28 VIOLACE.E. (VIOLET FAMILY.) 



1. C. lutea, Hook. Smooth or slightly pubescent, 1 to 2 feet high: 

 leaflets 5, linear- to oblong-lanceolate : flowers showy, bright yellow, corymbose, 

 the raceme elongated in fruit : stamens much exserted : pod equalling or 

 much longer than the stipe. — C. aurea, Nutt. Abundant in the valleys of 

 Colorado and Wyoming, and westward to Nevada and Oregon. 



2. C. integrifolia, Torr. & Gray. Somewhat glaucous, 2 to 3 feet high : 

 leaflets 3, lanceolate (the lowest oblong) : flowers large, showy, reddish-purple, 

 rarely white, the raceme sometimes nearly a foot long: pods compressed, 

 much longer than the stipe. — From Colorado to the Upper Missouri and 

 eastward. 



3. C. SonorSB, Gray. Glabrous: leaflets 3, linear: flowers purplish: pod 

 turgid, somewhat longer than the stipe, which is much shorter than the pedicel. — 

 PI. Wright, ii. 16. S. Colorado (Brandegee) and southward. 



3. CLEOMELLA, DC. 



Like Cleome, but the pod few-seeded, small and ovoid-globose or rhom- 

 boidal. — Erect branching annuals, with yellow racemose flowers and 3-folio- 

 late leaves. 



1. C. angustif'olia, Torr. Branching above: leaflets oblong-linear: pod 

 many times longer than the style, shorter than the stipe, dilated-rhomboid : 

 seeds transverse/?/ rugulose. — Colorado and southward. Distributed in the 

 earlier Colorado collections by mistake under the name of C. tenuifolia. 



2. C. obcarpa, Gray. Diffuse: leaflets oblong-linear : raceme frequently 

 densely flowered : pod with a somewhat shorter style, much shorter than the 

 stipe, ovate : seeds 1 or 2, smooth. — 1'roc. Am. Acad. xi. 72. On the borders "t 

 the Mesa "Verde, S. W. Colorado ; also in Nevada. 



Order 8. VIOLACE.2E. (Violet Family.) 



Herbs, distinguished by the irregular one-spurred corolla of 5 petals, 

 5 stamens, adnate introrse anthers conniving over the pistil, which has 

 a single club-shaped style, a one-celled ovary with 3 parietal plaeentfe. 

 — Flowers perfect, with persistent sepals. Each of the 3 valves of the 

 capsule, after dehiscence, in drying firmly folds together lengthwise and 

 by its increasing pressure projects the obovate seeds. 



1. Viola. Sepals auricled. Lower petal spurred at base. 



2. Ionidiuin. Sepals not auricled. Lower petal unguiculate, the claw dilated and 



shortly gibbous or concave. 



1. VIOLA, L. Violet. 



Anthers often coherent, the connectives of the two lower bearing spurs 

 which project into the spur of the petal. — Mostly perennial herbs with alter- 

 nate leaves, foliaceous persistent stipules, and 1-flowered axillary peduncles. 

 The later flowers are often cleistogamous. 



