentary scale. Pistils many. Achenes thin-walled, utricular, com- 

 pressed, narrowly scarious-margined, apiculate. 



Scape l-flowered, bractless; achenes 8-10 mm. long, inflated. 1. B. Andersonii. 



Scape 2-3-flowered, with a leaf-like bract; achenes 3-4 mm. long, not inflated. 



2. B. juniperina. 



1. B. Andersonii (A. Gray) Jeps. Scape about 1.5 dm. high; leaves fleshy, 

 glabrous, bi- or triternate and parted into linear or lanceolate lobes; sepals 

 broadly elliptic; petals orbicular, pink, 10-15 mm. long; achenes flattened, but 

 inflated. Ranunculus Andersonii A. Gray. In rocky mountains: Ore. Ida. 

 Utah CalifT Submont. Mont. Ap-My. 



2. B. juniperina (Jones) Heller. Scape 2-3 dm. high; leaves basal, petioled, 

 triternately divided, with short lanceolate lobes; sepals greenish, broadly obovate 

 and enclosing the fruit; petals first white, veined with pink, becoming purple 

 and 10-15 mm. long, broadly oval or orbicular; achenes flat. Ranunculus 

 Andersonii tenellus S. Wats. Gravelly mountain sides: Utah. Mont. Ap. 



13. HALERPESTES Greene. 



Perennial herbs, with runners. Leaves mainly basal, petioled, cleft or toothed- 

 Stem Biore or less scapiform. Flowers small, perfect, cymose or solitary. Se- 

 pals usually 5, spreading, tardily deciduous. Petals 5-12, each with a nectar- 

 iferous pit at the base. Stamens and pistils numerous. Achenes compressed, 

 thin-walled, longitudinally striate. 



1. H. Cymbalaria (Pursh) Greene. Leaves glabrous, more or less fleshy; 

 blades rounded-cordate or reniform, crenate, 4-18 mm. long; scapes 2-30 cm. 



