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 he Id 



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A^rabis.'] 



VI. CRUCIFER^ : ARABIDE.E 



25 



shorter than the transverse diameter of the oblong-ovate or 



cordate terminal lobe. B. stricta Andr. 



Pastures and hedges, frequent, 

 stout, furrowed, branched, glabrous. 



7JL. 5—8. 



Stem 1 — 2 feet hiffh, 



Petals yellow, usually the 



length of the calyx, or in what is called B, arcuata, twice as long. 



Style conspicuous. 



(early W,) 



tipper ones pinnatifid, segments linear oblong entire, pods linear 

 compressed obtuse scarcely thicker than the pedicel. Erysi- 



read ^^^^ ^- -^- ^- 1129. 



Waste places in Devonshire and el^ewhere- 

 1 — 2 feet high ; more slender than the last 



Style very short. 



^. 4 — 10. — About 

 in every part ; flowers 



t - smaller; pods longer. 



4. TuRKiTis Li7in. Tower-Mustard. 



Pod elongated, compressed, 2-edged ; valves nerved or keeled. 

 Seeds in a double row. Calyx nearly equal at the base. 

 Named from ferrz5, a tower ; the leaves becoming gradually 

 smaller upwards, so that the plant assumes a pyramidal form, 



1. T. glabra L. Qong-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, Par- 

 tick, and Iledgorton (Perthshire), in Scotland. 0. 5 — 7. — Stem I 



2^ feet high. Leaves oblong-lanceolate, glaucous, radical ones 

 toothed or sinuate at the base, cauline ones sagittate. Flowers yel- 

 lowish-white. Pods long, erect. In this genus there are no glands 

 between the larger stamens. 



5. A''rabis Linn. Eock-Cress. 



the nearly sessile 

 Seeds in one row. 



Pod linear, compressed, crowned with 

 stigma ; valves nerved or coarsely veiny. 

 Calyx erect. — Name from apa^ig^ applied by Dioscorides to 

 Lepidium Draha. 



1 . A. stricta Huds. {Bristol iJ.) ; 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. 1/.. 

 3— 5.— Habit of Sisymbrium ThaUanum, but perennial; root-leaves 

 strongly ciliated with frequently forked or trifid hairs; flowers twice 

 the size ; stem-leaves few, small. 



2. A. petne'aDC. (alpine R.) ; radical leaves lyrato-pinnatifid 

 stalked, cauline ones petioled nearly undivided, petals obovate 



, :P clawed spreading, pods spreading twice as long as the pedicels. 



