CRUClFERyE 281 



rosulate or arranged along the stem, composed of small, 

 oblong, entire leaflets; stems slender, bearing tiny, pure 

 white flowers on erect and crowded spikes. June-July. 

 Cool rocks in the limestone Alps and Jura, between 1000 

 and 2700 m. 



Culture : cool rockery, with partial shade, if possible. 

 It is altogether a delightful little carpeter, but spreads 

 dreadfully, when established, from seed. 



Thlaspi 



"Eng. : Bastard Cress ; Fr. ; Tabouret ; Ger. : Taschelkraut, 



T. rotundifolium (PI. XI V). A neat, little creeping plant, 

 sufficiently meritorious for exhaustive collections, with 

 smooth, fleshy leaves, rounded ovals in shape and gathered 

 into rosettes. The flowers are reddish-violet, sweet scent- 

 ed, growing in dense, flattened racemes. June-August. 

 Limestone Alps. Requires full sun and a crevice in a wall 

 or chalk rock. Easily grown from seed. 



Biscutclla 



"Eng. : Buckler Mustard ; Fr. : Biscutelle ; Ger. : Brillenkraut. 



B. Ixvigata: a plant with rough leaves, the edges 

 coarsely dentate, which insensibly narrow on the leaf- 

 stalk; flowers numerous, small, clear-yellow, in a spreading 

 raceme on the apex of a slender, brittle stem; the fruit is 

 very suggestive of a pair of lunettes with a peak between 

 the two halves. July-September. Rocky pastures of the 

 Alps (1000-2000 m.). 



A plant of some claims, but very seldom seen in gar- 

 dens. It requires light deep soil, full sun, in rockery or 

 open beds. Propagate by seeds. 



