CHYLISMA. 

 PACHYLOPHUi 



ONAGRACEJE. 233 



S. andinum Walp 1. c. 79. (Enothera andina Nutt. Canescently 

 pubescent throughout: sterns slender, 1-3 inches high, becoming dimusely 

 branched: leaves linear-spatulate 6-12 lines long, attenuate into a slender 

 petiole : spikes mostly dense, many-flowered : flowers yellow, barely a line 

 long : capsule 3-6 lines long, attenuate upward from near the base : seeds 

 linear-oblong, nearly smooth. On alkaline plains, eastern "Washington to 

 Nevada, Montana and Utah. 



9 CHYLISMA Nijtt. Raimann, Engl. & Prantl, Nat. Pfl. Fam. iii, 217. 



Caulescent annuals with pinnate or simple leaves and yellow 

 flowers in terminal racemes. Calyx-tube funnel-form or obconic, 

 the limb 4-parted. Petals 4,e*ntire. Stamens 8, unequal; anthers 

 oblong, attached near the middle. Stigma capitate, entire. Cap- 

 sule linear, subcylindrical or subclavate, obtuse, membranaceous, 

 not sessile, seeds ascending, in a single row in each cell. 



C. seapoidea Small 1 c. 193. (Enothera scapoidea Nutt. Puberulent 

 or subglabrous : stems erect, 4-18 inches high, usually branching from 

 near the base: leaves mostly subradical, long-petioled. lyrately pinnatifid, 

 or sometimes undivided, the terminal segment much the longest, o\ T ate 

 to oblong-lanceolate, cuneate to cordate at base, irregularly serrate, the 

 prominent veins often dark colored, the lateral leaflets few to many or 

 none, very irregular in size and shape: racemes at first nodding, the bracts 

 very small or wanting; calyx-tube funnel form with a narrow base, 1-2 

 lines long, the bud closed and abruptly acute ; petals yellow, 1-2 lines long: 

 capsule glabrous, 4-12 lines long, attenuate into a pedicel 2-8 lines long, 

 ascending or divaricate. Idaho and Wyoming to Utah and Southern Cali- 

 fornia. 



C. cruciformis. Oenothera crucif'frmis Kll- CE. scpoidea Var. pur- 

 purascens Watson. Stems erect, 6-18 inches high, stoutish usually branch- 

 ing from near the base : leaves mostly subradical, long-petioled, lyrately 

 pinnate, the terminal leaflets much the largest; lateral few to several 

 or none, very irregular in size and shape, racemes at first nodding, the 

 bracts very small or wanting, calyx-tube funnelform with a narrow base, 

 2-3 lines long; the bud abruptly acuminate, petals white or pinkish, rarely 

 yellowish, 3-4 lines long: capsule glabrous, 4-12 lines long, somewhat 

 clavate, on pedicels 2-10 lines long On alkaline plains, Southeastern 

 Oregon to Nevada and Southern California. 



10 'PACHYLOPHUS Spach. Hist. Veg. iv, 365. 



Acaulsscent or very short caulescent perennials with entire or 

 pinnatifid leaves and large white or rose-color flowers that open 

 only at night or in cloudy weather. Calyx-tube elongated, some- 

 what dilated at the throat, the limb 4-parted, erect in the bud. 

 Petals 4, sessile white, changing to red in age. Stamens 8, un- 

 equal : anthers oblong attached near the base. Capsule ovate or 

 ovate-oblong, large and rigid, obtusely tetragonal or sharply 

 angled, mostly sessile. Ovules horizontal, sessile few, in one or 

 two rows. Seeds large, with a deep furrow along the raphe. 



P. Xuttallia Spach. Hist. Yeg. iv, 365. Oenothera caespitosa Nutt. 



Gla 1 rous or more or less villous with spreading subscabrous hairs : leaver- 

 oblong to narrowly lanceolate 2-12 inches long attenuate to a long petiole 

 acute or acuminate, sometimes spatulate, irregularly sinuate-toothed or 

 pinnatifid or repand-denticulate : tube of the cah'x 2-7 inches long, 3-b' 

 lines wide at the throat, segments not free in the bud: petals broadly ob_ 



