Thunbergia, DIDYNAMIA ANGIOSPERMIA, 35 
four-winged. Leaves opposite, petioled, spreading, cordate, 
often angle-lobed, pointed, from five to séven-nerved, a little 
scabrous from small stiff white hairs on both sides; floral 
leaves of the racemes small, otherwise like the rest. Peti- 
oles erect, nearly as long as the leaves, swelled near the base, 
- channelled, scabrous. Stipules none. Peduncles axillary, so- 
litary, or paired ; or in brachiate pairs, i. e. two or three pairs 
on terminal racemes, which if not supported, become beauti- 
fully bowin g, like elegant festoons. Pedunceles of the axilla- 
ry flowers, nd pedicels of the raceme, round, somewhat cla- 
vate, as long as the petioles, one-flowered. Flowers very 
large, being about four inches broad when expanded, colour 
a beautiful light blue. Bractes none. Calyx; spathe two- - 
valved, obliquely-oblong, the under margins being more 
rounded and open; the upper almost straight, and slightly 
united, sometimes their whole length, though in general only 
near the apex, striated, pointed, a litile hairy, and mark- 
ed with small black dots, they are about as long as the 
tube and throat of the corol. Corol one-petalled, campanulate, 
sitting on a nectarial ring. -Tube short and conical; throat 
ample, with a long, vaulted concavity on the upper side, 
where the stamens and style are. lodged; on the opposite 
side is a large corresponding convexity, which is elegantly 
streaked with deeper and lighter blue. Border five-parted ; 
divisions nearly round, the superior two erect, the inferior ones 
expanded. Nectary a large lobate body, surrounding the 
base of the germ, the coro] inserted into it. Stamens within 
the throat. Filaments four, inserted on the mouth of the 
tube, interior pair much curved, and although longer than the 
other pair, yet from the curvature, their anthers are not more 
elevated. than those of the other, or posterior pair; oblong, 
ovate, compressed, rugose. Anthers converging, equal, i- 
near, erect, two-celled, margins of the cells bearded, as in 
Acanthus ; each of the cells of the interior anthers, armed with 
a eevee -_ es exterior coll off i 
Ba x 
