4 ACANTHACEE (Clarke). [ Thunbergia. 
Section 1. TuunsErciopsis, Lindau. Calyx-teeth 
about 5 (but irregular), short-ovate; stigma funnel- 
shaped a6 so cua nee os aes 0 
Section 2. Ev-THunpereia, Lindau. Calyx-teeth 
about 12, linear. One lobe of the stigma below the 
other. : 
Anther-cells without linear spurs at the base : : 
Leaves all sessile si ot wa ... (2) capensis. 
Some leaves petioled, 1-2 in.long ... ... (3) purpurata. 
Some anther-cells (6 or 4 in each flower) with linear 
rigid spurs at the base ; 
Leaves all sessile, i.e. petioles of the lower 
leaves 0-4 in: long: 
Glabrous ... hes ee < ws (4) Galpini. 
(1) natalensis, 
Hairy: 
Leaves lanceolate to linear, 2 in, 
long : 
Bracteoles 2 in. long... .» (5) Venosa. 
Bracteoles § in. long... ... (6) stenophylla. 
Leaves elliptic or ovate: 
Bracteoles cordate at the base ..,_ (7) cordibracteata. 
Bracteoles rounded or truncate at 
the base : 
Style densely hispid in the 
upper part soe .. (8) hirtistyla. 
Style glabrous : 
Leaves ovate... (9) atriplicifolia. 
Leaves elliptic or oblong : 
Jeaves narrow-tri- 
angular at the 
top, pointed : 
Some leaves .. 
toothed ... (10) aspera. 
Leaves all en- peo 
tire ... (11) xanthotricha. 
Leaves obtuse tri- 
angular at the tip (12) Bachmanni. 
Petioles of the middle and ines sisi leaves (2) 
4-4 in. long : 
Hispid ; bracteoles }-in. long ee, ... (18) neglecta. 
Softly villous; bracteoles 3 in. long (is) mn. 
Some petioles of the middle stem-leaves exceed- 
ing # in. in length: 
_—— i leaves entire (base sometimes ‘ 
ANQUAT) ie aes nee 1 ees) ase (15) pondocnsis. 
Leaves or many of them angular and = 
toothed : 
Petioles not winged ; corolla white ... (16) dregeana 
Petioles winged; corolla (usually) ew 4 
yellow with dark eye Sx <i (17) alate. . 
1. T. natalensis (Hook. Bot. Mag. t. 5089) - thinly hairy or 
glabrate ; stem shrubby, 2 ft. high, iemanhed ; ul 9-4 cag 
oblong or elliptic, acute, cordate at the base, usually subentire but often 
sinuate-toothed and occasionally coarsely toothed, subhastate ; petiole 
usually less than 3 in. long, sometimes 47% in.; bracteoles 812 in 
long, lanceolate, acute, veined ; ealyx-tube & in. long; lobes 5, 
shallow, ovate, hardly 54, in. long ; corolla-tube 1-12 in, long, much 
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