488 



ONAGRACEAE. 



[VOL. II. 



9. ANOGRA Spach, Ann. Sci. Nat. (II.) 4: 164. 1835. 



Low annual or perennial caulescent herbs. Stems often clothed with a papery bark. 

 Leaves alternate, entire or usually pinnatifid. Buds drooping; flowers perfect, white or pink, 

 usually axillary, diurnal. Calyx-tube elongated, gradually enlarged upward; calyx-segments 

 narrow, finally reflexed, the tips free or united in the bud. Stamens 8, equal in length; 

 filaments filiform; anthers linear. Ovary elongated, 4-celled; united styles filiform; stigma 

 deeply 4-cleft; ovules numerous, in i row, ascending. Capsules elongated, spreading or 

 ascending, 4-angled, loculicidal. Seeds ascending, in i row, terete. [Anagram of Onagra.] 



About 10 species, chiefly in southern North America. 



Tips of the calyx-segments not free in the bud. i. A. albicaulis. 

 Tips of the calyx-segments free in the bud. 



Throat of the calyx-tube villous within. 2. A. coronopifolia. 



Throat of the calyx-tube glabrous within. 3. A. pallida. 



i. 



Anogra albicaulis (Pursh) Britton. Prairie Evening-Primrose. 



2584.) 



(Fig- 



OEnothera albicaulis Pursh, Fl. Am. Sept. 



733. 1814. Not Nutt. 1818. 

 OEnothera pinnatifida Nutt. Gen. i: 245. 



1818. 

 Anogra albicaulis Britton, Mem. Torr. Club, 



5: 234. 1894. 



Diffusely branched at the base; branches 

 decumbent or ascending, more or less hir- 

 sutely pubescent or puberulent, whitish 

 and often shreddy, 4'-! 2' long. Basal and 

 lower leaves petioled, the upper sessile, 

 oblanceolate or lanceolate in outline, 

 deeply pinnatifid or the lowest repand- 

 dentate (rarely entire), i'-4' long; flowers 

 axillary, diurnal, i#'-3' broad, white, 

 becoming rose-color; petals obcordate or 

 emarginate; calyx-segments lanceolate, 

 not free in the bud, acuminate, hirsute, 

 finally reflexed, the throat naked; capsule 

 linear, i'-l#' long, about i" thick, hir- 

 sute or puberulent; seeds finely pitted. 



Prairies, Nebraska and Dakota to New 

 Mexico and Sonora. April-June. 



a. Anogra coronopifdlia (T. & G.) Brit- 

 ton. Cut-leaved Evening- Primrose. 

 (Fig. 2585.) 



OEnolhera coronopifolia T. & G. Fl. N. A. 1 : 495. 1840. 



Anogra coronopifolia Britton, Mem. Torr. Club, 5: 

 234. 1894. 



Erect, branched, 6 / -2 high, more or less hispid, 

 pubescent or canescent. Leaves lanceolate or ob- 

 lanceolate in outline, sessile or the lowest petioled, 

 6 // -2 / long, usually finely and deeply pinnatifid 

 into linear-oblong lobes; flowers axillary, white, 

 turning pink, 9 // -i5 // broad; calyx-segments linear, 

 the tips free in the bud, reflexed, the throat villous 

 within; petals broadly obovate; capsule oblong, 

 abruptly constricted at the top, straight, pubes- 

 cent and sometimes tuberculate, 4 // -io // long, about 

 2" thick; seeds tuberculate. 



Prairies, Nebraska and Colorado to Utah, south to 

 Kansas and New Mexico. June-Sept. 



