WOOTON AND STANDLEY FLORA OF NEW MEXICO. 281 



21. ERUCA Mill. 



Branched annual with pinnately lobed or pinnatilld leaves and yellowish flowers; 

 siliques linear-o1)long, long-beaked, the valves 3-nerved, concave; seeds in 2 rows in 

 in each cell. 



1. Eruca eruca (L.) Britton in Britt. & Brown, Illustr. Fl. ed. 2. 2: 192. 1913. 

 Brassica eruca L. Sp. PI. 667. 1753. 

 Eruca sativa Mill. Gard. Diet. ed. 8. no. 1. 1768. 

 Type locality: "Habitat in Helvetia." 



Range: Native of Europe, introduced into many parts of North America. 

 New Mexico: Mesilla Valley. 



22. BRASSICA L. Mustard. 



Coarse annuals, 60 to 100 cm. high or larger, with simple or pinnately lol)ed leaves 

 10 to 15 cm. long; flowers yellow, in terminal elongated racemes; siliques elongated, 

 4-angled, l^eaked; seeds in one row in the cell. 



KEY TO THE SPECIES. 



Plants glabrous; pedicels 10 to 20 cm. long 1. B. juncea. 



Plants hispid ; pedicels about 5 mm. long 2. B. arvensis. 



1. Brassica juncea (L.) Coss. Bull. Soc. Bot. France6: 609. 1859. Indian mustard. 

 Sinapis juncea L. Sp. PI. 668. 1753. 



Type locality: "Habitat in Asia." 



New Mexico: Fresnal; Gilmores Pianch; Las Cruces; Ponchuelo Creek; Santa Fe; 

 Espanola; Las Vegas; Shiprock; Agricultural College. 



Not uncommon in cultivated fields; widely introduced into North America from 

 Europe. 



2. Brassica arvensis (L.) B. S. P. Prel. Cat. N. Y. 5. 1888. Charlock. 

 Sinapis arvensis L. Sp. PI. 668. 1753. 



Brassica sinapistrum Boiss. Voy. Bot. Esp. 2: 39. 1839-45. 



Type locality: " Habitat in agris Europae." 



New Mexico: Mesilla Valley. 



Introduced into grain fields, gardens, and waste ground in many parts of the United 



States. 



23. CHEIRINIA Link. Western wallflower. 



Coarse biennials or perennials with harsh pubescence of liranched appressed hairs; 

 leaves alternate, entire or toothed, simple; flowers large for the family, 6 to 20 mm. 

 long, in long terminal racemes; sejDals ol)long, one pair saccate; petals long-clawed, 

 yellow, brownish, or maroon; siliques sub terete or more or less strongly 4-angled. 



KEY to the species. 



Flowers small, less than 1 cm. long. 



Plants tall and slender; basal leaves fugacious; plant of the 



high mountains 3 . C. inconspicua. 



Plants low and stout, with persistent basal leaves; of the 



gravelly mesas of the southern part of the State 2. C. desertorum. 



Flowers large, more than 1 cm. long. 



Petals orange, reddish brown, or purplish maroon 6. C. nheeleri. 



Petals light golden yellow. 



Basal leaves, at least, silvery white; cauline leaves very 



narrow 1 • (^- hakeri. 



