49 _ THE CRUCIFER FAMILY, — [Draba. 
4, D.muralis, Linn. (fig. 91). Wall Draba.—A slender, erect, but 
weak annual, from a few inches to a foot high, simple or slightly branched, 
green, but rough with short hairs. Radical leaves spreading, ovate or 
oblong, toothed, 3 to 1 inch 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 limestone hilly districts, in the greater part of 
Europe and Russian Asia, from the Mediterranean to Scandinavia, and 
said to extend to the Arctic Circle, reappearing in Tasmania. In Britain, 
sparingly scattered over several parts of England and southern Scotland. 
Fl. spring. 
5, D.verna, Linn. (fig. 92). Common Draba, Whitlow-grass.—A 
dwarf annual, lasting but a few weeks, the leaves all radical, ovate or 
oblong, seldom above 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 lines long, containing numerous minute seeds, on stalks of very unequal 
length. Hrophila vulgaris, DC. 
On walls, rocks, dry banks, and stony places, throughout Europe and 
western Asia, except the extreme north. Abundant in Britain. //. early 
spring. Distinguished by some as a genus, under the name of Hrophila. 
A variety with remarkably inflated capsules (2. inflata, Wats.) occurs on 
Ben Lawers. 
XV. CAMELINA. CAMELINA. 
Erect and more or less hispid annuals, with sagittate or auricled stem- 
leaves, and small yellow 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 one of the cotyledons. 
A genus consisting of two or three European and North Asiatic species, 
perhaps all reducible to a single one, separated from Cochlearia on account 
of their yellow flowers and incumbent cotyledons. 
1, ©. sativa, Crantz (fig. 93). Common Cameline, Gold of Pleasure.— 
Stem simple, or slightly branched, 1 to 2 feet high. Lowest leaves stalked, 
upper ones sessile, clasping the stem with pointed auricles, lanceolate, en- 
tire, or toothed, 1 to 2 inches long. Pods about 3 lines long, on pedicels 
about twice that length, in a long, loose raceme. C. faetida, Bab. 
In cultivated and waste places, in central and southern Europe, and the 
temperate parts of Russian Asia; further north only as a weed of cultiva- 
tion. In Britain, appearing occasionally in corn and flax fields in England 
and Ireland. Fl. with the corn. 
XVI. SUBULARIA. AWLWORT. 
A dwarf aquatic annual, with the pod of a Draba, but the valves more 
convex, and the radicle incumbent on the back of the cotyledons, which are 
linear, and the bend is, as in Senebiera, above the base of the cotyledons, 
not at their junction with the radicle, as in the rest of Crucifers. 
The genus is limited to a single species. 
