46 ACANTHACE® (Clarke). [Barleria. 
Bracts to heads more spinous ; leaves 
all subsessile : 
Posticous sepal $ to 1d in. long... (12) Woodii. 
Posticous sepal less than ? in. 
longs: a ie ... (13) jasminiflora, 
“ Innovations and young leaves densely 
stellate-hairy ss ‘@ ... (14) affinis. 
Leaves usually less than 1 in. long; racemes 
normally many-flowered, in fruit very thick; 
trailing plants: 
Thinly hispid; posticous sepal with short 
spine-tip pte ase as -“ ... (15) macrostegia. 
Villous ; posticous sepal with long spine-tip : 
Posticous sepal strongly spine-toothed on the 
... (16) lichtensteiniana. 
margins ie i es ae 
Posticous sepal softly villous, not toothed on 
the margin ... a ah ee ... (17) media, 
Series B. Spineless. Posticous sepal without teeth (or very obscurely 
toothed) on its margin. 
Flowers mainly in long terminal spikes : 
Spikes long-cylindric ..., ee eos ... (18) crossandriformis, 
Spikes ovoid ies “os us Sis ... (19) ovata. 
Flowers in loose cymes obs ae .+» (29) ovtusa. 
Flowers solitary or in small clusters : 
Plants, especially the inflorescence, hairy : 
Capsule glabrous, or very nearly so : 
Leaves narrowed into a very short 
petiole : 
Stem thinly hispid; corolla blue (21) meyeriana. 
Stem densely and minutely grey- 
hairy; corolla yellow... .-. (22) cinereicaulis. 
Leaves subsessile, almost rounded at 
the base Bas aug in ... (23) Rehmanni. 
Capsule densely hairy upwards... ... (24) pretoriensis. 
Plants very nearly glabrous : 
Leaves subsessile, rounded at the base ... (25) Wilmsii. 
Leaves narrowed at the base into a petiole 
0-} in. long ie ay a .-» (26) Galpioii. 
1. B. Prionitis (Lion. Sp. Pl. ed. i. 636, ed. ii. 887); glabrous 
or nearly so; stems 1-3 ft. high; leaves 2-5 by 4-1 in., elliptic, 
narrowed at both ends, mucronate ; petiole 0-1 in. long; inter- 
petiolar spines (i.e. basal bracts to the inflorescence of the succeed- 
ing year) simple, rigid, 1-3 in. long; inflorescence reduced nearly to 
a simple spike; lower flowers more or less distant, sometimes 2 in 
each axil; flower-bract similar to the external bract, but rather 
longer, dilated lanceolate at the base; posticous sepal nearly 2 in. 
lony, elliptic, acuminate, mucronate, without teeth on its margins ; 
anticous calyx-segment resembling the’ posticous sepal sometimes 
ending in 2 short spinous teeth; corolla yellow; tube hardly } in. 
long ; posticous lip of + connate segments 4-1 in. long; anticous 
segment clawed, shorter; capsule 1-2 in. long, ovoid-conic, beaked, 
2-seeded. Nees in DC. Prod. xi. 237; T. Anders. in Journ. Linn. 
Soe. vil. 28 (only as to non-African plants); C. B. Clarke in Hook. 
J. Fl. Brit. Ind. iv. 483, and in Dyer, Fl. Trop. Afr. v. 145; 
