338 ONAGRACEAE (EVENING PKIMKOSE EAMILY) 



3. Onagra Jamesli (T. & G.) Small, 1. c. 840. Stems stout, canescently 

 strigillose, decumbent, 1-4 m. long, more or less branched: leaf-blades nar- 

 rowly oblong or lanceolate, 5-20 cm. long, often curved, acute, repandly 

 denticulate, the lower ones narrowed into short petiole-like bases, the upper 

 sessile or nearly so: calyx-tube stout, 5-11 cm. long: calyx-lobes nearly linear, 

 about half as long as the tube: corolla showy, yellow, turning to rose: cap- 

 sules tapering upward, 35-40 mm. long. — Southern Colorado and southward. 



6. ANOGRA Spach. White Evening Pbimbose ^ 



Caulescent annual or perennial herbs, often with a papery bark. Stems some- 

 times somewhat woody. Leaves alternate; blades usually pinnatifid. Buds 

 drooping. Flowers usually axillary, diurnal. Calyx-tube elongated; sepals 

 narrow.. Corolla white or pink. Ovary slender; ovules numerpus, in 1 row 

 in each cavity, ascending,.. Capsules elongate^, spreading or ascending, lo- 

 cuUcidal. Seeds terete.^Oenoi/i^a in part. , 



Calyx in bud merely acutish, the tips of its lobes not free. 



Capsule erect or ascending; seeds pitted . ' . , . . 1. A. albicaulia. 

 Capsule divaricate: seeds ,sinooth , , . . . . ; . , , 2. A. violac<^. 

 Calyx in bud acuminate or acute, the tips of its. lobes free. 

 Capsule linear-oylindric; throat of the calyK glabrous. 



Calyx glabrate, or sparsely hairy, or glandular-puberulent. 



Leaves deeply pinnatifid 3. A. rhizomata. 



Leaves subentire or toothed or some of them short-lobed. 



Capsule straight, ascending; leaves pubescent beneath . 4. A. Nuttallii. 

 Capsules divaricate, usually some of them contorted or • ■ - _ 



twisted; .leaves (glabrous . • .. ., . . . -5.. A. pallida. , .j - 

 Calyx villous or densely strigose. _ . • ,, 



Leaves, at least some of thfem, deepl;i^ pinnatifid . • ,6. A. trichocalyx.' ' " ' 

 Leaves subentire or sinuately toothed. 



Silvery-canescent ._;■., 7. A. cinerea. 



>Dark green and hispid-villous 8. A, neo-mexicana. 



Capsule oblong; throat of the calyx hairy; leaves rather finely 



pinnatifid , . . . . . -" . . 9. A. coronop'ifolia. 



1. Anogra albicauHs (Pursh) Brit. Mem. Torr. Club 5: 234. 1894. Stems 

 diffusely branched, the branches decumbent or ascending, 1-3 dm. lon'g, more 

 or less hirsute or puberulerit, with whitish and often shreddy bark: leaves al- 

 ternate; blades oblanceolate or lanceolate, deeply pinnatifid or the lower ones 

 repand-dentate (rarely entire), 2.5-10 cm. long: sepals lanceolate, acuminate, 

 hirsute, the tips not free in the bud: corolla 3.5-7.5 ctii. broad, white, becom- 

 ing rose-color: capsules linear-cylindric, 2.5-3.5 cm. long: seeds finely pitted. 

 Oenothera, pinnaiifida. (A. BuffumfiA. Nels. Bull. Toi^-. Bot. Club 27: 267. 

 1900.) — On the plains east of .the moimtains, Dakota to New Mexico. ' 



2. Anogra violacea A. Nels. Bull. Torr. Bot. Club 31: 242. 1904. Stems. 

 several to many, decumbent at base, 2-3 dm. high,'usually violet or purplish 

 (broadly splotched), appearing smooth but puberulgnt under a lens: crown 

 leaves rather small, linear-oblanceolate, entire or toothed; stem leaves pu- 

 berulent, dark .green, numerous, 4-8 cm. long,, linear-oblong or narrowly ob- 

 lanceolate, coarsely sinuate-dentate and some of them deeply pinnatifid; the 

 lobes acute, triangular to oblong: buds drooping, oblong or slightly Enlarged 

 towards the obtusish tip, pubescent with flat, crinkled hairs: calyx-Jobes a 

 little more than half as long as the tube: petals triangular-obcordate, sinas 

 broad and shallow, 15-20 mm. long, scarcely longer than the calyxrlobes, 

 white, drying pink: capsule subangulate, sinuate-tubercled on the margins. — 

 Sandy slopes and washes; Wyoming and Colorado., ;. 



3. Anogra rhizomata A. Nels. 1. c. 26: 240. 1899. Perennaal: rhizome 

 horizontal, long, thick, giving rise at intervals to short, obliquely ascending 

 stems: stems several, 1-2 dm. high, from pinkish to light violet, pubemlent: 

 leaves from nearly entire to deeply pinnatifid, linear-^oblong, 3-5 cm. long, 

 more or. less hispid-ciUate and puberulent: buds acute at apex, sometimes 

 glabrate -.calyx-tips free, lobes shorter. J;han the petals, usually much shortoi 

 than the tube: petals white or pink, suborbicular: capsule linear, somewhat 



