54 * MUSTARD FAMILY. 



7. CHEIRANTHUS, WALLFOWER. (Chdri is the Arabic name.) 

 Like Stocks, but slightly if at all hoary, and the flowers orange, brown-red- 

 dish, or yellow. 1|. 



C. Cheiri, Common Wallflower. Cult, from S. Eu., not hardy N., 

 a much-prized house-plant ; stem woody, crowded with the narrow and pointed 

 entire leaves. 



8. ERYSIMUM. (Name from Greek, and meaning to draw blisters, fi-om 

 the acridity.) 



E. asperum, Western Wallflower. Wild from Ohio W. & S. ; like 

 the wild state of the Wallflower, with bright yellow or orange flowers, but the 

 seeds are different, and the long pods quite square in the cross-section ; the 

 leaves somewhat toothed and hoary. Q) IJ. 



E. cheiranthoides, Treacle-Mustard or Wormseed Mustard. 

 A rather insignificant annual, wild or run wild in waste moist places, with slen- 

 der branches, lanceolate almost entii'e leaves, and small yellow flowers, followed 

 by shortish and obscurely 4-sided pods on slender spreading pedicels. 



9. BARBAREA, WINTER-CRESS. (The Herb of Santa Barbara.) 

 Different from the last genus in the seeds, divided leaves, and in the general 

 aspect. Leaves used by some as winter salad, but bitterish. @ IJ. 



B. vulgaris, Common W. or Yellow Rocket. Smooth, common in 

 old gardens and other rich soil, with green lyi'ate leaves, and bright yellow 

 flowers, in spring and summer ; pods erect, crowded in a dense raceme, much 

 thicker than their pedicels. 



B. prsecox, Early W. or Scurvy-Grass. Cult, from Penn. S. for early 

 salad, beginning to run wild, probably a variety of the last, with moi'c numeroiis 

 and narrower cUvisions to the leaves ; the less erect pods scarcely thicker than 

 their pedicels. 



10. ARABIS, ROCK-CRESS. (Name from Arabic.) El. spring and 

 summer. Leaves mostly simple and undivided. 



* Wild species, on rocks, ^c. : flowers ichite or ivliitish, not showy. (D 



A. lyrata, Low R. A delicate, low, nearly smooth plant, with a cluster 

 of lyrate root-leaves ; stem-leaves few and narrow ; bright white petals rather 

 conspicuous ; pods slender, spreading. 



A. hirsuta, Hairy R. Strictly erect, l°-2° high; stem-leaves many 

 and sagittate ; small greenish-white flowers and narrow pods erect. 



A. laevigata, Smooth R. Erect, l°-2° high, glaucous; upper leaves 

 sagittate ; flowers rather small ; pods 3' long, very narrow and not very flat,' 

 recurving ; seeds winged. 



A. Canadensis, Canadian or Sicklepod R. Tall, growing in ravines ; 

 stem-leaves pointed at both ends, pubescent ; petals whitish, narrow ; pods 3' 

 long, scythe-shaped, very flat, hanging ; seeds broadly winged. 



* * Wild, on river banks : flowers pink-purple, rather showy. ® 1). 



A. hesperidoides, Rocket R. Smooth, erect, l°-30 high; with 

 rounded or heart-shaped long-petioled root-leaves, ovate-lanceolate stem-leaves 

 (2' -6' long), the lower on a winged petiole or witii a pair of small lateral 

 lobes ; petals long-clawed ; pods sin-eading, narrow ; seeds wingless. Banks of 

 the Ohio and S. W. 



* * * Garden species : flowers white, showy. IJ. 



A. alpina, Alpine R., and its A^ariety ? A. Albida, from Eu., low and 

 tufted, hairy or soft-downy, are cult, in gardens ; fl. in early spring. 



11. CARDAMINE, BITTER-CRESS. (Ancient Greek name.) y. 



C. hirsMa, Small B. A low and brandling insignificant herb, usually 

 not hairy, witli slender fil)n)us root, jiinuate leaves, the leaflets angled or 

 tootheil, and small white flowers, followed by ntUTOw upright pods : common in 

 moist £oil, fl. spring and summer. 



