— Tberis.] . VI. CRUCIFER. 45 
Common as a weed of cultivation in western, central, and southern 
Europe. Appears occasionally in cornfields in England and Scotland, 
especially in limestone districts. 27. with the corn. 
XX. HUTCHINSIA. HUTCHINSIA. 
Dwarf annuals or perennials, with pinnate leaves and white flowers, 
separated from Lepidium as having two seeds in each cell of the pod instead 
of one. 
A genus limited by some to one species, by others extended to a few 
allied ones from southern Europe and Russian Asia, or also to two or 
three perennials from the high mountain-ranges of central and southern 
Europe. 
1, H. petreea, Br. (fig. 100.) Rock Hutchinsia. A glabrous, deli- 
cate, erect annual, seldom 3 inches high, branching at the base, Radical 
leaves about half an inch long, and pinnate ; stem-leaves few and smaller, 
with fewer and narrower segments. Flowers very minute. Pod oval, 
rather more than a line long. MRadicle of the seeds incumbent on the back 
of one of the cotyledons, but very near its edge. 
On limestone rocks, old walls, and stony places, in central and southern 
Europe, from Sweden to the Crimea. Confined, in Britain, to the lime- 
stone tracts of the west and north of England, south-west Scotland and 
Wales, the walls of Eltham churchyard and of a cemetery at Cork in Ireland. 
Fl, spring. 
Se 
XXI. CAPSELLA. CAPSELL. 
Annuals, with entire or pinnate leaves and small white flowers, distin- 
guished from Lepidium and Hutchinsia by having several seeds in each cell 
of the pod, from Thlaspi by the pod not winged, and the radicle incumbent 
on the back of one of the cotyledons. 
A genus of a single one, or of two or three, European and Asiatic species, 
according to the limits assigned to it by different botanists. 
1, ©. Bursa-pastoris, Moench. (fig. 101). Shepherd’s-purse.—Roct 
_ tapering, often to a great depth. MRadical leaves spread on the ground, 
pinnatifid, with a larger ovate or triangular terminal lobe, or sometimes 
entire. Stem erect, from a few inches to above a foot high, rather rough 
and often hairy, with a few oblong or lanceolate, entire or toothed leaves, 
clasping the stem with projecting auricles. Pods in a long loose raceme, 
usually triangular, truncate at the top, with the angles slightly rounded, 
and narrowed at the base, sometimes notched at the top and almost obcor- 
date. Seeds 10 to 12 in each cell. 
Probably of European or west Asiatic origin, but now one of the com- 
monest weeds in cultivated and waste places, nearly all over the globe 
without the tropics. Abundant in Britain. #7. nearly all the year round, 
—_ 
XXII. LEPIDIUM. CRESS. 
Annuals or perennials, glabrous or hairy, with numerous small white 
flowers. Petals equal. Stamens without appendages. Pods ovate or shortly 
oblong, rarely orbicular, compressed laterally (at right angles to the narrow 
partition); the valves boat-shaped, either without wings or the keel ex- 
