44 XCVIII, ACANTHACEE (CLARKE). [Brillantatsia, 
Imperfectly-known Species. 
B. hirsuta, 7’. Anders. in Journ. Agric. Hort. Soc. India, N.S. i. 
1868, 267. 
8. RUELLIA, Linn.; Benth. et Hook. f. Gen. Pl. ii. 1077. 
Calyx (in Tropical African species) divided deeply into five subequal 
segments. Corolla 4-5} in. long; tube inflated nearly from the base, 
or linear-cylindric portion 2-3 in. long; not decisively 2-lipped ; lobes 
contorted in bud. Stamens 4, subsimilar; anther-cells 2, not spurred 
at the base; pollen globose, surface reticulate or honeycombed. Style 
with one oblong-linear branch, the other suppressed; ovary with 6-16 
ovules, glabrous or hairy. Capsule cylindric, perfecting more than 4 
seeds. Seeds nearly glabrous on the faces, with much hygroscopic white 
hair on the margin. Leaves wavy crenate or subentire, not distinctly 
toothed ; not very unequal at the base, nor those of one pair very un- 
equal. Flowers axillary, solitary or in small cymes, not running into 
strobilate spikes. Bracteoles small or large, but not enclosing the 
calyx. 
Species 200, in all warm regions. 
The Tropical African species, with two exceptions, belong so far as known to ic 
subgenus Dipteracanthus; these are recognised generically at a glance by t te 
clavate many-seeded capsule ; when no fruit is present, the herbarium examples can 
usually recognised by the honey-combed pollen ; most of the neighbouring genera have 
ribbed pollen, 
* Dipreracantnus. Capsule clavate ; lower portion solid, 
subcylindric. Seeds imbricated obliquely all near the 
to 
p- 
Corolla 3-2 in. long ; linear portion of tube less than } in. 
long. Calyx 3-3 in. long, teeth usually acute. 
Ovary (except tip) glabrous. Calyx 3-3 in. long. 
Leaves petioled. 
Leaves 1-14 in. long, ovate, subobtuse . 
Leaves 2-3 in. long, elliptic, tip triangular acute . 
Leaves subsessile. 
Leaves 1-14 in. long, elliptic, sparsely hispid 
Leaves 1} in. long, oblong, hispid . 
Leaves less than 4 in, long, ovate, scaly . 
Ovary (and capsule) hairy nearly or quite to the base. 
Calyx 4-§ in. long. 
bho 
. 
. BR. patula. . 
R. pretermissa. 
3. R. sudanica. 
4. R, lewcoderma. 
5. BR. placoidea 
Leaves 2-3 in. long, elliptic-lanceolate, hispid . . 6. BR. prostrata. 
Leaves 2-3 in. long, elliptic, nearly glabrous, lower 
obtuse . . . . . . . 7 R. genduana. 
Leaves 2 in. long, 1 in. broad . . . . 8 
. R, lineari-bracteo- 
lata. 
Corolla very long ; linear portion of the tube 1-3 in. long. 
Calyx-teeth not acute. 
Innovations with stellately-tomentose hairs, Corolla- 
tube 14-2 in. long 
Plant without stellate hairs. 
Corolla-tube subcylindric, inflated only close to the 
top. 
s© 
R. discifolia. 
