28 vi. ceucifeeje : altssine^e. \_ Armordcia . 
supposed to be produced by the acrid and pungent quality of 
this plant. 
1. N. officinale Br. ( common JV.) ; leaves pinnate, leaflets 
ovate subcord, ate sinuato-dentate, petals (white) twice as long 
as the calyx, pod linear. Sisymbrium Nasturtium L. : E. B. 
t. 855. 
Brooks and rivulets frequent. fl. 5 — 10. — A well-known 
aquatic plant, and an excellent and wholesome salad. Lower leaves 
large, of 5 — 7 distant leaflets , the terminal one the largest and round- 
est ; caulbie leaflets subovate, sometimes oblong, all rather succulent, 
glabrous, more or less waved or toothed. Pods about an inch long, 
about as long as the pedicels, curved upwards. Hypogynous glands 4. 
2. N. sylvestre Br. ( creeping F); leaves pinnate, leaflets 
lanceolate cut, those of the uppermost leaves nearly entire, 
rhizome creeping, petals (yellow) twice as long as the calyx, pods 
narrow oblong or linear. Sisymbrium L.: E.B. t. 2324. 
Water-sides and waste places, but not common ; very rare in 
Scotland. 2} . 6 — 8. — Rhizomes much creeping. Stem 1 foot high, 
angular, branched. Rachis often slender and zigzag. Pedicels 
patent; pods also patent or curved a little upwards, varying from 
to 9 lines long (DC.), usually about the length of the pedicels, but 
often longer, sometimes shorter. Hypogynous glands 6. 
3. N. terrcslre Br. ( Marsh H); leaves lyrato-pinnatifid un- 
equally toothed, root small fibrous, petals (yellow) not longer 
than the calyx, pods oblong turgid and the septum 2 — 4 times 
longer than broad. N. palustre DC. : Benth. Sisymbrium ter- 
restre. E. B. t. 1747. 
Watery places. 0. 6 — 10. — One foot high, branched. Pods 
about as long as the spreading pedicels, ascending. Distinguished 
chiefly from the last by wanting a creeping rhizome, pinnatifid not 
pinnate leaves, minute petals, and more turgid pods. 
Tribe II. Alyssine;e. Pouch with the dissepiment in the 
broadest diameter: valves flat or concave. Cot. o=. (Gen. 
9—12.) 
9. Armobacia Rupp. Horse-Radish. Water-Radish. 
Pouch elliptical or globose, many-seeded : the valves turgid, 
not nerved. Filaments simple. Hypogynous glands 6. Seeds 
not margined. Calyx patent. — So named by the Romans 
from A rmorica, or Brittany, where it was supposed to grow 
abundantly. 
1. A. amphibia Koch ( great IF.); leaves oblong pinnatifid 
or serrate, root fibrous, petals (yellow) twice as long as the 
calyx, pouch 2 — 3 times shorter than the pedicel, stigma capi- 
tate. Nasturtium Br. : Benth. Sisymbrium L. : E. B. t. 1840. 
