Lepidium. VI. CRUCIFER. 47 
sessile, but tapering at the base, and often entire. Pods about 1 line 
long and broad, the valves scarcely keeled and not winged, the style 
almost imperceptible. 
In waste places, especially near the sea, widely distributed over 
central and southern Europe and temperate Asia, extending north- 
wards to Sweden. In Britain indigenous on the coasts of England 
from Wales to Norfolk, and near Cork in Ireland, introduced in other 
localities. Fl. summer. 
5. L. ruderale, Linn. (fig. 107). Narrow-leaved C_—A glabrous 
annual, 6 inches to a foot high, with very much branched wiry stems. 
The radical and lower leaves pinnatifid, with narrow lobes; the upper 
ones entire or nearly so, and linear. Flowers very minute, generally 
without petals, and only 2 stamens. Pods small, nearly orbicular ; 
the valves keeled or sometimes slightly winged at the top; the style 
minute. 
In dry gravelly soils, waste places, on rubbish and old walls, chiefly 
near the sea, nearly all over, Hurope and northern Asia, except the 
extreme north. In Britain along the coast of England, but scarcely 
wild inland, or in Scotland. J. early summer, and often on till autumn. 
XXIII. SENEBIERA. SENEBIERA. 
Prostrate annuals, with pinnate leaves, and short racemes of small 
white flowers opposite the leaves. Petals and stamens as in Lepidium. 
Pod laterally compressed (at right angles to the narrow partition), 
orbicular or broader than long, either indehiscent or separating into 
two nuts, each with a single seed. Radicle incumbent, but the bend 
is, as in Subularia, a little above the base of the cotyledons, not at their 
junction with the radicle. 
A genus of very few species, but widely diffused over nearly the 
whole range of the Order. 
Pods 2 lines broad, deeply wrinkled, sessile, or nearly so : . 1. S. Coronopus. 
Pods 1 line broad, slightly wrinkled, on slender pedicels ‘ . 2. S. didyma. 
1. S. Coronopus, Poir (fig. 108). Swine-cress, Warteress.—A pale 
green, glabrous or glaucous annual, the stems, when first flowering, 
forming a short, close tuft, afterwards spreading along the ground to ™ 
the length of 6 inches or more. Leaves once or twice pinnately 
divided, the segments not numerous, linear, or wedge-shaped, entire 
or toothed. Racemes at first forming close sessile heads, but, as the 
fruit ripens, lengthening out tol or 2inches. Pedicels seldom a line 
long. Pod about 2 lines broad and not quite so long, scarcely notched 
at the top, marked with deep wrinkles, which form a kind of crest 
round the edge; it usually remains entire when ripe. Coronopus 
procumbens, Gilib. 
In cultivated and waste places, in central and southern Europe to 
the Caucasus, extending into Sweden. Rather plentiful in southern 
England, decreasing northwards, and local in Scotland and Ireland. 
Fl. summer and autumn. : 
2. S. didyma, Pers. (fig. 109). Lesser Si—Much like S. Coronopus 
in habit and foliage, but generally more slender, often sprinkled with 
a few hairs; the leaves rather smaller and more divided ; the flowers 
