2909  #TETRADYNAMIA. SILICULOSA. 
SILICULOSA. 
MY’AGRUM. Tourn. 99. Gertn, 141. 
Cai. Cup 4 leaves ; leafits egg-oblong, concave, standing 
open, coloured, deciduous. io 
Buoss. 4 petals, forming a cross. Petals flat, circular, 
blunt ; claws slender. See 
Stam. Filaments 6, as long as the cup, the 4 opposite — 
ones rather longer than the other 2. _Anthers simple. - 
Pist. Germen pon Style thread-shaped, as long 
as the cup. Swmmit blunt. lager oe 
S. Vess. Pouch inversely heart-shaped, somewhat com- _ 
pressed, entire, rigid, terminated at the point an | oF 
conical style.” Valves 2, (Some of the ¢ ten 
empty.) hese 
SEEDs roundish. wie 
Oss. Myagrum satiowm is the only British plant that has 
been referred to this genus, but it ill accords with its charac- 
ters; on which account Professor Gmelin has constituted @ 
new genus called Mancura, which includes the Myagrum 
sativum, Draba aizoides, Alyssum incanum, and campestre. 
4 
BU/NIAS. Town. 103, Erucago. Geertn, 142. 
Se 4 leaves ; leafits egg-oblong, expanding, de: 
ciduous. i 
Buoss. 4 petals, forming a cross. Petals inversely $68" 
_ shaped, twice as long as the cup; claws taper, upghh — 
STAM. Filaments 6, as long asthe cup, the 2 opposi® — 
a not quite so long. Anthers upright, cloven at the 
ase. + Th UT AY eee 
Pist. Germen oblong. Stylenone. Summit blunt. 
S. Vess. Pouch irregular, ege-oblong, with 4 sides, 0g — 
_ .with 1 or 2 projecting points, not opening, dec 
SEEDS fe roundish, 1 placed under each point 
pouch, 7 see oe 
CRAM’BE. Tourn. 100 & 99, Rapistrum. Gaertn. 143. 
Cat. Cup 4 leaves; leafits exg-shar “channelled, ra 
expanding, deciduous. ea ee 
Boss. 4 petals, forming a cross. Petals large; NO? 
broad, expanding; claws upright, but standing °°” 
open, as long as the cup, ; ee 
