Blepharis.] 
Leaves linear-oblong ; 
short . . . . . . 
Bracteoles at least 4 as long as the calyx, lanceolate, 
l-nerved. 
One-flowered branches solitary. 
Corolla 3 in. long. 
Leaves not bristly. 
Herb. Leaves hairy or glabrate . 
Dense woody undershrub. Leaves small, 
glabrate . . . . 
Leaves scabrous with white stiff hairs 
inmost calyx-segments 
XOVIII. ACANTHACEE (CLARKE). 
7, B. Bainesii. 
. B, molluginifolia, 
. B. fruticulosa, 
95 
9. B. setosa, 
Corolla 1 in. long . . . . 11. B. ruwenzoriensis. 
One-flowered branches approximate or in heads 
or strobilate. 
Corolla blue. 
Spikes in loose heads. 
Two innermost calyx-segments short . 12, B. pratensis. — 
Two innermost calyx-segments long 13, B. Welwitschii. 
Spikes strobilate; leaves linear, sometimes oo 
slightly toothed . . . . . 14, B. linariefolia. 
Spikes dense, compound, terminal ; flowers large 15. B. Asteracanthus. 
« Corolla clear yellow . ee 16, Be Sol. 
Leaves prickly-spinous on the margins (see also 6. B. 
affinis, 14. B. linariefolia, 15, B. Asteracanthus, 
in which the leaves are sometimes toothed). 
Leaves in each pseudo-verticil 4, heteromorphic, the 
outer pair (in the middle of the stem) often much 
reduced, appearing as spinous stipules. . 
Leaves linear ; inflorescences of short heads . . 17. B. Buchneri, 
Leaves broad-elliptic; inflorescences strobilate . 18. B. chrysotrioha. 
ves in decussate subequal pairs. . . . 19. B. tetrasticha, 
ves in each pseudo-verticil 4, not very unequal. 
Ovary (and fruit) with a large horny obversely ; 
mitriform cap . . . . . 20. B. obmitrata. 
Ovary without a large cap. 
Inflorescences strobilate. ; 
Leaves with spreading teeth ; spikes close . 21. B. edulis. 
Leaves with forward-pointing teeth; spikes 
looser . . . . . . . 22. B. serrulata, 
One-flowered branches in dense scorpiod com- ; . 
pound cymes . . . . . 24, B. panduriforms, 
One-flowered branches in numerous axillary sub- 
capitate cluster . 
Corclla shaggy * . 25. B. acanthodioides. 
Corolla slightly hairy . . . . 26. B. longifolia. 
One-flowered branches solitary or 2-4 approxi- 
5 mated, sod 
Ines 1-2 j i w ’ 
P spinon in, Tong, Tinear, stout, y 93, B. Noli-me-tangere. 
Spines }-1 in, long. 
Leaves oblong-elliptic ; 1-flowered branches oo, 
mostly 2-4 together . . . . 27. B. diversispina. 
Leaves linear or linear oblong ; 1-flowered 
branches solitary . 29. B. pungens. 
One-flowered branches in dense heads 2-3 in. in 
diam, . . 
. 28. B. grandis. 
