Hutchinsia.} | VI. CRUCIFERA. 45 
XX. HUTCHINSIA. HUTCHINSIA. 
Dwarf annuais or perennials, with pinnate leaves and white flowers, 
separated from Lepidium by having 2 seeds in each cell of the pod. 
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 some 
perennials from the high mountains of central and southern Europe. 
1. H. petreea, Br. (fig. 101). Rock H.—A glabrous, delicate, 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. Radicle 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 limestone tracts of the west of England, Dumfries, and Wales, the 
walls of Eltham churchyard and of a cemetery at Corkin Ireland. J. 
spring. 
XXI, CAPSELLA. CAPSELL. 
Annuals, with entire or pinnate leaves and small white or purplish 
flowers, distinguished from Lepidium and Hutchinsia by having several 
seeds in each cell of the pod, from 7’hlaspi 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. 102). Shepherd’s-purse.—Root 
tapering, often to a great depth. Radical 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 base narrowed, sometimes notched at the 
top and almost obcordate. Seeds 10 to 12 in each cell. 
Probably of Huropean 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. Abundantin Britain. FU. 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 expanded into a narrow wing at the top. Seeds one in each 
cell, the radicle usually incumbent on the back of the cotyledons. 
A numerous and rather natural widely diffused genus. It is readily 
distinguished from Jberis by the small petals all equal, and from all 
other British siliculose Crucifers, with laterally compressed pods, 
except Senebiera, by the single seeds in each cell. 
