14 BANUNCULACE^. ^ eanonculos. 



R. Cymbalaria Pursh Fl. ii, 392. Flowering stems 3-6 inches long, 1- 

 7-flowered: leaves broadly ovate or ov^te-cordate,, coarsely crenate, cluster- 

 ed at tile base and joints of the long filiform robting'rnlihers : petals yfeliow, 

 2 lines long, longer than the sepals : mature achenes a line long, striate- 

 veined on the sides, apex blunt, with a' short oblique beak : heads ."bblong, 

 2-6 lines long. In wet saline places ; California to Alaska and the Atlantic 



§ 2 E'uRANUNCiJLUS Gray 1. c. Mature carpels crustaci^oixsor 

 firm-coriaceousj the sides nerveless. Petals usually yellow, with a 

 nectariferous spot or pit and scale near the base. 



* Amphibious, the submeirsed leaves cut iiHo numerous "' filiform di- 

 visions : petals yellow, with a broad jscale at the base : achenes with a 

 broad white caruncle. ^'^ 



R. delphiuifolins Torr. in Eat. Man. ed. 4, 424. ? Glabrous; annual: 

 stems floating, a foot or two long : submersed leaves dissected into several- 

 times forked capillary divisions ; emersed leaves round or reniform, vari- 

 ously lobed or cleft : peduncles stout, 2 inches or more long : petals 5-8, 4-6 

 lines long, much longer than the sepals; scale J^ as long as its petal, inrol- 

 led. and its edges joined together foir half its length: achenes "strongly 

 margined, and pointed with a stout curved beak. In ponds that are dry 

 art of each yea,r. Western Oregon and Washington. 



R. limosus Nutt. T. &G.F1. i,2b. Subaquatic, soft-villous, procumbent: 

 leaves reniform, palmately 5-cleft, the segments 2-3-toothed or somewhat 

 lobed, the divisions blunt, short and shallow; stems 1-2-flowered: petals 



3 lines long,. roun<ied, longer than the sepals.: acheAes small, scarcely keel- 

 ed, with a short, nearly straight, subulate beak. Margins of brackish lakes, 

 plains of Idaho and Utah. 



* * Subaquatic, with entire or merely denticulate or crenulatey peti- 

 oled leaves ; petals 5 or more ; achenes in a globular head; subulate- , 

 beaked. 



R. reptans L. Sp. 549. E. Flammulu var. reptans Meyer PL Lab. 96. 

 Stems filiform, creeping and rooting at the joints, 4^12 ipches long; leaves 

 lanceolate to linear, acute at both ends, glabrous, entire : flowers 2-5 lines 

 wide I petals obovate : achenes barely a line long, roundish-ovate, tipped 

 with a slender curved beak. Common in wet places, Oregon to Alaska, New 

 York and Canada. 



R. microlouchns Greene Eyth. iii, 122. Perennial, the rather Itrge 

 cluster of fleshy-fibrous roots supporting a tuft of erect lanceolate leaves 

 and a single slender tortuous, often partly reclining, leafy and few-flowered 

 steni : leaves all entire, acute at both ends, the radical 1-2 inches long, on 

 slender petioles as long, narrowly lanceolate, nearly glabrous above, but 

 rather densely appressed-pubescent beneath ; cauline few, relatively some- 

 what broader, with short petioles or subsessile: flowers 1-several, yellow, 



4 hues broad : sepals spreading : petals 5-8, obovate, obtuse ; achenes few 

 m a depressed-globose head, obliquely obovoid, slightly narrowed at base 

 tipped with a short stout blunt style, moderately compressed, marginless 

 smooth and glabrous. Collected by E. L. Greene in N? Idaho, Augf 1889. 



R. Unalaschcensis Bess, in Ledeb. Fl. Ross, i, 32. R. Flammula var 

 mtermedius Rook Fl i 11. Stems decumbent and weeping, 4™rinches 

 long leaves all lanceolate or linear-lanceolate, entire or nearly so 1-2 

 inches long, tapermg below into the petiole.: petals obovate, 2-3 lines W ■ 



?f ^et^^K^^d'Xt ATa^L^^^"'' °^^^'^'^^ ^^^'^' '- -^" ^lobularltTs: 



r.^:r?^^i:^?j^^.;^^^fSLr^i^^o^^t§ 



throughout, simple and 1-flowered or branched and several flowered : hei? 



