CRUCIFER^F. (.MUSTARD FAMILY.) 21 



6. CAULANTHUS, Watson. 



Sepals large, nearly equally saccate at base. Anthers linear, curved. — 

 Ours are stout perennials, with lyrate and entire leaves and greenish-yellow 

 flowers. 



1. C. hastatUS, Watson. Glabrous, simple or somewhat branched: 

 leaves petioled, very variable; radical ones lyrate or entire, the terminal 

 leaflet ovate, hastate, or truncate at base, the lateral leaflets very small ; cauline 

 ovate-oblong, entire, hastate, rounded or cuneate at base : flowers in a loose 

 virgate raceme, reflexed : sepals narrow, distant: petals Jsometimes nearly 

 wanting) equalling the sepals, toothed on the sides : pods spreading. — Bot. 

 King's Exp. 28, with plate. On shaded slopes in the Wasatch and Uinta 

 Mountains. 



7. THELYPODIUM, Endl. 



Sepals narrow, equal at base. Anthers linear, curved. — Mostly stout and 

 coarse biennials. 



* Leaves entire. 



1. T. integrifolium, Endl. Stem 3 to 5 feet high, attenuated upward 

 and sending out numerous branches toward the summit: radical leaves petioled, 

 oblong-elliptical ; cauline lanceolate, sessile, uppermost nearly linear : flowers 

 crowded, pale rose-color: pedicels almost horizontal: pod short, abruptly 

 pointed, on a short stipe. — From New Mexico to the Upper Missouri and 

 Oregon; also in California. 



2. T. linearifolium, Watson. Stem 1 foot or more high, often branched 

 from the base, erect, paniculate at the top: leaves linear, or the lower lance- 

 olate, sessile : sepals turning purplish : petals rose-purple : pods erect, on 

 spreading pedicels, very slender, teretish, apiculate icith a very short style. — 

 Bot. King's Exp. 25. Streptanthus linear if olius, Gray. Wyoming, Colorado, 

 and southward. 



3. T. sagittatum, Endl. Stems weak, rarely erect, 12 to 18 inches high: 

 radical leaves long-petioled, lanceolate; cauline sagittate and clasping: sepals 

 purplish: petals pale pink: pods somewhat torulose, acuminate with the 

 rather long style, spreading. — W. Wyoming, S. W. Montana, to Utah and 

 Nevada. 



4. T. Nuttallii, Watson. Besembling the last but stouter and more erect, 

 3 to 5 feel high: radical leaves ovate: sepals and petals bright purple, rarely 

 whitish — Bot. King's Exp. 26. Streptanthus sagittatus, Nutt. Wyoming 

 and Montana to Oregon and California. 



* * At least the radical leaves toothed. 



5. T. Wrightii, Gray. Stem 2 to 3 feet high : leaves lanceolate, repand- 

 dentate or denticulate, all narrowed into a short petiole : flowering racemes 

 short and dense; pedicels divaricate: petals scarcely exceeding the sepals- 

 pods widely spreading, on a very short stipe. — Colorado and southward. 



