754 TETRADYNAMIA. SILICULOSA. Draba. 
V. atJnua. Leaves wing-cleft: pouches pendent. 
(E. Bot. 1442. E.)— Kniph. 10— Clus. ii. 130. 1— Lob. Ohs. 102. 3, and Ic. 
i. 205. 2— Ger. Em. 247. 4— Park. 830. 2 -J. B. ii. 920— Pei. 50. 5— 
Trew. PI. Rar. 
Stem (three or four inches high. E.) branches hairy. Leaves , segments 
strap-shaped, toothed, hairy. Petals white, (or yellowish, E.) with deep 
purple veins. Pouches bristly, egg-shaped, terminated by the extention 
of the petition. Woodw. 
Cress Rocket. Annual Cresset. On Salisbury Plain, not far from 
Stonehenge. Ray. (Not found there since. An elegant little plant, 
whose delicate structure might readily cause it to be overlooked. E.) 
A. June. 
STJBULA'RIA.* Pouch entire, transversely compressed: 
Valves tumid : Style shorter than the pouch : ( Seeds nu¬ 
merous. E.) 
S. AQUAThCA. 
Dicks. H. S. — {Hook. FI. Lond. 135— E. Bot. 732. E.)—- El. Dan. 35— II. 
Ox. viii. 10. 2d—Pet. 48. 8 —Pluk. 188. 5. 
Flourishes and blossoms under water. Linn. Leaves green, semi-cylindri¬ 
cal, full of pith. Blossom white. Ray. ( Flowers small, on fruit-stalks. 
Petals incurved, by which the tender parts of the flower are protected 
from injury under water. Seeds small, egg-shaped, yellow, compressed. 
Leaves all radical. Plant about one inch high. According to Mr. R. 
Brown scarcely distinct from Dr aba. E.) 
Water Awlwort. (Irish Rush Cress. Welsh: Myndwydlys dyfr - 
drig. E.) Grows under water on a gravelly bottom in Lough Neagh, 
Ireland, on the side next Kilmore. Ray. (Lough Carban, a little north- 
west of the Gap of Barnesmore, Donegal. E. Murphy, Esq. E.) Loch 
Tay and Loch Carran, Scotland. Mr. Stuart. In lakes on the mountains 
near Llanberris. Hudson. Llyn y Cwn Snovffion. Pennant. Ffynnon 
Freeh near Snowdon. Llyn Aled, Denbighshire. Mr. Griffith. Llyn 
Llyw'enan, Bodedern, Anglesey. Rev. Hugh Davies. (In the Loch of 
Clunie, Perthshire, generally in about four feet water. Mr. Brown. E.) 
A. June—July. 
DRA'BA.f Pouch entire, elliptic-oblong, compressed: Valves 
flat, parallel to the partition: Style none : ( Seeds nu¬ 
merous. E.) 
(D. aizoPjDes. Stalks solitary, naked: leaves lanceolate, rigid, keeled, 
fringed: petals notched, twice as long as the calyx. 
E. Bot. 1271— Jacq. Austr. 2. 192— Ger. Em. 514. 
Leaves all radical, forming dense round imbricated tufts, shining, strap- 
„ spear-shaped, rigid, fringed -with white hairs. Stalks terminal, simple, 
stiff, about an inch high. Floivers corymbose, bright yellow. Calyx- 
leaves elliptical, concave. Petals twice as long as the calyx, inversely 
* (From sitbula , an awl; as having awl-shaped leaves. E.) 
i* (From acrid ; the leaves of some species being pungently so. E») 
