CRUCIFER. 207 
This plant resembles T. occitanum, but produces from the 
rootstock more numerous and almost always simple stems. The 
stem leaves are more numerous, closer together, and smaller; the 
corymb larger; the petals less tinged with lilac; the sepals usually 
purplish ; and the pod truncate, emarginate at the apex, so that, 
though the style is not actually longer than in 'T. occitanum, it 
appears to be so; wing narrow. The leaves are also rather less 
glaucous. 
Specimens of T. virens, authenticated by M. Jordan, from Mont 
Pilate differ from the Derbyshire plant in having the petals obovate 
instead of oblanceolate. 
Green Alpine Penny Cress. 
GENUS XX.—_IBERIS. Linn. 
Sepals nearly erect, equal at the base. Petals entire, with short 
claws, unequal, the two that point away from the stem much larger 
than the others. Filaments without wings or appendages. Pods 
much compressed at right angles to the replum, ovate, oblong, or 
roundish, generally notched at the apex; valves keeled down the 
back, the keel produced into a wing, which is most developed 
towards the apex; style conspicuous or elongated. Seeds oval- 
lenticular, not winged, only 1 in each cell of the pod. 
Herbs or undershrubs, generally glabrous. Leaves rather 
narrow, entire or pinnatifid. Flowers white or purplish, in radiant 
corymbs, sometimes elongating into short racemes, but often 
remaining corymbose, even when the fruit is mature. 
The name of this genus comes from Iberia, where it was first found. The species 
still abound in Spain, which is the modern Iberia. 
SPECIES lI—IBERIS AMARA. Linn. 
Puate CXLIX.* 
Reich. Ic. F). Germ. et Helv. Vol. IL. Zetr. Tab. VII. Fig. 4197. 
Stem herbaceous. ‘Leaves oblanceolate or strapshaped-oblan- 
ceolate, generally toothed or pinnatifid. Pods in a short raceme, 
sub-orbicular, attenuated towards the apex ; wings of the valves 
extremely narrow towards the base, broader towards the apex, 
and terminating in acute lobes separated by a triangular sinus; 
style a little longer than the lobes of the wing. 
* Drawn for the present edition by Mr. J. E. Sowerby. 
