43 



The West American Scientists 



§i. — Batrachium. 



// 



THALICTRUM OCCLDENTALE A. Gray 

 Of similar habit as T. polycarpum, leaflets 



rather larger, panicles more .-lender and open, RANUNCULUS AQUATILIS Linn, 



thestaminate very diffuse with slender elonga- Submerged, finely divided leaves, 



ted pedicels, styles more attenuate: fr 1-6 in Vai\ TRICHOPHYLLUS Chaix 



each head, narrowly oblong (3-4 lines long) and . c / i , A,-/ ' i 



narrowed at each end: seed nearly ^ inch long. btems ]on £' coarsely filiform: pedun- 



b-w Parish U8i b mts, he 54 c ^ es l ~ 2 ' long: fl 3-5" in ciameter: akenes 



%i.— 11 usually perfect: anthers small, elliplic- numerous in a close globular head, which 



is 2~3 // in diameter, b-i. 



oblong, obtuse. 

 THALICTRUM SPARSIFLORUM Turc_ 



Slender, glabrous, 1-3 ft high, leaves sessile Var. CyESPITOSUS DC. 

 or nearly so; leaflets hi-\\& inch long, with ob- Stems short, growing in mud 



tuse often mueronate lobes: panicle loosely ments of leaves Simulate i // 



few-flowered; pedicels elongate!; fr-ing heads . a .. . ,. 



nod.ling, the large div ricate akenes strongly ,011 2 : fl **" ln diameter, j 

 compressed, semi-obovate. shortly pedicellate, § 2— HALODES. Gray. Like § 3, bu- 



slightly nerved. b-Alaska, Siberia, Utah, Col. mature carpels thin-walled and utricu- 

 lar, the sides nervose: scapose and flag- 



seg- 

 or more 



Genus MYOSURUS Linnaeus. 



Sepals 5, spurred at the base; petals 5, 

 linear, on a slender claw, with a pit at its 

 summit; stamens 5-20; akenes very 

 numerous, crowded on a long and 

 slender spike-like receptacle; seed sus- 



elliferous, 



RANUNCULUS CYMBALARIA Pursh. 



Greenland, Asia, North and ^outh 

 America. 



§ 3 Euranunculus Gray. 



Petals (with nectariferous pit and scale, 



pended. Very small herbs, with a tuft usually yellow) and sepals deciduous, 



of linear or spatulate entire radical leaves, the sides nerveless, not transversely 



and solitarv flowers on simple scapes. @ ru ^ se ' 



MYOSURUS MINIMUS Linn. -Perennial by rooting from the nodes 



M. shortii Rafine^que in Sill J 1:879 of creeping or the lower nodes of ascen- 



Receptacle in fruit slender, 1-2 inches ding stems, wholly fibrous rooted. 



long: akenes blunt. Widely distributed RANUNCULUS HYDROCHAROIDES G. 



in Europe, Asia, Australia and America; Southern California east of the Sierra 



apparently indigenous in California. 

 Var. APUS Greene. Mesas, s. 

 Var FILIFORMIS Greene. Mesas, 

 MYOSURUS APETALUS Gay. 

 M aristatus Blh [vide G Torr cl bio 21. 



(Kellogg), z 

 R. Flammula L. 

 s. Var. Reptans E. Meyer,. 



Southern California (Parish 996). 

 * * Thickened-fibrous and fascicled 



Receptacle in fruit oblong or linear, rootS; ter restial: stems short, erect or 



2-3" long; akenes long-beaked: less assurge nt, not rooting from nodes above 



than i ; high. Utah; Chili; mesas, s. ground; mature akenes turgid and with 



Genus raiunculi'S Linnaeus. introrsely apical or subapical rather 



Crowfoot: sepah usually 5; petals 3-15, subulate beak, 



each with a small scale or pit at the base RANUNCULUS ALISMAEFOLIUS Gyr. 



inside; pistils numerous; akenes in a Idaho-Ca. R. bolanderiGeCa acb ^J:58 fide G. 



head, usually flattened, beaked with the f Heads of carpels in fruit oblong or 



persistent style. Herbs, mostly peren- cylindraceous; akenes more turgid, 



nial, of somewhat varied habit; fl cither rounded, or at least obtuse on the back, 



solitary or somewhat corymbed. RANUNCULUS ESCHSCHOLTZII Schl. 



The section Batrachium is treated as a genus . . p t ^ j t j uncinate> re- 



bvDasiniu vi in n bot studies 460, the 2 follow- , , 1 1 j 



ing varieties being referred to Btrichophyllum curved, shorter than the ovary, broad 



Boischprod fl bot 5. and flat. 



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