232 ONAGRACE.E. sphjsrostigma. 



* Flowers white or rose color, in a nodding spike : tube of the 

 calyx funnel form : capsule narrowly linear, terete, much contorted: 

 seeds linear acute at each end. 



S. alyssoides Walp. Rep. ii, 78. Oenothera alyssoides H. & A. Can- 

 escently pubescent annual: stems 1-12 inches high, branching from the 

 base: leaves oblanceolate or oblong-lanceolate, 1-3 inches long, attenuate 

 into a slender petiole, entire or repand-denticulate ; the bracts much 

 smaller but similar: spikes many-flowered, elongating in age; tube of the 

 calyx'2-3 lines long, equalling the orbicular entire white petals: capsule 

 puberulent, 8-12 lines long, very slender : seeds nearly white, very minutely 

 pitted. On sandy plains Southeastern Oregon to Nevada, Idaho and Utah. 



S. JtJoothii Walp 1. c, 77. Very viscidly pubescent annual; branch- 

 ing from the base, 2-4 inches high ; leaves ovate, 6-12 lines long, acute or ac- 

 cumulate; denticulate, shortly petioled; tube of the calyx 1-3 lines long; petals 

 rose-color, 2-3 lines long; capsule linear-fusiform, 6-9 lines long, viscid- 

 glandular, much contorted ; seeds brownish, angled, very minutely tuber- 

 culate. On dry hillsides, Eastern Oregon and Washington to California 

 and Nevada, 



* * Flowers yellow becoming greenish or bluish in age : calyx- 

 tube obconic: capsule linear, tetragonal, more or less contorted: stems 

 leafy throughout. 



S. spirale Walp. Rep. ii, 77. CEnothera cheiranthifolia Hornem. 

 Stems decumbent, spreading, often 2 feet long or more, canescently 

 pubescent: leaves thick, 6-.,0 lines long, broadly ovate to oblong or lanceu- 

 late, the radical and lower cauline often spatulate or oblanceolate and 

 slender petioled, mostly entire: calyx canescent, its tube 1-2 lines long; 

 petals 3-4 lines long, yellow becoming bluish : capsule 4-S lines long, sub- 

 hairy, contorted : seed ovate oblong, acute at base, smooth. Along the 

 coast, Southern Oregon and California. 



* * * Flowers small, yellow usually turning red, calyx-tube very 

 short; capsule elongated, very narrowly linear slightly curved. 



$. contorta Walp. 1. c. 78. CEnothera striguloia T. <£ G. Nearly 

 glabrous; the ovary and, calyx usually somewhat appressed-pubescent : 

 stems slender, ascending or' erect, usually divaricately branched, 2-12 

 inches high: leaves linear or lanceolate, 3-D lines long, attenuate at base, 

 entire or sparingly denticulate, flowers very small: petals 1-2 lines long, 

 usually turning red in age: capsule 8-13 lines long, sessile or attenuaie 

 into a very short pedicel, scarcely attenuate above, more or less curved 

 or contorted: seeds smooth. On dry sandy plains Eastern Washington 

 to California, Nevada and Arizona. 



Var. pubens Small 1. c 189; Pubescence hirsute and spreading es- 

 pecially below, often subglandular above, sometimes very smooth. Van- 

 couver Island to Nevada; Arizona and {Southern California. 



Var. Grwenei Small 1. c strictly erect with ascending somewhat vir- 

 gate branches : pubescence neither white nor appressed, but spreading and 

 hirsute : pods longer and slender. Oregon to California. 



* * * * Low, flowers minute: capsule fusiform, short. 



S. Hilgardi Small 1. c 188. CEnothera Hilgardi Greene. Canescently 

 pubescent; stems $-6 inches high, divaricately much branched: leaves 

 finear-spatulate, entire including the petiole 1-2 inches long: branches 

 corymbose in flower, densely spicate in fruit, the spikes leafy; petals 1-2 

 lines lon<r, obovate. entire: capsule 6 lines long, straight, sharply angled, 

 attenuate upward; seeds obovate pale, smooth and shining. In moist 

 places Eastern Washington and Oregon. 



