14 RANUNCULACE^E. RANUNCULUS. 



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

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

 ed at the base and joints of the long filiform rooting runners : petals yellow, 



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 oblong, 

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

 States. 



2 EURANUNCULUS Gray 1. c. Mature carpels crustaceous or 

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

 nectariferous spot or pit and scale near the base. 



* Amphibious, the submersed leaves cut into numerous filiform di- 

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

 broad white caruncle. 



R. delphinifolius 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 ; emerged 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 % as long as its petal, inrol- 

 led and its edges joined together for half its length : achenes strongly 

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

 art of each year, Western Oregon and Washington. 



R. limosiis Nutt. T. &G.F1. i, 20. 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, rounded, longer than the sepals: achenes 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 crenulate, peti- 

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

 beaked. 



R. reptans L. Sp. 549. R. Flamrnula var. reptans Meyer PL Lab. 96. 

 Stems filiform, creeping and rooting at the joints, 4-12 inches long: leaves 

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

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

 with a slender curved beak. Common in w r et places, Oregon to Alaska, New 

 York and Canada. 



R. microlonchus Greene Eyth. iii, 122. Perennial, the rather Iprge 

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

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

 stem : 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 lines broad : sepals spreading : petals 5-8, obovate, obtuse ; achenes few, 

 in 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, Aug. 1889. 



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

 intermediiis Hook. Fl. i, 11. Stems decumbent and creeping, 4-14 inches 

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

 inches long, tapering below into the petiole : petals obovate, 2-3 lines long ; 

 achenes roundish-ovate, with a short oblique beak, in small globular heads. 

 In wet places, Idaho to Alaska. 



R. SH in olit'ol ins Greene Pitt, iii, 13. Stems several from a perennial 

 root, weak, somewhat flexuous and half reclining, 6-10 inches long, leafy 

 throughout, simple and 1 -flowered or branched and several -flowered : her- 



