120 ORDER 54. ONAGRACE.E. 



0. nitn-lrata. Stem rough-hirsnte ; petals but little longer than the stair ens. 



y. e~randtabra. St. branching ; pet. much longer than stam., deeply obcordate 



S. parrtttora. Calyx tube elongated ; petals small, as long as the stamens. 



f. trucfbta. Petals linear-oblong, shorter than the stamens. 



. rniifurrnx. Petals enlarged ; whole plant canescently hairy. 



2 CE. rliombipetala N. St. erect, tall, smooth; Ivs. lance-linear; pet. rhombic- 



elliptical, pointed ; cal. tube 3 4 times longer than ovary. @ Prairies, W. 2 3f. t 



3 CE. siiiuitta L. Pubescent, decumbent at base ; Ivs. oval-oblong, sinuate-denttte, 



or incised ; fls. axillary, solitary ; tube twice longer than ovary. N. J. and S. 3 fi 7 . 

 0. minima. Low, simple, 1-flowered ; Ivs. snbentire. Pine-barrens, N. J. and S. 



4 CE. pikmlla L. Low, pubescent, half-erect ; Ivs. lanceolate ; fls. 6". in a leafy spike ; 



calyx tube shorter than the oblong-clavate ovary. @ Meadows, Can. to Car. 6 10'. 



5 CE. clirj-santlia MX. Ascending, slender; fls. small (5") crowded, spicate; Ivs. 



lanceolate ; cal. tube as long as the ovary ; pet. emarginate. N. Y. to Wis. 1218'. 



6 CE. frutlcosa L. St. rigid, hairy or downy; Ivs. lance-oblong; rac. corymbecl ; fls. 



W'diam. ; pod oblong-clavate, 4-winged, 4-ribbed, pedicellate. li Hard soils. 1 3f. 



7 <E. ri p.irla N. St. slender, branched, purple, and polished ; Ivs. lin. -lanceolate, peti- 



olate, denticulate ; rac. corymbed ; fls. large (18"). Banks, N. J., and S. 1 2f. M-ay-t-. 



8 <E. linear!* MX. Hoary-puberulent. subsimple ; Ivs. linear, subentire, obtuse ; fls. 



large, corymbed ; pod obovold. V Montank Pt. to Tenn., and S. 1 IJf. May, June. 



9 <E. glaiica MX. Smooth, glaucous ; Ivs. ovate, sessile, pointed; fls. large, clustered 



at the ends of the branches ; pod oval, li Va. to Ky., and S. 2 3f. May July. 



10 CE. MrssotnuENSis Sims. Simple, decumbent; Ivs. thick, lanceolate, petiolate; fls 

 very large (4'). tube very long; pod very large, 4-winged. Dry hills, Mo. July Oct. 



11 CE. NOCTURNA. St. erect, downy ; Ivs. lanceolate, repand-dentate. @ S. Af. 2f. 



1 2 CE. LONGIFLORA. Simple, hairy ; Ivs. lanceolate, denticulate ; pet. 2-lobed. S. Am. 

 1 3 CE. SPECIOSA. Lvs. pinnatifid below ; fls. diurnal, white, fading red. li Ark. IS'. 

 14 <E. TETRAPTERA. Lv. pinnatifld below ; fls. nocturn.. large, pure wh. (J) Mex. l-2f. 



CE. RUBICUNDA. Erect; Ivs. lance-linear ; pet. rose-purp., orange at base. (i)Cal. 2f. 



6 <E. LINDLEYI. Diffusely branched ; Ivs. lance-lin. ; pet. lilac, red at base. (I) Cal. If. 



1 7 CE. VIN&SA. Erect ; Ivs. linear-oblong ; pet. white-roseate ; fls. 2' broad. (T) Cal. 2f. 



1 8 CE. LEPIDA. Erect, simple ; Ivs. lance-obi. ; pet. pale-purp., crimson-spotted at edge. 



5. GAURA, L. Calyx tube much prolonged above the ovary, cylin- 

 dric, limb 4-cleft. Pet. 4, unguiculate, somewhat unequal. Sta. 8, dccli- 

 nate, alternate ones a little shorter. Ovary oblong, 4-cdled, nut usually by 

 abortion, 1-celled, l^i-seeded. Herbaceous or shrubby. Lvs. alternate 

 Flowers white and red, in slender spikes. July, August. 



1 G. hleiinlw L. St. branched, pubescent ; Ivs. lance-oblong, spikes dense ; cal. tube 



as long as the segments, the pet. rather shorter. Dry bluffs, rare, handsome. 3 5f. 



2 G. flllpea Spach. Paniculate and naked above; Ivs. linear-oblong, tufted at the 



base of the slender racemes ; calyx segments longer than the tube or petals ; pods 

 obovoid-clavate, on slender pedicels. Dry soils, S. and W. 3 5f. 



3 G. angnstlfolia MX. Pubesocct ; Ivs. linear, very acute ; calyx seg. much longer 



than tube or pet. : pod sessile, ovoid, sharply 4-angled. S. Car. to Fla. Fls. small, wh 



4 J. LINDHEIMERI. Erect, much branched ; Ivs. lin. ; cal. red ; pet. blush, long in bloom. 



6. CLARKIA, Ph. Calyx tube slightly prolonged beyond the ovary, 

 limb 4-parted, deciduous. Pet. 4, unguiculate, 3-lobed or entire, claws 

 with 2 minute teeth. Sta. 8. Sty. 1, filiform. Stig. 4-lobed. Capsule 

 largest at base, 4-celled,4-valved, many -seeded. -Q) Herbs (from Oreg. and 

 Cal.) with showy, axillary flowers. 



1 C. ruLctiELLA. Lvs. lin.-lanceolate: pet. 3-parted; 4 sterile sta. Fls. wh.,roae, or lilar 



