CRUCJFEE.IO. 



7] 



Annuals. Pedicels slender, spreading. 



Stem dwarf, erect, leafless. Petals deeply divided . . 5. Common I). 

 Stem weak, ascending, leafy. Petals entire 4. Wall D. 



1. Yellow Draba. Draba aizoides, Linn. (Fig. 87.) 

 (Eng. Bot. t. 1271.) 



Stock perennial and branched, cover- 

 ed with closely-packed leaves, forming 

 dense tufts of 2 or 3 inches in diameter. 

 The leaves 3 or 4 lines long, sessile, 

 linear, of a bright green, edged with 

 stiff white hairs. Peduncles leafless, 1 

 to 4 or even 5 inches high, bearing a few 

 rather large yellow flowers. Pods about 

 4 lines long, glabrous or slightly hairy, 

 with a rather long style ; the valves more convex than in the rest of the 

 genus. " 



In clefts of rocks, and stony places, in the mountain districts of cen- 

 tral and southern Europe. Long cultivated in our rock-gardens, it 

 has established itself in considerable abundance on rocks and old walls 

 about Pennard Castle, near Swansea. Fl. .spring. 



Fig. 87. 



2. Hock Draba. Draba hirta, Linn. (Fig. 88.) 

 (Eng. Bot. t. 1338. D. rupestris, Brit. Fl.) 



Stock shortly tufted and perennial, 

 but not of long duration. Leaves crowd- 

 ed, 3 to 5 or 6 lines long, narrow-oblong 

 or lanceolate, entire or slightly toothed, 

 with a few stiff, simple or stellate hairs. 

 Peduncles usually 1 or 2 inches, and 

 leafless ; in luxuriant specimens twice as 

 long, with one or two small ovate leaves. 

 Flowers few and small, but larger than 

 in the hoary D. Pods 2 to 3 lines long, 

 on short stiff pedicels, usually slightly 

 hoary with a few very minute hairs. 



In the mountains of the northern or Arctic regions of Europe, Asia, 

 and North America. Hare on some of the higher mountain summits 

 of Scotland. Fl. July. The specimens with slightly hoary pods (as 

 are the Scotch ones) are by some distinguished, under the name of D. 

 rupestris, from the original D. hirta of Linnseus (not found in Britain), 

 in which they are almost or quite glabrous. 



Fig. 88. 



