OXAGRACEAE. 



VOL. II. 



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



Low caulescent herbs. Stems often clothed with a papery bark. Leaves alternate, entire 

 or usually pinnatilid. Buds drooping; flowers perfect, white or pink, usually axillary, diurnal. 

 Calyx-tube elongated, gradually enlarged upward, calyx-segments narrow, finally reflexed, 

 the acute 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. Type species : Anogra Douglasiana Spach. 

 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. 



Capsules narrowly ascending ; leaves linear, entire or, nearly so. 3. A. Nuttallii. 



Capsules widely spreading; leaves lanceolate, dentate. 4. A.latifolia. 



i. Anogra albicaulis (Pursh) Britton. Prairie Evening-Primrose. Fig. 3045. 



Oenolhera albicanlls Pursh, Fl. Am. Sept. 733. 

 1814. 



Oenothera pinnatifida Nutt. Gen. i : 245. 1818. 



Anogra albicaulis Britton, Mem. Torr. Club 5 : 

 234. 1894. 



Annual or biennial, diffusely branched at 

 the base ; branches decumbent or ascending, 

 more or less hirsutely pubescent or puberu- 

 lent, 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, ii'-3' broad, white, becom- 

 ing rose-color ; petals obcordate or emar- 

 ginate; calyx-segments lanceolate, not free 

 in the bud, acuminate, hirsute, finally re- 

 flexed, the throat naked ; capsules linear, 

 l'-ii' long, about i" thick, hirsute or pu- 

 berulent; seeds finely pitted. 



Prairies, North Dakota to Nebraska, New 

 Mexico and Sonora. April-June. 



2. Anogra coronopifolia (T. & G.) Britton. 

 Cut-leaved Evening-Primrose. Fig. 3046. 



Oenothera coronopifolia T. & G. Fl. N. A. i : 495. 1840. 

 Anogra coronopifolia Britton, Mem. Torr. Club 5 . 234. 



1894. 

 Raimannia coronopifolia Rose, Contr. Nat. Herb. 8: 330. 



1905. 



Perennial, erect, branched, 6'-2 high, more or less 

 hispid, pubescent or canescent. Leaves lanceolate or 

 oblanceolate 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"-is" broad; calyx-segments linear, the tips 

 free in the bud, reflexed, the throat villous within ; 

 petals broadly obovate ; capsules oblong, abruptly con- 

 stricted at the top, straight, pubescent and sometimes 

 tuberculate, 4"-io" long, about 2" thick ; seeds tuber- 

 culate. 



Prairies, South Dakota to Colorado, Utah, Kansas and 

 New Mexico. June-Sept. 



