MUSTARD FAMILY. Cruciferae. 



The fragrant flowers, each about three-quarters of an inch 

 across, form a handsome cluster, about three inches across. 

 The calyx is yellow, the pistil green, and the anthers brown. 

 The conspicuous, four-sided pods are spreading or erect, 

 from one to five inches long, with a stout beak. In the 

 high mountains the orange-color gives way to the variety 

 perenne, with lemon-colored flowers, perhaps commoner 

 than the orange, not so tall, and wonderfully handsome in 

 the Wasatch Mountains, around Mt. Rainier and similar 

 places, and widely distributed. The Cream-colored Wall- 

 flower, E. capitdtum, blooms early, growing near the coast; 

 the flowers large, handsome, but not sweet-scented. 



There are a good many kinds of Thlaspi, of temperate 

 and arctic regions: smooth low plants, mostly mountain; 

 root-leaves forming a rosette; stem-leaves more or less 

 arrow-shaped and clasping; flowers rather small, white or 

 purplish; sepals blunt; style slender, sometimes none, with 

 a small stigma; pod flat, roundish, wedge-shaped, or heart- 

 shaped, with crests or wings. 



A rather pretty little plant, with several 

 Wild Candytuft, flower . sta i ks springing from rosettes of 

 Pennycress 



Thldspi glaucum leaves, dull-green, somewhat purplish 

 White and thickish, smooth and obscurely 



Spring, summer, toothed, all more or less covered with a 



autumn "bloom"; the flowers small, slightly 



Northwest and ' . 



utah fragrant, forming clusters less than an inch 



across, the white petals longer than the 

 thin, greenish sepals. This grows on moist, mountain 

 slopes. T. alpestre, of the Northwest, is similar, but with- 

 out "bloom." 



There are only a few kinds of Dithyrea, grayish, hairy 

 plants, resembling Biscutella of the Mediterranean, with 

 yellowish or whitish flowers. 



. , A little desert plant, from six to twelve 



Dithyrea Wishzem . 



White inches tall, with branching stems; pale, 



Summer yellowish-green, downy leaves, about an 



Ariz., New Mex., inch long, with wavy or toothed margins; 

 Tex.,Okla.,Ark. smaU white fl owers an d funny little seed- 

 pods, sticking out at right-angles from the stem. This 

 grows at an altitude of three to four thousand feet and is 

 found in the Petrified Forest. 



There are many kinds of Streptanthus, difficult to dis- 



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