OF THE WASATCH REGION 63 



2. E. adenocaulon Haussk. Erect, much -branched, leafy, 

 producing- rosettes or turions; more or less white-hairy above 

 (the inflorescence and capsules glandular-pubescent); 1-3 ft. 

 high; often purplish. Leaves often erect; lanceolate-elliptical 

 or ovate-lanceolate; mostly abruptly rounded into a short 

 petiole; 2-6 inches long-. Flowers numerous; small; axillary 

 and otten nodding. Petals white or pink, notched at apex. 

 Seeds abruptly short-beaked with white coma. In water near 

 springs. May-October. 



2. OENOTHERA. Evening Primrose. 



Leaves alternate or all basal. Calyx-tube prolonged above 

 the ovary. Calyx-lobes 4, reflexed; often remaining united at 

 the apex. Stamens 8, the anthers mostly versatile. The pollen 

 often clings together like a spider's web. Flowers showy; 

 yellow, white or rose-color. Stigma capitate or with 4 linear 

 divisions. Capsule loculicidal. 



Leaves alternate (or some basal). 



Stigma deeply 4-cleft, its segments linear; biennials. 

 Flowers yellow; ovules and seeds horizontal. 



Petals not over an inch long 1. O. wtrigosa 



Petals as much as l 1 /^ inches long. ... 2. O. Hooker! 

 Flowers white; ovules and seeds ascending 3. O. pallida 



Stigma capitate; annual 4. O. utaliensis 



Leaves all basal. 



Flowers yellow 5. O. stibacaulis 



Flowers white (becoming rose-color in age). 



Plant smooth; leaves somewhat leathery 6. O. caespitosa 

 Plant hairy; leaves not at all leathery. . 7. O. marginal a 



1. O. strigosa (Rydb.) (O. muricata canescens (T. & G.) 

 Robinson.) Plant beset with rigid grayish hairs; 16-40 in. 

 high. Basal leaves obovate or spatulate with obtuse apex; 

 stem-leaves lanceolate to oblanceolate with acute apex and 

 wavy margins. Spike many-flowered, leafy-bracted. Calyx- 

 segments with short, free tips. Corolla yellow;, not turning 

 rose-color on fading. In rich, usually moist soil in open places. 

 -June-October. 



2. O. Hooker! T. & G. (O. biennis hirsutissima A. Gray; 

 Onagra Hookeri (T. & G.) Small.) Plant hairy; stems erect, 

 stout, usually unbranched. Leaves lanceolate to ovate-lance- 

 olate; acute to acuminate, wavy-margined and minutely toothed. 

 Spike many-flowered, leafy-bracted. Calyx-segments acumi- 

 nate. Corolla yellow, usually tinged with red, especially when 

 fading. In open ground. May-August. 



3. O. pallida Lindl. (O. albicaulis Nutt.; O. Nuttallii Sweet; 

 Anogra Nuttallii (Sweet) A. Nelson; Anogra pallida Britton). 

 A perennial with stems erect or sometimes straggling, usually- 

 branched, white and shreddy; glabrous or puberulent, or some- 

 times with a few scattered hairs. Leaves linear or narrowly 

 lanceolate; entire, repand or pinnately-lobed; sessile or the 

 lowermost petioled. Flowers axillary, drooping while in the 

 bud. Calyx-lobes linear, the tips free in the bud. Throat of 

 calyx glabrous. Petals nearly round; entire or notched; white, 

 turning to rose-color after fertilization of ovules. Capsule 

 curved; seds smooth; in 1 row. Dry sandy soil of plains. 

 Mny -October. 



