OF THE WASATCH REGION 37 



1. E. nsnerum DC. (Cheiranthus asper Nutt.) "Western Wall 

 Flower. Stems usually unbranched, 1-1% ft. high; rough- 

 pubescent with 3-forked hairs. Leaves narrowly lanceolate 

 or elliptical; entire or rather remotely dentate. Flowers 

 lemon-yellow. Siliques ascending or widely spreading; 2-3 

 inches long. Hillsides. April-June. 



2. E. chelranthoirtes L. (C. cheiranthoides (L.) Heller.) 

 Worm-seed or Treacle Mustard. Erect, minutely rough - 

 pubescent, much -branched; %-2 ft. high. Leaves lanceolate or 

 elliptical; entire or slightly toothed; sessile or tapering into 

 a short petiole. Flowers rather small. Calyx yellowish; cor- 

 olla lemon-yellow, mixed with white below. Silique nearly 

 erect, less than an inch long when mature; on ascending 

 pedicels about % inch long. In dry soil in waste places. April- 

 June. 



15. CONRINGIA. Hare's Ear Mustard. 



Glabrous annuals with sessile and entire stem-clasping 

 leaves and long, 4-angled siliques. Seeds cblong, in 1 row in 

 each cell. 



1. C. oricntnlis (L.) Dumort. (C. perfoliata Link.) Stem 

 usually erect; 1-3 ft. high. Leaves light-green; elliptical, with 

 obtuse apex. Introduced. In waste places. May-June. 



16. BRASSICA. Mustard. 



Annual, biennial or perennial herbs. Stem erect and 

 branching. Basal leaves pinnately-lobed; stem-leaves dentate 

 or entire. Inflorescence racemose. Flowers showy; bright- 

 yellow. Siliques sessile; terete or 4-angled; tipped with a 

 mostly 1-seeded beak. Seeds globose, without margins; in 1 

 row in each cell. 



None of the leaves clasping at base. 



Pods not appressed; their beaks flat or angled, 



1-seeded 1. B. arvensls 



Pods appressed: their beaks conical, empty 2. B. nigra 



Upper leaves clasping at base . . . . . 3. B. campestris 



1. B. arvensis (L.) Kuntze. (B. Sinapistrum Boiss.) Wild 

 Field Mustard. Stem erect, 1-2 ft. high; hispid with scattered 

 hairs. Pedicels stout. Pod smooth or sometimes bristly; some- 

 what constricted between the seeds; its beak large and flat or 

 conspicuously angled. Fields and waste places. June-Sept. 



2. B. nlgra (L.) Koch. Black Mustard. Stem erect, 2-7 ft. 

 high, hirsute with scattered hairs. Leaves on slender petioles 

 or the upper sessile. Flowers fragrant. Pods short; on short, 

 erect pedicels. Seeds dark -brown. Roadsides and waste places. 

 April -November. 



3. B. cainpegfri.s L. Turnip; Ruta-Baga. Glaucous; light- 

 green; biennial from a thickened root. Stem-leaves lyrately- 

 lobed below; upper entire and cordate or auriculately-clasping. 

 Flowers lemon-yellow. In waste places, escaping from culti- 

 vation. April-November. With it will probably be found B. 

 Napus L. (Rape). 



