ii6 A GUIDE TO THE WILD FLOWERS 



332. Wall-pepper. Scdum acre. (Crasstdaccae.) A low 

 prostrate smooth perennial growing in dense mats, from 

 which the flowering branches rise 1-2 in. high. Leaves 

 scarcely }^ in. long, densely crowded along the sides of the 

 stems and surrounding them. Flowers in small clusters at the 

 top of the flowering branches, yellow, about Ys in. across. 

 In rocky places and in fields, mostly as an escape from cul- 

 tivation. Nova Scotia to Ontario and Virginia. July. Re- 

 lated plants, but with a diflFerent aspect are Nos. 317 and 



318. 



333. Prickly Poppy. Argcmone mcxicana. (Papaveraccac.) 

 A usually spiny herb 10-18 in. high with thistle-like foliage, 

 and yellow juice. Leaves clasping the stem by the narrowed 

 base, 3-8 in. long, almost a third as wide, rather deeply cut, 

 and the margins spiny, bluish-green and white dotted. 

 Flowers solitary, almost stalkless, 1-2 in. across, pale yellow. 

 Fruit a prickly pod about i in. long. August. Waste places, 

 often on shingle beaches. Mass. to Florida. Native of tropical 

 America. Fig. 333. See Nos. 404 and 500. 



334. Frostweed. Crocanthcmnni canadense. {Hclianthemimi 

 canadense.) (Cistaccae.) Erect or sprawling herb, almost 

 woody at the base, with alternate toothless leaves, and yellow 

 usually solitary flowers. Leaves essentially stalkless, narrowed 

 both ends, 3^-i><i in. long, and a third as wide, rough and 

 dark green above, paler beneath. Flowers of two kinds : some 



