vi. cruciferte: arabide.e. 
25 
A'rctbis.'] 
shorter than the transverse diameter of the oblong-ovate or 
cordate terminal lobe. B. stricta Andr. 
Pastures and hedges, frequent. If.. 5 — 8. — Stem 1 — 2 feet high, 
stout, furrowed, branched, glabrous Petals yellow, usually the 
length of the calyx, or in what is called P. arcuata, twice as long. 
Style conspicuous. 
2. B. *prce'cox Br. {early IF.); lower leaves lyrate or pinnate, 
upper ones pinnatifid, segments linear oblong entire, pods linear 
compressed obtuse scarcely thicker than the pedicel. Erysi- 
mum E.B. t. 1129. 
Waste places in Devonshire and elsewhere. $. 4 — 10. — About 
1 — 2 feet high; more slender than the last in every part; flowers 
smaller ; pods longer. Style very short. 
4. Turritis Linn. Tower-Mustard. 
Pod elongated, compressed, 2-edged; values nerved or keeled. 
Seeds in a double row. Calyx • nearly equal at the base. — 
Named from turris, a tower; the leaves becoming gradually 
smaller upwards, so that the plant assumes a pyramidal form. 
1. T. glabra L. ( long-podded T .) ; radical leaves toothed 
hairy, cauline ones amplexicaul entire glabrous. E. B. t. 777. 
Banks and road-sides in many parts of England, but not general; 
apparently most frequent in Norfolk and Suffolk. Bowling Bay, 
Partick, and Redgorton (Perthshire), in Scotland. 0. 5 — 7. — 
Stem 1 — 2j feet high. Leaves oblong-lanceolate, glaucous, radical 
ones toothed or sinuate at the base, cauline ones sagittate. Flowers 
yellowish-white. Pods long, erect. In this genus there are no glands 
between the larger stamens. 
5. A'rabis Linn. Rock->Cress. 
Pod linear, compressed, crowned with the nearly sessile 
stigma ; valves nerved or coarsely veined. Seeds in one row. 
Calyx erect. — Name from apathy, applied by Dioscorides to 
Lepidium Draba. 
1. A. stricta Huds. ( Bristol /?.) ; leaves toothed obtuse hispid, 
radical ones sinuate toothed, cauline leaves sessile, stems hairy 
at the base, petals cuneate-linear erect, pods erect, their valves 
1 -nerved. E. B. t. 614. 
Rare; St. Vincent’s rocks, near Bristol, among limestone. It. 
3 — 5. — Habit of Sisymbrium Tha.lia.num, but perennial; root-leaves 
strongly ciliated with frequently forked or trifid hairs ; flowers twice 
the size ; stem-leaves few, small. 
2. A. petraea DC. ( alpine R.') ; radical leaves lyrato-pinnatifid 
stalked, cauline ones petioled nearly undivided, petals obovate 
clawed spreading, pods spreading twice as long as the pedicels, 
C 
