268 y?:llo\v to orange 



WILD MUSTARD 



Brassica Sinapi strum. Mustard Family 



Stems: erect, hispid, with scattered stiff hairs. Leaves: oval, coarsely 

 dentate, the basal ones pinnatifid. Flowers: showy, yellow, in elongated 

 racemes. Fruit: the siliques elongated, sessile, tipped with a flattened 

 conic beak. Not indigenous. 



A handsome species bearing showy yellow flowers in ter- 

 minal racemes, and having large oval leaves that are very 

 coarsely toothed, rough to the touch, and conspicuously veined. 

 The basal leaves are lobed. Like all the Mustards, it has four 

 cruciform petals. 



GOLDEN WHITLOW-GRASS 



Draba aiirea. Mustard Family 



Stems: branching, pubescent, leafy to the inflorescence. Leaves: basal 

 ones in tufts, spatulate, obtuse, slightly dentate ; stem-leaves oblong, acute. 

 Flowers: yellow, petals twice the length of the calyx, entire. Fruit: pods 

 acute, at length slightly twisted. 



A plant that resembles a Treacle Mustard, but is much 

 smaller and has a rosulate tuft of leaves at the base. Tiny 

 single leaves also grow up on the branching stems, and the 

 little deep yellow flowers grow in close clusters. 



D. alpina, or Alpine Whitlow-grass, is a tiny species found 

 at extremely high altitudes. The leaves are all basal and grow 

 in a dense tuft, while the tiny clusters of little yellow flowers 

 are set on the top of short naked stalks. The whole plant is 

 hairy and seldom exceeds four inches in height. 



BLADDER-POD 



Physaria didyinocarpa. Mustard Family 



Stems: decumbent or ascending, slender, simple. Leaves: spatulate, 

 the basal ones obtuse, entire, narrowed into margined petioles ; stem- 

 leaves nearly sessile, acute, much smaller. Flowers: yellow, in terminal 

 racemes. Fruit : pods didymous, variable, with large, strongly inflated 

 cavities, emarginate at base and summit. 



