Barleria.] AcANTHACEEX (Clarke), 45 
quite to the tip with 1 mid-nerve; posticous segment of nearly 
equal length, rather narrower; 2 inner segments much smaller. 
Corolla with a cylindric tube, 2-lipped or subequally 5-fid ; 
segments not contorted in bud. Stamens 2 perfect, 2 rudimentary 
often added ; anther-cells 2, parallel at equal height, not spurred at 
the base; pollen globose, honeycombed. Ovary with 2 (or 1) 
ovules in each cell; style long; stigmas 2, short or subconfluent. 
Capsule either ovoid 2-seeded, or ellipsoid 4-seeded; flattened, 
sometimes (when 2-seeded) beaked, usually hard and shining ; seeds 
large, shaggy with hygroscopic hairs. 
Inflorescence (when fully developed) of axillary often scorpioid cymes, sometimes 
forming dense 1-sided many-flowered strobilate spikes, sometimes reduced to 
3-2-flowered clusters or (apparently) solitary flowers; the axillary quasi-solitary 
flowers again not rarely ranning into terminal heads or spikes. 
Species 120, mostly in Africa and Tropical Asia, a few in America. 
Series A. Interpetiolar spines (i.e. reduced leaves of sterile shoots or outer- 
most bracts of axillary flowers or inflorescences) often present. Posticous sepal 
spine-tipped or with teeth on its margin. 
Section 1. Prrionitis. Lower ovule in each cell minute or 0 3 capsule never 
having more than 2 seeds, ovoid with conic beak  Posticous sepal spine-tipped or 
mucronate, without teeth on itsmargin, Corolla in the Cape species yellow. 
Corolla 2-lipped ; 4 posticous segments in llip .., (1) Prionitis. 
Corolla subequally 5-fid; tube long linear sentra) Holubii. 
Section 2. AcanrHorpea. Ovary with 2 similar ovules in each cell; capsule 
often 4-seeded. Posticous sepal usually prominently (rarely obscurely) toothed 
on its margins. Corolla in the Cape species blue-purplish (or white), 
Leaves less than 1 in. long ; small shrubs; racemes 
few-flowered : 
Leaves ovate to lanceolate; prickly harsh 
plants : 
Posticous sepal spinous-ciliate on the 
margins: 
Branches and leaves hispid beneath... (3) pungens. 
Branches and leaves pubescent beneath (4) irritans. 
Posticous sepul obscurely or obsoletely 
toothed... ca es is ... (5) stimulans. 
Leaves linear to linear-oblong; twiggy, less 
harsh, plants : : 
Corolla-tube in. long... sie ... (6) Virgula. : 
Corolla-tube Zin. long... bie ... (7) bechuanensis, 
Leaves, many of them, 1 iv. long; racemes few- 
flowered : : 
Posticous sepal not (or rarely obscurely) spine- 
toothed ... ae des abe ee ... (8) acanthoides, 
Posticous sepal deeply and rigidly spine- 
toothed... vel a ee --. (9) elegans. 
Posticous sepal with many short innocuous 
teeth: 
Innovations and young leaves without 
stellate hairs: 
Bracts to raceme subspinous; leaves 
(some of them) petioled ; 
Corolla 1} in. long; petioles less ee 
than 2 in. moe sist (10) Gueinzii, 
Corolla 12? in. long; petioles up 
to4 Ay Son eo ue ... (11) barbata, 
