CHYLisMA. ONAGRACE^. 233 



PACHYLOPHUS. 



S. andinum Walp 1. c. 7P. CEnothera andina Nutt. Oanescently 

 pubescent throughout : stems slender, 1-3 inches high, becoming diflfiusely 

 branched: leaves linear-spatulate C-12 lines long, attenuate into a slend,er 

 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 Nutt. Baimann, Engl. & Prantl, Nat. Pfl. Fam. iii, 217y/ 



Caulescent annuals with pinnMeor simple ■ leaves and yellow 

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

 the limb 4-parted. Petals 4, en-tire. Stamens 8, unequal; anthers 

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

 sule linear, subcylindrical or subclavate, obtuse, membranaceous, 

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



C. scapoidea Small 1 c. 193. Oenothera scapoidea Nutt. Puberulent 

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

 near the base: leaves mostly subradica!, long-petioled, lyrately pinnatifid, 

 or soiietimes undivided, the terminal segment much the longest, ovate 

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

 prominent veins often dark colored, the lateral leaflets few to mp,ny 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 : 

 causiile 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. CEnothera crucifi'imis K' II- Gi, scpoidea Var. pur- 

 purascens Watson. Stems erect, 6-18 inches high, stoutisli 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, 

 U-S lines long ; the bud abruptly acuminate, petals white or pinkish,, rarely., 

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

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

 Oregon tO'Nevada and Southern California. 



10 PACHYLOPHUS Spach. Hist. Veg.iv", 305. 



Acaulsscent or very short caulescent perennials with entire or 

 pinnatifid leaves and large w hite or rose-color fiowers that open 

 only at night or in cloudy weather. Ctilyx-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. T^uttallia Spach. Hist. Veg. iv, 365. (Enothera csespitosa NuLt. 

 Gla I rous or more or less villous with spreading subscabrous hairs: leaves 

 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 calyx 2-7 inches long, 3-6 

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



