CEUCIFEE^E. (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 cuueate at base : flowers in a loose 

 virgate raceme, reflexed : sepals narrow, distant: petals (sometimes nearly 

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

 King's Exp. 28, with plate. On shaded slopes in the Wahsatch 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 with 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. Resembling the last but stouter and more erect, 

 3 to 5 feet 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, f epand- 

 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. 



