Barbarea.] crucifer^. 31 



In wet meadows, on ditch-banks and the muddy margins of ponds, &c., rare. 

 Fl. June — October. 0. 



E. Med. — In a moist spot by Whitefield farm but in very small quantity. In 

 considerable plenty on the half-dried-up margin of the pond at Hardingshoot 

 farm, along with Chenopodium rubrum. In the farmyard at the Grove, Adges- 

 ton. In several parts of Sandown Level but always sparingly. Close by the 

 bridge at Langbridge by Newchurch. On the swampy border of the pond at 

 Ninham by Ryde. 



Root very white and fleshy, emitting numerous long, stout, flexible, simple or 

 branched fibres. Stem 1 or many, so as often to constitute a bushy herb, from a 

 few inches to about a foot and a half high, erect or procumbent, alternately 

 branched, the branches patent, hollow, green or purplish, deeply furrowed and 

 acutely angular, somewhat wavy, smooth, glabrous and shining. Leaves nume- 

 rous, alternate, glabrous, those at the root crowded and spreading in a circular 

 caespitose tuft ; deeply lyrato-pinnatifid or pinnatisect, of from 2 to 6 pair of oblong 

 or lanceolate, opposite, subopposite or alternate, rather wavy segments that are 

 coarsely, unequally and for the most part obtusely sinuato-dentate and serrate, the 

 serratures mucronate ; diminishing in size as they descend, confluent by their 

 anterior basal margins, which are produced along the midrib into a narrow wing 

 continued downwards to the base of the leaf, forming the rather long, channelled, 

 semiterete petioles that are dilated at bottom into a pair of small, acute, cla.sping 

 auncles most evident on the superior leaves ; terminal lobe of the lower leaves 

 roundish or ovate, of the higher oblong or lanceolate, sinuately toothed and serrate 

 like the rest and often somewhat lobed : the winged margins of the petioles have 

 frequently a few scattered bristly hairs towards the base of the stalk. Flowers 

 very minute, in small axillary and terminal corymbose and leafless clusters that 

 gradually elongate and become racemose in seed. Pedicels terete, glabrous, 

 ebracteate. Calyx greenish |yellow ; se^mls oblong, concave, faintly 3-ribbed. 

 Petals not exceeding the calyx in length or shorter, pale yellow, obovate, veined, 

 attenuated into narrow claws, entire or with a shallow emargination. Stametis 

 nearly equal. Hypogynous glands 6, green, 3 close on each side of the shorter 

 pair of stamens, oblong, compressed, directed upwards ; and 1 between each com- 

 bined or longer pair, smaller. Style extremely short and thick ; stigma broad, 

 peltate, a little convex, glanduloso-pilose, faintly 2-lobed. Siliques in long, erect, 

 racemose clusters on the now spreading or partly declinate pedicels, 3 or 4 lines 

 in length, glabrous, oblong-elliptical, turgid, a little compressed horizontally, 

 mostly somewhat incurved or nearly straight, very obtuse, tipped with the style. 

 Seeds very numerous and minute, pale reddish brown, roundish ovate, compressed, 

 notched and foveate by the bent form of the cotyledons within, thickly covered 

 with vesicular prominences under a high magnifier. 



IV. Barbarea, R. Br. Winter-cress. 



" Pod 4-angied and somewhat 2-edged ; valves with a middle 

 nerve. Seeds in a single row. Calyx erect, equal at the base. 

 Glands between the shorter filaments and the germen, and a subu- 

 late one between each pair of the longer ones." — Br. Fl. 



1. B. vulgaris, K. Br. Common or Bitter Winter-cress. Yel- 

 low Rocket. French Cress. " Lower leaves lyrate, the terminal 

 lobe rounded, the superior ones obovate toothed often pinnatifid 

 at the base, stjde about as long as the ovarium distinct straight, 

 pods linear tereti-angled acuminate." — Br. Fl. p. 24. Erysimum 

 Barbarea, L. : E. B. t. 443. 



On moist hedge- and ditch-banks, by roadsides, the borders of fields, and along 

 streams, not uncommonly. Fl. May. 



