0(j RA^'U^■L'L■I.At"l•:.■E. Rmnmculux. 



Lindh. i. 3 (no^ Ell.), excl. var. Lindheimeri, but ind. Mir. auyustifolius. — Low gnmuds 

 Loui«:.r.aa, Lamjlois, aud Texas ; first coll. by Lindheimer. 



R. pusillxiS, PoiR. Stems 6 to 20 inches high, uot rarely rooting from decumbent base : 

 carpels somewliat obovate, half to three fourths line long, dull, smooth or irregularly some- 

 what papillose, rather numerous in a small globular head. — Diet. vi. 99; Pursh, Fl. ii. 392; 

 Deless. Ic. Sel. i. t. 28 ; JEll. Sk. ii. 57 ; Torr. & Gray, Fl. i. 17, partly. R. Flamiiiula, Walt. 

 Car. 159, not L. /»'. humilis, Pers. Syn. ii. 102. (R. Bonarieusis, Poir. 1. c. 102, is very 

 near, and of no older date) — Wet ground or iu shallow water, Staten Island, New York, to 

 Mis.souri and southward to Florida and Texa.s, along the low country. 



Var. Lindheimeri, Gray. A span or two high: akencs more papillose-roughish. — 

 Proc. Am. Acad. xxi. 367. R. trachyspermus ? var. Lindheimeri, Engelm. in Gray, PI. 

 Lindh. i. 3; Torr. Pacif. R. Rep. iv. 62; Brew. & Wats. Bot. Calif, i. 7.^ — New Orleans, 

 Berlandifi; no. 1939; Galveston, Texas, Lindheimer ; Napa Valley and San Rafael, Cali- 

 fornia, Biijelow, J. P. Moore. 



= = Petals 5, bright yellow, 1 to 3 lines long, surpassing the calyx : stamens numerous. 

 R. oblongifolius, Ell. Mostly a foot or two high, paniculately branched, seldom root- 

 ing at base, seemingly annual : akenes rather few in a small globose head, globular or 

 turgid-lenticular, smooth or scabrous-puncticulate, only one third line long ; the small or 

 slendor style wholly deciduous. — Sk. ii. 58; Gray, Man. ed. 5, 41. R. Flammula, Michx. 

 Fl. i. 321. R. pusillus, var. olilongif alius, Torr. & Gray, Fl. i. tl. R. Flammula, \&i\ laxi- 

 caulis, Torr. & Gray, 1. c. 16.2 ^. Texensis, Engelm. in Gray, PI. Lindh. i. 2. — Wet ground, 

 Illinois 3 and S. Carolina to Texas. 

 ++ -I-*- Akenes subulate-beaked (but the beak sometimes deciduous or reduced to an a])iculus), 



smooth, in a globular head : petals as many as 5. 

 = Perennial by rooting from the lower nodes of ascending stems or from most of those of 

 creepiiig stems : roots all fibrous and not thickened. 



a. Some lower cordate leaves. 

 R. hydrocharoides, Gk.vt. Amphibious, with erect or ascending flowering stems a span 

 or two high, and elongated creeping branches from the ba.se, these stout and fiBtulous or 

 sometimes slender : leaves all ^tire or nearly so (inch or less long), somewhat succulent, 

 chiefly long-petioled ; lower either round-cordate or oval, or st)me like the uppermost 

 obovate or spatulate : petals 2 or 3 lines long, much surpa.ssing the calyx : akenes in a small 

 globose head, less than a line long, tipped with narrow and short abrupt beak. — PI. Thurb. 

 in Mem. Am. Acad. v. 306; Rothrock in Wheeler, Rep. \\. 56. — Marshes and springs, 

 S. W. Arizona, Thurher, J.D. Smith, Rothrock, Lemmun, the specimens of the last less succu- 

 lent and rather longer-styled ; Owen's Valley, S. E. California, Kellogg, a slender form, with 

 small leaves and longer styles. 



R. STOLON! FER, Hemsl. of Northern Mexico, much smaller-flowered, is related to this. 



b. No cordate leaves, the radical ones at most oblong or ovate. — Spearwort. 



R. Flammula, L. No representative known in N. America of the true .species, which has 



ratiier tlio haliit of the next, Avith a.scending stems rooting only at or near the base, a foot 



or so higli ; with lower leaves ovate-oblong to lanceolate and often rounded at ba.se, not 



rarely with serratures ; akenes small, with a small or minute beak, or the deciduous style 



leaving only an apiculation. — Spec. i. 548 ; Fl. Dan. t. 575 ; Curt. Fl. Loud. vi. t. 36. — (Eu.) 



Var. intermedius, Hook. Smaller : stems decumbent and creeping, often to a foot in 



length : leaves all lanceolate or linear-lanceolate, entire or nearly so, inch or two long, 



tapering into tlie petiole : petals 2 or 3 lines long : akenes of the type or more beaked. — 



Fl. Bor.-Am. ill; Gray, Man. ed. 5, 41, & Proc. Am. Acad. viii. 373. R. Flammula, var. 



Unaldschensis, Ledeb. ace. to Regel, Bull. Soc. Nat. Mosc. xxxiv. pt 2, 41. R. reptans, var. 



1 Add syn. IR. Biolettii, Greene, Pittonia, ii. 225, nearly from character, and fide K. Brandegee, 

 Zoe, iv. 81. 



2 Add syn. R. laxicaulis, Darby, Bot. S. St. 204. 



8 S. E. Missouri, Eggert, Bush, and Isle of Wiglit County, Virginia, ace. to Heller, Bull. Torr. 

 Club, xxi. 22. 



