286 Sir J. E. SurTü's Observations on the Genus Teesdalia. 
description. In vain, however, have I sought for any character, 
or for the slightest difference in the appearance of any other part 
of the plants, between the Lepidium and Iberis in question. The 
latter seems confined. to the more northern parts of Europe, the 
former to the south. Both grow in dry gravelly situations, flow- 
ering in the spring. "The Iberis is never found to vary with us, in 
the proportion of its petals, or number of its stamens, each of which: 
last has its own scale-like appendage, which could not escape the 
accuracy of Mr. Sowerby, in making his drawing for English Bo- 
tany, the only work, I believe, in which these appendages, in the 
Iberis, have been mentioned, till you happily fixed on them as a 
part of the character of your Teesdalia. ‘They are indeed shown 
in Mr. Curtis's plate, Fl: Lond. cin vi. £. 42, but totally neglected. - 
in the description. 
"The Lepidium in question seems "to be e eai our gardens. 
It is much to be wished that we might have an opportunity of 
cultivating and examining so curious a plant. We might then 
be able to determine whether its characters were constant. In 
the mean while I think we must presume it to be a distinct spe- 
cies from the Iberis, though I am satisfied, beyond all doubt, that 
they must belong to one genus. I therefore concur with you in 
leaving the irregularity of the petals out of the generic character, 
which may, in that case, be thus expressed. 
TEESDALIA. 
Silicula emarginata, obcordata, loculis dispermis. 
Filamenta basi intüs squamigera. — 
The species will be : 
1. T. nudicaulis, petalis inequalibus. 
Iberis nudicaulis. Linn. 
2. T. regularis, petalis equalibus, floribus tetrandris. = 
Lepidium nudicaule. Linn. Although 
