1120 



CENOTHERA 



CENOTHERA 



3. cheiranthifdlia, Hornem. Stems decumbent or as- 

 cending, 2 ft. or more tall, canescent: Ivs. thick, about 

 1-2 in. long, broad -ovate to lanceolate or the lower ones 

 spatulate, the upper ones becoming sessile, most of 

 them entire: petals yellow, %-% in. long: capsule % 

 in. or less long, curved, somewhat hairy. Calif. B.R. 

 12:1040. 



III. SUBGENUS MERIOLIX. Stem-bearing: stigma disk- 

 like but 4-toothed : calyx-tube shorter than the 

 ovary, enlarging upward: capsule linear or 

 nearly cylindrical, sessile: fls. yellow, axillary. 



4. serrulata, Nutt. Slender, simple or branched, 

 about 1 ft. high but variable in stature, nearly glabrous 



to canescent: Ivs. linear to lanceolate, 

 1-3 in. long, usually acute, attenuate to 

 the base, sharply dentate : petals broad - 

 obovate, 34 in. long, wavy -margined. 

 Minn., west and south. Biennial or 

 perennial. Mn. 7:41. 



IV. SUBGENUS ONAGRA. Stem-bear- 

 ing : stigma 4-cleft : calyx-tube 

 elongated and cylindrical, en- 

 larging at the throat: capsule 

 linear-oblong to long-conic, 4- 

 angled: fls. yellow, opening in 

 evening. TRUE EVENING PRIM- 

 ROSES. 



5. biennis, Linn. COMMON EVENING 

 PRIMROSE. Fig. 1514. Tall, strong, 

 simple or branching biennial (often 

 45 ft.), closely pubescent or some- 

 what hairy: Ivs. lanceolate to oblong 

 to ovate-lanceolate, often 6 in. long, 

 acute, remotely denticulate, the low- 

 est ones petioled: calyx-tube 1-2 in. 

 or more long: petals bright yellow, % 

 in. or less long: capsule pubescent or 

 hairy, often 1 in. long. Generally dis- 

 tributed, and now a common weed in 

 the Old World. Gn. 26, p. 480. -The 

 fls. open suddenly at nightfall. It is a 

 weedy plant and has little to recom- 

 mend it to cultivation, although it is 

 offered by dealers. In France the 

 thickened roots are mentioned as an 

 edible vegetable, to be used after the 

 manner of salsify or vegetable oyster. 

 The root should be eaten, according to 

 Vilmorin, "at the end of the first year 

 of its growth." 



Var. grandifldra, Lindl. ((E. La- 

 1514. Capsules of marckidna, Ser.). Fls. much larger, 

 evening Prim- the petals 1-2% in. long. Very showy 

 rose (X %). when the fls. open. Commoner west- 

 ward. B.M. 2068. B.R. 19:1604. Gn. 

 26, p. 482; 46, p. 64. 



V. SUBGENUS CENOTHERA. Stem - bearing : stigma 



deeply 4-cleft: calyx-tube very long and filiform 

 or linear: capsule narrow -cylindric, obtusely 

 4-angled, with numerous seeds in 2 rows in each 

 locule: fls. yellow, mostly showy. 



6. Drummondii, Hook. Fig. 1515. One to 2 ft., from 

 an oblique or decumbent base, loosely pubescent: Ivs. 

 lance-oblong or oblanceolate, acute, either gradually or 

 abruptly tapering into a short petiole, entire or slightly 

 toothed: calyx-tube usually 2 in. long and very narrow: 

 fls. 2-3 in. across, nocturnal, bright yellow, showy: cap- 

 sule 1-2 in. long. Texas. B.M. 3361. Perhaps biennial, 

 but grown as an annual. 



VI. SUBGENUS ANOQRA. Stem-bearing: stigma deeply 



4-cleft: calyx-tube elongated and enlarging up- 

 wards: capsule oblong or linear: fls. white or 

 pink, opening by day. 



7. albicaulis, Pursh (CE. pinnatifida, Nutt.). Low 

 (1 ft. or less tall), stems white and shreddy, the branches 

 ascending, slightly pubescent or sparsely hairy: Ivs. 

 lanceolate, oblanceolate or lance-oblong in outline, 

 deeply pinnatifld or some of the larger ones only 

 strongly toothed, 4 in. or less long, sessile or nearly so : 



fls. large (3 in. or less across), diurnal, white and fading 

 to rose, the petals obcordate. Prairies, west. B.R. 

 14:1142 (as (E. pallida). 



8. Calif 6rnica, Wats. ((E. albicaulis, var. Califdrnica, 

 Wats.). Smaller and hoary-pubescent or villous, the 

 stems only 3 or 4 in. long: Ivs. narrow-oblanceolate and 

 acuminate, usually stalked, toothed or pinnatitid: fls. 

 often larger, fragrant, the petals lobed. Central and 

 southern Calif. 



VII. SUBGENUS MEGAPTERIUM. Stem-bearing: stigma 



4-cleft: calyx-tube very long and slender, en- 

 larging at the top: capsule very broad and 

 strongly 4-winged: fls. yellow, showy. 



9. Missouri6nsis, Sims ((E. marrocdrpa, Pursh). 

 Low, with a hard base, the ascending stems usually not 

 over 1 ft. long, usually pubescent: Ivs. thick, varying 

 from oval to linear to narrow-lanceolate, 5 in. or less 

 long, acuminate, narrowed to a petiole, entire or re- 

 motely denticulate: petals 1-2 K in. long, very broad, 

 yellow: capsule 2-3 in. long and nearly as wide, broad- 

 winged. Mo. and Neb. to Tex. B.M. 1592. Gn. 26, p. 

 480. R.H. 1857, p. 598. 



VIII. SUBGENUS KNEIFFIA. Stem - bearing : stigma 



deeply 4-lobed: calyx-tube very slender, some- 

 what dilated at the top: capsule rather small, 

 club-shaped, 4-angled or narrowly 4-winged: 

 fls. yellow, diurnal. 

 A. Plant more or less glaucous, glabrous. 



10. glauca, Michx. Erect perennial, 2-3 ft. : Ivs. ovate 

 to ovate-oblong, 4 in. or less long, acute or somewhat 

 obtuse, sessile, remotely denticulate : fls. large, in short 

 leafy clusters, the calyx-tube about % in. long; petals 

 an inch long, more or less emarginate: capsule oblong, 

 broad winged, short-stalked. Va., Ky., and south. B.M. 

 1606. -Var. Fraseri, Torr. &Gray ((E. Fraseri, Pursh), 

 is a form with ovate-lanceolate often slightly petioled 

 Ivs. Southern states. B.M. 1674. 



1515. CEnothera Drummondii (X%). 



AA. Plant not glaucous, usually hairy or pubescent. 

 11. fruticdsa, Linn. SUNDROPS. Perennial (or some- 

 times biennial), erect and more or less branchy, rather 

 stout, 1-3 ft. high, the terete usually reddish stems 

 somewhat villous : Ivs. ovate to narrow-lanceolate, 3 in. 

 or less long, firm, usually acute, remotely denticulate 

 or entire, mostly sessile: fls. l%-2 in. across and showy, 

 in an elongating cluster, with linear bracts: capsule 

 oblong to obovate, short-stalked or sessile, strongly 

 winged. Dry soil, Nova Scotia, south and west. B.M. 



