9& THE OETTCIFEB FAMILT. 



3. Hoary Draba. Draba ineana, Linn. 



(Eng. Bot. t. 388, a luxuriant garden specimen.) 

 Nearly allied to the rock D., but very different in appearance. Often only 

 a biennial, witli the radical leaves spreading, and seldom forming branched 

 tufts ; the whole plant hoary vpith short, single and stellate hairs. Stems 

 erect, 6 inches high or more, with several small, sessile, oblong or lanceo- 

 late leaves. Flowers small, and white. Pods 3 to 5 lines long, on short, 

 stiif pedicels, glabrous, or sprinkled with a few stellate hairs ; the valves 

 flat, or the whole pod shghtly twisted. 



In rocky situations, in northern and Arctic Europe and Asia, far more 

 common than the rocTc D., and descending to lower elevations. Not \m- 

 frequent in the Scotch Highlands, and extendmg into northern England, 

 north Wales, and northern Ireland. Fl. summer. 



4. Vt^all Draba. Draba muralis, Linn. 



(Eng. Bot. t. 912.) 



A slender, erect, but weak annual, from a few inches to a foot high, 

 simple or shghtly branched, green, but rough with short hairs. Radical 

 leaves spreading, ovate or oblong, toothed, J to 1 incli long. Stem-leaves 

 smaller, ovate, clasping the stem by their cordate or auricled base. Petals 

 white, entire, and very minute. Pods about 2 lines long, on spreading 

 pedicels, in a long, slender raceme, each containing about 6 seeds. 



On rocks and walls, in Umestone hilly districts, in the greater part of 

 Europe and Russian Asia, from the Mediterranean to Scandinavia, and 

 said to extend to the Arctic Circle. In Britain, sparingly scattered over 

 several parts of England and southern Scotland. Fl. spring. 



5. Common Draba. Draba verna, Linn. 

 (Eng. Bot. t. 586. Whitloiv-grass.) 



A dwarf annual, lasting but a few weeks, the leaves all radical, ovate or 

 oblong, seldom alDove half an inch long, and closely spreading on the 

 ground. Peduncles slender, erect and leafless, 1 to 3 or rarely 4 inches 

 high. Petals small, white, and deeply cleft. Pods on rather long slender 

 pedicels, about 3 hnes long, containing numerous minute seeds, on stalks of 

 very unequal length. 



On walls, rocks, dry banks, and stony places, throughout Europe and 

 western Asia, except the extreme north. Abundant in Britain. Fl. early 

 spring. Distinguished by some as a genus, under the name of Erophila. 



XVI. CAMEIiINA. CAMELINA. 



Erect and more or less hispid annuals, with sagittate or auricled stem- 

 leaves, and small yeUow flowers. Pod obovoid, the partition broad, the 

 valves very convex, with the midrib distinct, the edges flattened, forming a 

 narrow margin round the pod. -Style slender. Seeds several. The radicle 

 incumbent on the back of the cotyledons. 



A genus consisting of two or three Eiu-opean and north Asiatic species, 

 perhaps all reducible to a single one, separated from Cochlearia on account 

 of their yellow flowers and incumbent cotyledons. 



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