ONAGRACEAE. 659 



capsule linear. 2.5-3.5 cm. long, about 2 mm. thick; seeds finely pitted. Prairies, 

 N. Dak. and Neb. to X. Mex. and Sonora. April-June. 



2. Anogra coronopifolia (T. & G.) Britton. Cut-leaved Evening-prim- 

 rose. (I. F. f. 2585.) Erect, branched, 1.5-6 dm. high, more or less hispid or 

 canescent. Leaves lanceolate or oblanceolate in outline, 1.2-5 cm - l° n g> usually 

 finely and deeply pinnatifid into linear-oblong lobes; flowers white, turning pink, 

 1.8-3 cm. broad; calyx-segments linear; petals broadly obovate; capsule oblong, 

 abruptly constricted at the top, straight, 8-20 mm. long, about 4 mm. thick; seeds 

 tuberculate. Prairies, S. Dak. to Colo., Utah, Kans. and N. Mex. June-Sept. 



3. Anogra pallida (Lindl.) Britton. White-stemmed Evening-primrose. 

 (I. F. f. 2586.) Erect. 1.5-12 dm. high; stems white or pale, rarely with scattered 

 hairs, the bark often shreddy. Leaves linear or oblong-linear, entire, repand or 

 somewhat pinnatifid, 2.5-8.5 cm. long; flowers white, turning pink, 2.5-3.5 cm - 

 broad; segments of the calyx linear; petals nearly orbicular ; capsule linear, curved, 

 2.5-5 cm - l° n &- aDout 3 mm - thick; seeds smooth. Prairies, Minn, to Br. Col., 

 Neb., Mex. and Cal. May- Aug. 



10. KNEIFFIA Spach. (See Appendix.) 



Usually slender annual or perennial caulescent shrubby herbs. Leaves mostly 

 narrow, entire or toothed. Buds mostly erect. Flowers yellow, diurnal, in ter- 

 minal spikes or racemes. Calyx-tube slender. Ovary usually club-shaped, 4- 

 angled; ovules numerous, on slender stalks, in many rows. Capsules club-shaped, 

 or oblong by the wings. 4-winged or rarely sharply 4 angled. Seeds not angled, 

 without a tubercle. [In honor of Prof. C. Kneiff. of Strassburg, who wrote oncrypto- 

 gamic botany.] About 10 species, mostly in temperate N. Am. 



Stem-leaves filiform-linear; capsules 4-angled or very slightly 4-winged. 



1. K. linifolia. 

 Stem-leaves never approaching filiform ; capsules prominently winged. 



Capsules club-shaped. 



Pedicels and capsules pubescent. 



Stems decumbent, spreading ; body of the capsule becoming subglobose. 



2. K. A I lent. 

 Stems erect or nearly so ; body of the capsule more or less elongated. 



Pedicel longer than the body of the capsule, the wings thick and pubes- 

 cent. 3. K. longipedicellata. 

 Pedicel shorter than the body of the capsule, the wings thin and gla- 

 brous. 4- A", linearis. 

 Pedicels and capsules glabrous or glabrate. 5. K. pumila. 

 Capsules oblong or nearly so. 



Plants not glaucous, usually pubescent; capsules less than 8 mm. long. 



6. K.fruticosa. 

 Plants somewhat glaucous, glabrous; capsules more than 10 mm. long. 



7. K. glauca. 



1. Kneiffia linifolia (Nutt.) Spach. Thread-leaved Sundrops. (I. F. f. 

 2587.) Erect, very slender, 1-5-4-5 dm. high, finely pubescent above. Stem- 

 leaves filiform linear, entire, 12-30 cm. long; basal leaves tufted, oblanceolate or 

 spatulate, about 2.5 cm. long; flowers in loose spike-like racemes, 6-8 mm. broad; 

 calyx-tube rather shorter than the ovary; stigma-lobes very short; capsule obovoid, 

 puberulent. sharply 4-sided, 4-6 mm. long. In dry soil, 111. to Kans., Ga., La. 

 and Tex. May-July. 



2. Kneiffia Alleni (Britton) Small. Allen's Sundrops. (I. F. f. 2588.) Low, 

 appressed-pubescent; stems decumbent, diffusely branched, 0.8-6 dm. long, zigzag. 

 Leaves oblanceolate to lanceolate, 1.2-3 cm. long, undulate; flowers about 2.5 cm. 

 broad; calyx villous, its tube 4-6 mm. long, its segments linear-oblong, as long as 

 the tube; petals orbicular-obovate; capsules club-shaped. 6-8 mm. long, the body 

 winged, shorter than the pedicel; seeds obovoid to oblong, minutely pitted in rows. 

 In sand, eastern L. I. June-Aug. 



3. Kneiffia longipedicellata Small. Long-stemmed Sundrops. (I. F. f. 

 2589.) Slender, puberulent; stems erect or assur^ent, 3-8.5 dm. tall. Basal leaves 

 spatulate or obovate-spatulate, 3.5-7.5 cm. long; stem leaves few, linear-lanceolate, 

 2.5-6.5 cm. long, entire, sometimes undulate; flowers yellow. 2.5 5 cm. broad; 

 calvx hirsute; petals emarginate; capsules narrowly obovoid, the body about IO 



