28 VI. CRUCiFER^ : ALYSSiNE^. lAr?nordcia 



supposed to be produced by the acrid and pungent quality of 

 XDis picint* 



1. ]Sr. officinale Br. (common W.) ; leaves pinnate, leaflets 



ovate subcordate sinuato-dentate, petals (white) twice as loner 



as the calyx, pods linear. Sisymbrium Nasturtium Z. • K: T? 

 t. 855. ' -^'Mi. 



Brooks and rivulets, frequent. Ij.. 5— 10.— A well-known 

 aquatic plant, and an excellent and wholesome salad. Lower leavei 

 large, of 5— 7 distant leaflets, the terminal one the largest and round- 

 est; ca?^7me Zea/e^s subovate, sometimes oblong, all rather succulent" 

 glabrous, more or less waved or toothed. Pods about an inch Ion?' 

 about as long as the pedicels, curved upwards. Hypogynous glands 4 



2. 



{creep 



lanceolate cut, those of the uppermost leaves nearly entire, root 

 creeping, petals (yellow) twice as long as the calyx, pods narrow 

 oblong or hnear. Sisymbrium L.: E. B. t. 2324. 



Water-sides and waste places, but not common ; very rare in 

 Scotland. 1^. 6 — 8. — Roots much creeping. Stem 1 foot hio-b 

 angular, branched. B.acMs often slender and zigzag. Pedkek 

 patent; pods also patent or curved a little upwards, varying from 3 

 to 9 lines long {De C), usually about the length of the pedtcels, but 

 often longer, sometimes shorter. Hypogynous glands 6. 



■ 3. N. terresfre Br. (Marsh Y.) ; leaves lyrato-pinnatiffd un- 

 equally toothed, root simply fibrous, petals ()^ellow) not longer 

 than the calyx, pods oblong turgid and the septum 2—4 times 

 longer than broad. ■""" - 



E. B. t. 1747. 



N. palustre DC. Sisymbrium terrestre. 



Watery places. ©. 6 — 10. — One foot high, branched. 



about as long as the spreading pedicels, ascending. _..._..».„ 



chiefly from the last by its fibrous root, pinnatifid not pinnateTeaves" 

 minute petals, and more turgid pods. 



Pods 



Distinguished 



WH' 5 



(Gen. 



Tribe IL Alyssine^. Pouch with the dissepiment in the 

 broadest diameter : valves fiat or concave. Cot. o 

 9—12.) 



9. ARMORicTA Biipp. Horse-Radish. Water-Radish. 



Pouch elliptical or globose, many-seeded : the valves turgid, 

 not nerved. """ 



not margined. 



Filaments simple, Hypogynous glands 6. Seeds 



^ ^ - So named by the Romans 



from Armorica, or Brittany, where it was supposed to grow 

 abundantly. ^ ' 



Calyx patent. 



1. A. amphibia Koch {great W.) 



or serrate, root fibrous, 

 calyx, pouch 2—3 times 



petals (yellow) twice as long as the 

 shorter than the pedicel, stigma capi- 



tate. Nasturtium Br. Sisymbrium Z. ; E. B. t, 1840. 



f 



