42 THE CRUCIFER FAMILY. 
very minute. Pods about 2 lines long, on spreading pedicels, in along, 
slender raceme, each containing about 6 seeds. 
On rocks and walls, in limestone hilly districts, in Europe and northern 
Asia, from the Mediterranean to Scandinavia. In Britain sparingly 
scattered over several parts of England, and introduced into Scotland 
and Ireland. fl. spring. . 
5. D. verna, Linn. (fig. 93). Whitlow grass.—A dwartf 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 
siender, erect, 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. 
Erophila vulgaris, D.C. 
On walls, rocks, dry banks, and stony places, throughout Europe and 
western Asia, except the extreme north. Abundant in Britain. FV. ear ly 
spring. Distinguished by some as a genus, under the name of Hrophila. 
An alpine variety with remarkably inflated ovoid-oblong pods (£. inflata, 
Wats.) occurs on Ben Lawers and Glen Shee in Scotland. [There are 
three well marked British forms or species: 1. The above-mentioned 
inflata ; 2. E. brachycarpa, with orbicular-oblong fewer-seeded pods, as 
long as broad ; 3. £. vulgaris proper, with obovate-oblong pods, twice as 
long as broad. ] 
XV, CAMELINA. CAMELINA. 
Krect 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, form- 
ing a narrow margin round the pod. Style slender. Seeds several. 
The radicle incumbent on the back of one of the cotyledons. 
A genus of two or three European and north Asiatic species, perhaps 
reducible to one, separated from Cochlearia by their yellow flowers and 
incumbent radicle. 3 
1. C. sativa, Crantz (fig. 94). Gold of Pleaswre.—Stem simple, or 
slightly branched, 1 to 2 feet high. Lowest leaves stalked, upper ones 
sessile, clasping the stem with pointed auricles, lanceolate, entire, or 
toothed, 1 to 2 inches long. Pods about 3 lines long, on pedicels about 
twice that length, in along loose raceme. C. fetida, Bab. 
In cultivated and waste places, in central and southern Europe, and 
temperate Asia ; further north only as a weed of cultivation. In Britain 
it occurs in 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 cotyle- 
dons, not at their junction with the radicle, as in the rest of Crucifers. 
The genus is limited to a single species. 
1. S. aquatica, Linn, (fig. 95). Awlwort.—The whole plant is but 1 
to 2, rarely 3 inches high, fa perfectly glabrous, usually growing 
entirely under water. Leaves all radical, nearly cylindrical, slender — 
