(ENOTHERA 



(ENOTHERA 



2331 



Ivs. narrow-oblanceolate and acuminate, usually 

 stalked, toothed or pinnatifid: fls. often larger, fra- 

 grant, the petals lobed. Cent, and S. Calif. 



VII. SUBGENUS MEGAPTERITJM. 



St.-bearing: stigma J^-de^t; calyx-tube very long and 

 slender, enlarging at the top: caps, very broad and 

 strongly J^-winged: fls. yellow, showy. 



10. missouriensis, Sims (CE. macrocdrpa, Pursh. 

 Megapterium missouriensis, Spach). Low perennial 

 with a hard base, the ascending sts. mostly 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 remotely 

 denticulate: petals 1-2 H in- long, very broad, yellow: 

 caps. 2-3 in. long and nearly as wide, broad-winged. 

 Mo. and Neb., west and south. B.M. 1592. Gn. 26, p. 

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



11. Havardii, Wats. Sts. numerous, short, slender 

 and simple or branching, rising from a branching caudex, 

 the plant canescent: Ivs. linear-lanceolate in a rosette, 

 narrowed toward either end, sinuate-pinnatifid : fls. 

 sessile, the buds erect, the calyx-tube with coherent 

 tips; petals J/-l in. long, yellow turning red: caps, 

 oblong-ovate, 4-angled and ribbed. Texas. 



VIII. SUBGENUS KNEIFFIA. 



St.-bearing: stigma deeply 4-lobed; calyx-tube very slender, 

 somewhat dilated at Die top: caps, rather small, 

 club-shaped, J^-angled or narrowly J+-wincjed: fls. 

 yellow, diurnal. 



A. Plant more or less glaucous, glabrous. 



12. glauca, Michx. (Kneiffia glauca, Spach). 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: caps, oblong, broad-winged, short-stalked, 

 Va., Ky., and south. B.M. 1606. Var. Fraseri, Torr. 

 & Gray (CE. Fraseri, Pursh), is a form with ovate- 

 lanceolate often slightly petioled Ivs. Southern states. 

 B.M. 1674. 



AA. Plant not glaucous, usually hairy or pubescent. 

 B. Caps, smooth, or bearing slight gland-tipped hairs. 



13. fruticosa, Linn. (Kneiffia fruticosa, Raim.). 

 SUNDROPS. Perennial (or sometimes biennial), erect 

 and more or less branchy, rather stout, 1-3 ft. high, 

 the terete usually reddish sts. somewhat villous: Ivs. 

 ovate to narrow-lanceolate, 3 in. or less long, firm, 

 usually acute, remotely denticulate or entire, mostly 

 sessile: fls. 1M~2 in. across and showy, in an elongating 

 cluster, with linear bracts: caps, oblong to obovate, 

 short-stalked or sessile, strongly winged. Dry soil, 

 Nova Scotia, south and west. B.M. 332. Very vari- 

 able. Var. Yotingii, Bailey (CE. Yoiingii, Hort.), is 

 common in cult., and is prized for its stocky growth and 

 profusion of bloom. It is a strong larger-lvd. plant, with 

 firm shiny slightly glaucous foliage, and bearing many 

 bright lemon-yellow fls.: 2 ft., much branched and 

 somewhat decumbent at base. Excellent. Var. major, 

 Hort., is a strong-growing floriferous form, forming a 

 dense bush-like specimen. 



14. piimila, Linn. (Kneiffia pumila, Spach). SUN- 

 DROPS. Slender erect biennial or perennial, 1-2 ft. high, 

 simple or branched: Ivs. oblanceolate or oblong, usu- 

 ally glabrous, entire, the radical spatulate: fls. an inch 

 or less across in a loose, leafy spike or raceme, the calyx- 

 tube shorter than the ovary, the petals obcordate: caps, 

 mostly clavate, short-stalked or sessile. Newfoundland, 

 south' and west. <E. Pflgrimii, Hort., appears to 

 belong with this species. It is very like CE. fruticosa var. 

 Youngii horticulturally, but in established plants it is 

 apparently somewhat taller and more branching, and 



the fls. not so large and color not so deep; it may be an 

 offshoot of CE. fruticosa. 



BB. Caps, grayish pubescent, the hairs glandless. 

 15. linearis, Michx. (CE. fruticosa var. linedris, Wats. 

 Kneiffia linedris, Spach). SUNDROPS. Fig. 2567. Slen- 

 der, 12-20 in. high, biennial or perennial, pilose, puberu- 

 lent or nearly glabrous: basal Ivs. spatulate to broad- 

 oblanceolate; st.-lvs. linear to narrow-lanceolate: fls. 

 bright clear yellow, 1^ in. or more across, standing 

 well above the foliage Ivs. ; petals obovate and notched 

 or emarginate at apex: caps, mostly less broadly winged, 

 clavate. Conn., south. Gn. 26, p. 481. In cult., this 

 is a neat and bright little plant, blooming in July. The 

 plant known in gardens as CE. fruticosa var. pallida 

 probably belongs with this species, or with the form of it 

 sometimes separated as Kneiffia Allenii, Small. 



2568. A sundrop 



CEnothera pratensis. 



(XK) 



16. pratensis, Rob. (Kneiffia pratensis, Small). Fig. 

 2568. SUNDROPS. A day-blooming perennial, 1-3 ft. 

 high, making a good clump and frequently planted 

 in yards: sts. sometimes branched above, with soft- 

 spreading hairs: Ivs. oblong-lanceolate to elliptic- 

 lanceolate, hairy, entire or sinuate, acute or obtuse: 

 fls. bright yellow, leafy-bracted, mostly clustered at 

 top of st.; tips of calyx hirsute; petals J^-l in. long, 

 obcordate: caps, club-shaped, hispid, sessile or nearly 

 so. Maine to Iowa and Ark. A good hardy plant for 

 early summer to midsummer bloom. 



IX. SUBGENUS HARTMANNIA. 



St.-bearing: stigma 4-lobed; calyx-tube funnelform, often 

 very long: caps, club-shaped or obovate, broad- 

 winged: fls. white, pink or red, diurnal. (Including 

 Xylopleurum, etc.). 



A. Plant canescent or villous, usually erect, or at least 

 prominently ascending. 



17. specidsa, Nutt. (Hartmdnnia specidsa, Small). 

 Perennial, with a rootstock, erect or ascending branches, 

 2 ft. or less high, canescent: Ivs. linear to lance-oblong, 

 4 in. or less long, remotely or sinuately dentate, or the 



