Leyrdium. | ‘VI. CRUCIFERA, 47 
1 Europe, and temperate Russian Asia. Rare in Britain, and only as an in- 
troduced weed in a few English counties. £1. spring or early summer. 
4, L. latifolium, Linn. (fig. 105). Broad-leaved Cress, Dittander.— 
A stout, erect perennial, attaining 2 feet or even more in height, of a pale 
green, but glabrous. Stems much branched in the upper part, but forming 
a large loose panicle, not a flat corymb as in LZ. Draba. Radical leaves 
large, ovate, toothed, on long stalks; stem-leaves oblong or broadly lan- 
ceolate, 2 or 3 inches long, the lower ones stalked and mostly toothed, the 
upper 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 Russian Asia, extending northwards to 
Sweden. In Britain, apparently indigenous near the coasts of some of the 
eastern counties of England, and near Cork in Ireland, apparently occa- 
sionally also in some other localities. £7. summer. 
5, L.ruderale, Linn. (fig.106). Narrow-leaved Cress.—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 very slightly winged at the top; the style very 
minute. | 
In dry gravelly soils, waste places, on rubbish and old walls, chiefly near 
the sea, nearly all over Europe to western India, and Russian Asia, except 
the extreme north, abundant also in extratropical Australia. In Britain, 
along the coast of England, from Bristol round to Norfolk, but scarcely 
wild inland, or in Scotland. 7. 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 Lepidiwm. 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 on the back of one of the cotyledons, but 
the bend is, as in Subularia, a little above the base of the cotyledons them- 
selves, 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 nearlyso . . 1. S. Coronopus. 
Pods 1 line broad, slightly wrinkled, on slender pedicels ‘é . 2. 8. didyma. 
1, S. Coronopus, Poir (fig. 107). Common Senebiera, Swine-cress, 
Wartcress.—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 to 1 or 2 inches. Pedicels seldom a line long. 
Pod about 2 lines broad and not quite so long, scarcely notched at the top, 
