144 XCVIII. ACANTHACEE (CLARKE). 
Floral leaves, thick, brown-red, viscid . . 53. 
Floral leaves white-ciliate . . : . 54 
Outer floral leaves elliptic, but little imbricated. 
Leaves apiculate; calyx 2} in. long. . . 56. 
Leaves obtuse; calyx 3 in. long . . . 57. 
Flowers in short unilateral axillary. cymes . . 58. 
ttt Villose.—Leaves when mature more or less hairy on the 
surface, with no stellate nor centrally fixed hairs. 
Cymes short, 3—1-flowered, approximated in the upper 
axils, so as to form a terminal, more or less inter- 
rupted spike. 
Species of West Africa. 
Dark green; posticous sepal quadrate-oblong . 59. 
Very villous; posticous sepal lanceolate . - 60. 
Species of East or East Central Africa. 
Posticous sepal quite entire. 
Yellow-green, strigose with tawny hairs . 61. 
Dark green, mature leaves minutely hairy . 62. 
Spikes strobiliform, softly grey-villous . . 63. 
Posticous sepal minutely toothed . . . 64. 
Cymes not strobilate ; many of the few-flowered cymes 
in distant axils, or on shortened lateral branches. 
Corolla (in total length) 14—2 in. 
Species of West Africa. 
Flower-clusters axillary ; bracts nearly glabrate 65. 
Flowers 3 or 4 subterminal; bracts softly 
hairy . . . . 
Species of East Africa. 
Leaves tapering at the base. 
Leaves 4-6 in. long, subsessile. 
Leaves uniformly pale green beneath  . 67. 
Leaves strongly reticulated beneath . 68. 
Leaves seldom up to 13-2 in. long, very 
shortly petioled. 
Posticous sepal 3 in. long, ovate. . 69 
66. 
Posticous sepal 1 in. long, cordate . . 70 
Posticous sepal 3 in, long, ovate. . 71 
Leaves rounded at the base, conspicuously 
petioled . . . . . . 72 
Corolla (in total length) 2-3 in. 
Posticous sepal subentire. 
Leaves 13 in. long, villons ; posticous sepal 
3 in, long. . . . . . 73 
Leaves 5—# in. long, villous; posticous sepal 
4-4 in. long . . 75. 
Leaves 1} in. long, strigose; posticous sepal 
nearly 4 in., rounded . . . 76 
Posticous sepal toothed 
. 74, 
Floral leaves ultimately papery . . . . 55. 
[ Barleria. 
B. stellato-tomentosa. 
B. stelligera. 
B, albostellata. 
B. salictfolia. 
B. Hildebrandti. 
B. fulvostellata. 
B. opaca. 
B, villosa, 
B, ventricosa, 
B. Grantii. 
B, Limnogeton. 
B. vix-dentata, 
B, ruellioides. 
B. Antunes. 
B. Holstiv. 
B. neurophylla. 
. B. repens. 
. B. querimbensis.. 
. B, Boehmii. 
. B. Volkensii. 
. B. Stuhlmanni. 
B, usambariec. 
. B. rotundisepala, 
B. micrantha. 
1. B. Prionitis, Linn. Sp. Plant. 636.  Glabrous or slightly 
hairy. Stems 1-3 ft. high. Leaves up to 7 by 2 in. (commonly 
34 by 1 in.), elliptic, narrowed at both ends, entire, full of cystoliths; 
petiole 0-} in. long ; young and floral-leaves narrowed at the base, 
