790 
TETRADYNAMIA. 
Hutchins'ia petrje^a. ( Lepidium petrceum.) Leaves winged, very- 
entire : petals scarcely longer than the calyx: pouch on both 
sides blunt: stigma sessile. 
Teesda'lia nubicau'lis. ( Iheris nudicaulis .) 
Iberis ama'ka. (I. amara.) Herbaceous : leaves spear-shaped, rather 
sharp-pointed, slightly toothed, smooth: flowers in bunches. 
Lepidi'um LATiFo f LiUM. (L. latifolium.) Leaves spear-shaped, undi¬ 
vided, serrated, or entire: pouch oval, entire. 
-_- rudera'le. (L. ruderale.) Flowers diandrous, without 
petals: root-leaves wing-cleft ; those of the branches strap-shaped, 
entire : pouch notched at the end, expanding. 
— -campes'tre. ( Thlaspi campestre.) Pouch egg-shaped, 
notched at the end, winged: stem-leaves arrow-shaped, toothed. 
Cochlea'ria officinalis. (C. officinalis.) Pouch nearly globular: 
root-leaves kidney-shaped. 
— — —-- An'glica. (C. Anglica.) Pouch elliptical: root-leaves 
egg-shaped, entire. 
— -Dan'ica. (C. Danica .) Pouch elliptical: all the leaves 
deltoid. 
— .. Armora^cia. (C. Armoracia.) Pouch oblong, summit 
dilated, nearly sessile: root-leaves oblong, scollopped; those of 
the stem long-spear-shaped, toothed or snipt. 
Subula'ria aquat'ica. (S. aquaiica .) 
Dra'ba ver'na. (I), verna.) Flower-stalk naked: petals deeply di¬ 
vided into two parts: leaves spear-shaped, slightly snipt, hirsute. 
— - RurESTRis. (D. hirta.') Flower-stalk naked, or with one 
leaf: petals undivided: pouch spear-shaped, pubescent: leaves 
flat, spear-shaped, hairy. 
. .. - incana. (D. incaha.) Stem-leaves numerous, hoary, slightly 
toothed: pouch oblong, smooth, twisted. 
► . mura'lis. (D. muralis .) Stem branched: leaves egg-shaped, 
embracing the stem, toothed: pouch expanding, smooth. 
— aizoi'des. (D. aizoides.) Flower-stalk naked, smooth: leaves 
spear-strap-shaped, rigid, keeled, fringed: stamens as long as the 
petals: style half the length of the germen. 
Camelina sati'va. (Myagrum sativum.) Pouch inversely egg-shaped, 
bordered: summit undivided: leaves spear-arrow-shaped. 
Alys'sum marit'imum. (A. halimifolium.) Pouch entire, smooth: 
cells many-seeded: filaments without teeth: leaves strap-spear¬ 
shaped, sharp-pointed, slightly hoary: hairs divided, laid flat. 
SIL1QUOSA. 
Cardam'ine bulbif'era. (Dentaria bulbifera.) Stem strictly undivided: 
lower-leaves winged: upper ones simple. 
