126 ORDER 54. OXAGRACE.E. 



ft. muricata. Stem rough-hirsute ; petals but little longer than the stair enp. 



y. g-randi flora. St. branching ; pet. much longer than stam., deeply ob(ordate. t 



&, parviflora. Calyx tube elongated ; petals small, as long as the stamens. 



F. cruclata. Petals linear-oblong, shorter than the stamens. 



C cantscen*. Petals enlarged ; whole plant canesccntly 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. simiiila L. Pubescent, decumbent at base ; Ivs. oval-oblong, sinuate-dentate, 



or incised ; fls. axillary, solitary ; tube twice longer than ovary. (I) N. J. and S. 38'. 

 - )3. minima. Low, simple, 1-flowered ; Ivs. subentire. Pine-barren?, N. J. and S. 



4 CE. pit ml la. L. Low, pubescent, half-erect ; Ivs. lanceolate ; fls. fi'', in a leafy spike ; 



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



5 CE. clirysantlia 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. frutlcosa L. St. rigid, hairy or downy ; Ivs. lance-oblong ; rac. corymbed ; flp. 



H^diam. ; pod oblong-clavate, 4-winged, 4-ribbed, pedicellate, u Hard soils. 1 3f. 



7 CE. riparia 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. May + . 



8 CE. linearis MX. Hoary-puberulent, subsimple; Ivs. linear, subentire, obtuse ; fls.. 



large, corymbed ; pod obovolcl. n Montauk Pt. to Tenn., and S. 1 IJf. May, June. 



9 GE. glauca MX. Smooth, glaucous ; Ivs. ovate, sessile, pointed; fls. large, clustered 



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



10 CE. MISSOURIENSIS Sims. Simple, decumbent; Ivs. thick, lanceolate, petiolate; fla. 

 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. 



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. it Ark. 18'. 



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

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



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



17 CE. VINOSA. Erect; Ivs. linear-oblong ; pet, white-roseate ; fls. 2' broad. Cal. 2f. 



18 CE. LEFIDA. 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-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. blennls 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. fillpes Spach. Paniculate and naked above; Ivs. linear-oblong, tufted at thn 



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. angustifolia MX. Pubesccct; 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. 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. - Herbs (from Oreg. and 

 Cal.) with showy, axillary flowers. 



1 C. rui.cHELLA. Lvs. lin. -lanceolate; pet. 3- parted ; 4 sterile eta. Pis. wh.,rose, or lilar; 



