oralis. (iKKAMACi;.!:. 3g5 



sliort-stalked, al.out n lints lonp. olilicimly cmarKiiiutf, llic tcriniiial momly larfjer aii.l cud»- 

 ate; the coniiiioii priiole li.njjcr tlian tli<icali.i)* : llower;* al.-.m »i liti<-ii l<>ii^Mili..rt |i.-<lu.-lli-J. 

 mostly 3 ti)f;etlier, at the iiidi^uf axillary |M<iuiirl.-^ alx.ut <<nial t<. tin- li-m.-*tti,.| sirs i>U;rU 

 bracteil at top : st-pals lanreolatf : iH-lal.s ..iM.vatc. ttiri.f aw |..iij; it» th,. ralyx. n.uri<l«-«l «l 

 apex: capsule uv..itl, a little surpiissinj,' the sopalM ; we.N 1 i<. .'I in each cell', mJ.lij.h. fiui- 

 forin. soiiiewliat tlatienecl, three fi)Urih.s line lonj;, «iih x luiiKiiiiilinnl zi^uiK *i«K>' "f runi 

 of teeth. — But. Mex. linuMil. 41 ; Treleaj*e. 1 e. K7 . I. II, f 2. — . Southern 'Iexa». 



-<—•<—•»— Leaves palniately trifoliolate, ox.-itipiilale or with bhiirt ailiiate ^lipul<••: Icnflctx 

 suhsessile, somewhat ohli(|nely ol)eor(late-<iineate, variou>ly (tiirfajiMMl Ipv the ctniiiiiuu 

 petiole: capsule several-seeded ; seeds about time fourths line lonjj, reddiidi hrowu.uvato, 

 acute at apex, flattened, with 1 to 3 deej) marj;inal grooves and nuuieroun trauavenie 

 ridges somewhat interrupted by 2 low longitudinal elevations on each siile. 



++ Flowers small, homogoiie, the styles alnjut e<iiialling the longer stamens. 



= Leafy branches from a stout erect woody camiex. 



O. W^rightii, (iitAV. About a span high, more or less appre.K.sed-villous throughout, cfupi- 

 lose, the prostrate and rooting or iiscentling sleii<ler stems suffrutesrent and nmn' or lemi 

 branched below: leaflets 2 to 5 lines long, often broader; the common |H-tio|e somcHhat 

 stipular-dilated at base : flowers about 5 lines long, orange-i<jlore<l, often drying with a tinge 

 of blue, 1 to 3 at the ends of (or occasionally di.-itributcd along) the elongated axillary |H*<lun- 

 des, which are short- bracted at top; the refracted j)edicels at length alK»ut H lines long: 

 sepals lanceolate, mostly obtuse: jietals obovate, twice a.s long iis the <alyx, usually emargi- 

 nate : caps^ules oblong, several times as long as tlie .M-pals. — I'l. Wright, i. 27. ii. 2.'i ; 'li.rr. 

 & Gray, Pac. U. Hep. ii. lt>l ; Torr. Hot. Mci. Houml. 41 ; 'IreleiLM-. 1. c. hh ; Hnindeguc, 

 Proc. Cal. Acad. Sci. ser. 2, i. 202; I'arish, Krytlna, iii. CO. — Central California to Texaa. 

 (Mex.) 



= = Not from a stout caudex, herbaceous. 

 a. Without subterranean runners, mostly perennial: inflorescence soemingly umUUate ; 

 pedicels refracted in fruit. 



O. cornicul.4t.\, L. Annual, cespitose, ])rostrate and rooting at the node* or aflopnding ;, 

 the slender branches from a span to a foot long, .soniewhat rougbvillous : leaflets 3 to 5 linpn 

 long and mostly a little wider; sti]>ules evident, round-top|ied or truncate, adnale t«i the 

 petiole: flowers aliout 3 lines long, .solitary, or usually paireil or umbelled ; the shortly 

 bract eate peduncles longer than the leaves ; pedicels elongated : sepals lanceol.ite t<i oblong, 

 rather obtuse: petals obovate, about twice as long a.s the calyx, obsmnly crenulale or 

 emarginate ; styles and longer stamens about as long as the sepals: fruit .-is in the last. 

 — Spec. i. 435; Jacq. Oxal. 16, 30, t. 5; Kll. Sk. i. 52.'); Zucc. Oxal. 34. & Nachtr. 53; 

 Hook. Fl. Bor.-Am. i. 117 ; Torr. & Cray, Fl. i. 211 ; Heichenb. Ic. Fl. (Jerm. v. t. I'JS. f. 

 4896 ; Trelcase, 1. c. 88, in jiart, & Trans. St. Louis Acad. v. 28G. O. pusUIn, Sali.nb Tninn. 

 Linn. Soc. ii. 243, t 23, f. ."). — Occasional on the Atlantic coast, esjM-cially sontliward. and 

 a greenhouse weed everywhere. (Introd. fnmi Ku. and Tropics.) A form with ibep re«|. 

 purple stems and foliage, sometimes cultivated for bedding efTect, and mon- or le.-w |M«r.i!«t- 

 ent about gardens, is var. ATKOpriii't;itK.\, I'lanch. Fl. Serros, xii. t. 1205, sometimes known 

 al.so as var. rubra, var. tnrida, and as O. tro/>trnl<>ii/rs. 



Var. Dillenii, Tkki,k.\sk, n. comb. A sj>an or less high, cespit.»s<\ m<»stly «ubor«>rt, 

 branched from the ba.«e, rather .stout stemmed, from a thickish jiereiiuial root, apprf>»so<l gray- 

 strigose: petiole dilated below the jmlvinus into an entirely adiiate stipular membrane: i»«<«li. 

 eels rather stout and short, or exceptionally elongateil and br.iite:»te near the mitldlc: 

 flowers 4 or 5 lines long: petals fre(|iiently brown within towanl the Icvw- ; sH les Mtmelimrii 

 evidentlv longer than the stamens: capsule relatively large: otherwise like the lyj*. — 

 0. />////«//, Jac<i. Oxal. 1.'). 28 {(In/.t lulra Amrricnui humilior fl annnn. Dill. Kith. ii. «8. 

 t. 221, f. 288) ; Pursh, Fl. i. 323 ; Ziicc. Oxal. 35. ' O. j'urcala. Kll. Sk. i. 527. O. rttrn.cn- 

 /o/ri, Trele.-t.se, Mem. Boston Soc. Nat. Hist. iv. 88, in large j.arl. O. ttrin.i, Smull. Hull 

 Torr. Club, xxiii. 267. — From the (Jre.at Lnkes to Vancouver. Texa*. Florida, and New 

 Jersey. A more erect .stouter and more canescent form than the ty|M'. app.-aring i>|NH-ificallj 

 distinct in spring, but the more prostrate forms, cs|H.'cially late in suronicr, |>aMing into 



