126 ORDER 54. ONAGRACE^E. 



0. mtiHrhta. Stem rough-hirsute ; petals "but little longer than the stair ens. 

 y. g-randinbra. St. branching ; pet. much longer than stem., deeply obcordate. t 

 3. pariiflora. Calyx tube elongated ; petals small, as long as the stamens. 

 . crucial a. Petals linear-oblong, shorter than the stamens. 

 . rantficrns. Petals enlarged ; whole plant canescently hairy. 



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



elliptical, pointed ; cal. tube 3-^1 times longer than ovary. Prairies, W. 2 3f. t 



3 CE. sinuata L. Pubescent, decumbent at base ; Ivs. oval-oblong, sinuate-dentate, 



or incised ; ffs. axillary, solitary ; tube twice longer than ovary. N. J. and S. 3 8>. 

 /3. minima. Low, simple, 1-flowered ; Ivs. snbentire. Pine-barrens, N. J. and S. 



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



calyx tube shorter than the oblong-clavate ovary. @ Meadows, Can. to Car. fr^-KX. 



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



lanceolate : cal. tube as long as the ovary ; pet. emarginate. N. Y. to Wis. 12 IS'. 



6 CE. f ruticosa L. St. rigid, hairy or downy ; Ivs. lance-oblong ; rac. corymbed ; fls. 



IS" diam. ; pod oblong-clavate, 4-winged, 4-ribbed, pedicellate. 7f Hard soils. 1 3f. 



7 CE. ripckria N. St. slender, branched, purple, and polished ; Ivs. lin. -lanceolate, pcti- 



olate, denticulate ; rac. corymbed; fls. large (IS"). Banks, N. J., and S. 1 2f. May + . 



8 CE. llnearls MX. Hoary-puberulent, subsimple; Ivs. linear, snbentire, obtuse ; fls. 



large, corymbed ; pod obovold. y Montank Pt. to Tenn., and S. 1 l$f- May, June. 



9 CE. glanca MX. Smooth, glaucous ; Ivs. ovate, sessile, pointed ; fls. large, clustered 



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



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

 very large (40, 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. 



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



1 3 CE. SPECIOSA. Lvs. pinnatifid below ; fls. diurnal, white, fading red. if. Ark. IS 7 . 

 \4 CE. TETRAPTERA. Lvs. pinnatifid below ; fls. nocturn., large, pure wh. (T)Mex. l-2f. 



CE. RUBICUKDA. Erect; Ivs. lance-linear ; pet. rose-pnrp., orange at base. Cal. 2f. 

 6 CE. LINDLEYI. Diffusely branched ; Ivs. lance-lin. ; pet. lilac, red at base. Cal. If. 



17 CE. VINOSA. Erect; Ivs. linear-oblong ; pet. white-roseate ; fls. 2' broad. (T)Cal. 2f. 



18 CE. LEPIDA. Erect, simple; Ivs. lance-obi. ; pet. pale-pnrp., 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, decli- 

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

 abortion, 1-celled, 1-4-seeded. Herbaceous or shrubby. Lvs. alternate. 

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



1 G. foiennis 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. filipes 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. angnstifolia MX. Pubeswrt ; 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 G. LIXDHEIMERI. 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. - Herbs (from Greg, and 

 Cal.) with showy, axillary flowers. 



1 C. PULCHELIA. Lvs. lin.-lanceolate ; pet. 3- parted ; 4 sterile pta. Fls. wh., rose, or Hlao 



