ORDER 52 ONAGRACE^E. 353 



4 CE. pumila L. Low, pubescent; st. ascending; Ivs. lanceolate, entire, bbtuse, 

 attenuate at base ; spike loose, leafy, naked below ; cal. tube slwrter than the sub- 

 sessile, oblong-clavate, angular ovary. (f) A small, half-erect plant, common in 

 grass lands, Can. to S. Car. St. 6 to 10' long, round, slender, simple. Lvs. 1 to 

 1^' by 2 to 3", radical ones spatulate, petiolate. Fls. yellow, 6'' diam., opening 

 in succession, 1 or 2 at a time. Jn., Aug. (CE. pusilla ? MX.) 



5 CE. chrysantha MX. St. ascending, slender; fls. small, crowded, spicate; 

 cal. tube equaling in length the ovary, longer than the segm. ; petals broadly obo- 

 vate, emarginate, longer than the stamens ; caps, smooth, pedicellate, clavate, tho 

 alternate angles slightly winged. Western N. Y. to Mich. St. 12 to 18' long, 

 purple. Lvs. lanceolate, obtuse, attenuate at base, denticulate, radical one.; 

 spatulate. Fls. 5'' diam., orange-yellow. Jn., Jl. 



6 CE. fruticosa L. Si. pubescent or hirsute ; Ivs. oblong-lanceolate, repand-denti- 

 *ulate ; rac. leafy or naked below, corymbed ; caps, oblong-clavate, 4-winged, 

 with intermediate ribs, pedicellate. 2 In sterile soils, Mass., Conn., N. Y. to 

 Fla, and ~\V. States. St. hard, rigid (not shrubby), 1 to 3f high. Lvs. variable 

 in pubescence, form and size, 1 to 3' by 3 to 8", sessile, minutely punctate. Fls. 

 few or many, H' diam., in. a terminal, bracteate, mostly pedunculate raceme. 

 Cal. tube longer than tho ovary. Petals broad-obcordate, yellow. Jn., Aug. 



0. AMBIGUA. Lvs. membranous ; petals longer than broad. 



1 CE. riparia Nutt. Nearly glabrous ; stem erect, with slender branches, usually 

 purple and polished; Ivs. linear-lanceolate, acutish at both ends, petiolate, repand- 

 denticulate, coriaceous ; fls. large, loosely corymbed, at length racemed ; cal. tubo 

 nearly twice longer than the pedicelled ovary ; caps, clavate, scarcely winged. 

 Along rivers, N. J. to Fla, and Ala. St. 1 to 2f high. Lvs. 2 to 4' long. Fls. 

 as large as in No. 6. A handsome species. May, Jn. 



8 CE. linearis MX. Hoary puberulent; st. slender, erect, simple or few- 

 branched; Irs. linear, subentire, obtuse, the lowest linear-spatulate ; fis. large, 

 cqrymbed at the summit of the branches, tube of the calyx somewhat longer than 

 ths pedicellate ovary ; fr. obovate, scarcely winged. If Montauk >oint to N. 

 Car. (Miss Carpenter), and Ala. St. 12 to 18' high. Lvs. 1 to 2' long. Fls. 

 much as in No. 7. May, Jl. 



9 CE. glauca MX. Glabrous and glaucous ; st. erect, with few. slender branches 

 above ; Ivs. ovate, sessile, acute or acuminate, obscurely denticulate ; fls. large, 

 clustered at the ends of the branches ; calyx tube 3 or 4 times the length of the 

 ehort, pedicellate ovary ; caps, oval, 4-winged above. Rock Castle Co. Ky. to 

 Va, and N. Car. St. stout, 2 to 3f high, purplish. Lvs. 2 to 3' long, often lan- 

 ceolate. Caps. 4 to 5" by 2 to 3". May JL 



10 CE. Missouriensis Sims. Simple, decumbent; Ivs. coriaceous; lanceolate, 

 acute, or short-acuminate, petiolate, subentire, downy canescent when young ; fls. 

 very large, axillary ; cal. tube 3 or 4 times longer than the downy-canescent 

 ovary; caps, very large, oval, depressed, with 4 broad- winged margins. Dry 

 hills, Mo. Remarkable for the magnitude of its fls. and fruit. Petals yellow, 

 expanding 4 inches. Cal. tube 4 to 7' long. Caps. 2' long. Sds. large, crested, 

 in one row iu each cell. Jl. Oct. j 



CE. speciosa cf Ark. and Tex. is a splendid species, with white cr roseato 

 fls., fine in cultivation. 



GAU'RA, L. (Gr. yavpoc, superb.) Calyx tube much prolonged 

 above tbe ovary, cylindric, limb 4-cleft ; petals 4, unguiculate, some- 

 what unequal, inserted into the tube ; stamens 8, declinate, alternate 

 ones a little shorter ; ovary oblong, 4-celled, one only proving fruitful, 

 nut usually by abortion, 1 -celled, 1 to 4-seeded. Herbaceous or shrubby. 

 Lvs. alternate. Fls. white and red, rarely trimerous. 



1 G-. biennis L. St. branched, pubescent ; Ivs. lanceolate, oblong, remotely den- 

 tate ; spike crowded ; cal. tube as long as the segm. ; petals rather declinate, and 

 shorter than the sepals : fr. subsessile, slightly acuminate, 8-ribbed, alternate ribs 

 minute. A beautiful biennial, on the dry banks of streams, Can. to Ga., rare. 

 St 3 to 5f high. Lvs. sessile, pale green, acute at each end. Fls. numerous, 

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