Itanunculus. RANUNCULACE.E. 31 



R. Eschscholtzii, Sciilecht. A span <ir two or raroly a foot high, glabmuH or nearly «o, 

 1 -.J-llowered, sU'iidoi-filmms-rootod from a coimiioiily t»lili<jMe cuiidex or Khort hori/ontal 

 rootstock : Icavfs of roundish outline ; radit-al all 3-.')-j)artcd or dceidy rleft.and thi-irolMoato 

 or cuneate divisions mostly lol)ed or iucisod ; caulino similar or with ohlon^ to 8|ialulatc or 

 lanceolate and often entire divisions : j)ctal8 a (juartcr to nearly half inch lonj; : akt-nes 

 glabrous, with slender-subulate and mostly straight stylo of more than half their li-ngth anil 

 more or less ])ersistent as a beak. — Animad. Uanune. ii. 10, t. 1 ; Hook. M. IJor.-Am. i. IK; 

 Terr. & Gray, Fl. i. 21 ; Ledeb. Fl. Ku.ss. i. 37. /i. uivulis, var. Ksrks.holi-:;, Wats. Rot. 

 King Exp. 8. — N. Alaska and Aleutian I.slands to the Cascade Mountains and south to 

 those of Nevada, and the liocky Mountains south to Colorado in the aljiine regions.' 



R. affinis, R. Bu. A span to a foot high, pilose jtubc.scont to glaluous, few- to sevenil- 

 flowered : leaves various, but the caulino with linear or narrow oblauceolate divisions : petal.-* 

 light yellow, a quarter to a third inch long and obovate, l)ut occasionally small and incon- 

 .spicuons: akeues densely short-pube.scent varying to glabrous: small and short mo.stly 

 recurved style much shorter than the ovary, at most a ([uarler cjf the length i>f the akene, 

 often only its thickish ba.se persistent at maturity. — K. Br. in I'arry, l.st Voy. Suppl. to App. 

 26.5 ; Kichards. in Frankl. 1st Jouru. ed. 2, A])p. 751 (reprint, ]). 23) ; Lange, Medd. (iniiil. bl , 

 & Fl. Dan. t. 3029; Gray, Proc. Am. Acad, xxi.371. /».H;v7(ri/s, Hiahanf.s. in Frankl. Ist.Ionru. 

 ed. 1, App. 741 (reprint, p. 13). R. aiiKmus, Ledeb. Fl. Alt ii. 320, & Ic. t. 113. A', joilntiji- 

 (Ills, Sclilecht. I.e. 18, &c., probably not Smith.'^ R. auriromus, Hook. f. Arc. PI. 283. 312.— 

 Throughout arctic America, and southward to Labrabor^ and the liocky M<juntains to 

 Colorado. (N. Asia, Greenland.) Very variable, (juite distinct from R. auricuiiins, L., in 

 akenes, styles, &c. ; the typical form small or slender, witii even the radical leaves " ]>e(lately 

 miiUirnl," most of them to near the base. 



Var. validus, Gray, 1. c. Stouter and larger, with thicker more succulent leaves; 

 the radical (an inch or two long) most of them undividtMl and roundish, either cordate 

 or truncate or cuneate at base, and from coarsely crenate to 3-7-ck'ft or parted, occa- 

 sionally some divided and even with divisions petiolulate : forms varioiLs and conlluent, 

 and passing into the more arctic-alpine slender form. — A*, affiuis, vars., Hook. Fl. Bor.-i\m. 

 i. 12, t. 6. R. c(irdioph;/l.lus, Hook. 1. c. 14, t. 5, & Bot. Mag. t. 2999, but style too long. 

 R. affinis, var. cardiophiiUus, Gray, Proc. Acad. Philad. 18G3, .56, but name only occasionally 

 appro])riate for this whole group of forms. R. nuricnmiis of Amer. authors. — .Subarctic 

 America and Canada to Montana, and south through the Rocky Mountains to Utah, 

 Colorado, and N. New Mexico. Var. leiocarpus, Trautv. in Middendorf, Reise in Sibir. 

 62, has glabrate or glabrous fruit. Var. histococc.ux, Torr. Bot. Wilkes Exped. 213, only a 

 villous-fruited form.* 



3. Head of carpels in fruit globose: styles minute and .straight: plant resembling a low 

 form of the variety of the foregoing. 



R. rhomboideus, Goldie. Dwarf, a span or two high, villous-hirsute or almost glabrous, 

 few-flowered : radical leaves from rhoml)ic-ovate o'r obovate with acute base to rotund and 

 rarely sube'ordate, and from creimlate to serrate ; lower cauline more cleft, the sessile upper 

 ones 3-5-parted into linear divisions: petals obovate, 2 or -3 lines long: akenes obovate, 

 rounded on the back, glabrous; the minute beak or style inconspicuous. — Edinb. Phil. 

 Journ. vi. 329, t. 11, f. 1 ; Richards. 1. c. ; Honk. I. c. 12 ; Gray, Man. ed. 5, 42. R. nmlis. 

 Hook. Fl. Bor.-Am. i. 13, t. 6, probal)ly even of Raf. Prec. Decouv. 36, & in Desv. Journ 

 Bot. vi. 268(1814), from "Canada and Genes.see," which is otherwi.se wholly obscure* 

 R. brevicaulis. Hook. 1. c. 13, t. 7, a very depres.sed almost stemless form, with radical 



1 Also on summit of Gr.ayback Mountains, S. Calif., W. O. Wriffht, ace to Pari.-Jli, Zoe, iv. 161. 



2 Dr. N. L. Britton, Bull. Terr. Club, xviii. 265, maintains the identity of Smith's species, and 

 according to that view R. affinis, R. Br., .should become R. pedatijuliis. Smith, while var. mlUu.i, 

 Gray, becomes R.pedatifidnii, var. r.nrdiophijUioi. Britton, 1. c. 



3 Mt. Albert, G:ispe, Lower Cana.la, J. A. Allen. 



* Var. microprtnlua, Greene, Fittonia, ii. 110 (R. Anzimicits, var. .< •. 1- c. 60, 



not Gray), is from cliaracter a slender small-flowered form from the San Fi:: S Arizona. 



6 [n his provisional notes upon the genus, Proc. Aiii. .\cad. xxi. :^71. 1' liy through 



clerical error ascribes the name rhomh.hb'us to H:iliiics.|uc. while clearly havmg mtiUs in mind, m 

 his reference ami habitat slinw. 



