244 XCVIII. ACANTHACEH (CLARKE). | Peristrophe. 
Nile Land. Dar Fertit: at Dem Bekir, Schweinfurth, ser. 3, 23! Niamniam, 
Schweinfurth, 2885! 
4. P. usta, C. B. Clarke. Dusky, pubescent. Branches 3-9 in. 
long, very numerous, arising after a grass-fire from the woody rootstock. 
Leaves up to 1 by } in., tip hardly acute, base narrowed ; petiole up to 
1 in. long. Spikelets 1-flowered, in mainly terminal spikes up to 1 by 
} in., lax; floral leaves } in. long, linear-oblong. Calyx scarcely ¢ 1. 
long. Corolla } in. long, slender. Stamens 2; anther-cells ,, one 
clearly above the other; pollen as of P. luteoviridis. Capsule 4 10. 
long, slender, 4-seeded, the linear stalk exceeding } in. in length.— 
Duvernoia pumila, Lindau in Engl. Jahrb. xx. 44, and in Engl. & 
Prantl, Pflanzenfam. iv. 3 B. 339, and in Engl. Pfl. Ost-Afr. C. 372. 
Mozamb. Dist. British Central Africa: Nyasaland; Mount Zomba, 4000- 
6000 ft., Whyte! Buchanan, 127! Tanganyika Plateau, Carson ! 
55. HYPOESTES, R. Br.; Benth. et Hook. f. Gen. PI. ii. 1122. 
Sepals 5, equal, small, scarious, minutely puberulous, free or united 
4-2 their length, lanceolate. Corolla small (in Tropical African species), 
2-lipped half its length, rose-purple to white (often spotted) ; tube 
slender, dilated near the top; anticous lip 3-fid; posticous lip 2-fid, 
emarginate or entire, within in the bud. Stamens 2; anthers 1-celled, 
muticous ; pollen ellipsoid, longitudinally banded, bands and stopples 
usually 3. Style filiform, shortly and equally 2-fid at the tip; ovary 
glabrous or somewhat hairy upwards, with 2-1 ovules in each cell. 
Capsule small, stalked, 4- or 2-seeded; seeds smooth or pustular- 
tubercled.—Herbs or shrubs. Leaves entire, wavy, or (in H. mcro- 
phylla) obscurely toothed. Inflorescences axillary and terminal, or 
running into terminal spikes or panicles. Spikelets in cymes, elongate 
or subeapitate ; floral leaves resembling reduced vegetative leaves often 
present; spikelets with two bracts, lower containing a flower, upper 
empty or with a rudimentary flower; the 2 bracts free or connate 
1_2 their length; bracteoles to the lower bract 2, shorter than 1t, 
oblong ; bracteoles to the upper bract usually 0. 
Species 60, extending from Africa to Australia. 
*APOLYTON.—Two opposite bracts to the spikelet free, 
equal, or somewhat unequal. 
Two bracts of the spikelet with long linear green points 
(sometimes not very long in H. cancellata). 
Seeds smooth. 
Heads subglobose, chiefly axillary. 
Leaves 1} in. long . . . 
Leaves 2—4 in, long . 
Leaves 6 in. long, glabrate . . . 
Heads subglobose, many subterminal approximate 
Inflorescences elongate, lax . . . 
Seeds tubercled ; heads dense, oblong, compound 
Two opposite bracts of spikelet obtuse or acute, scarcely 
mucronate. 
. A. aristata. 
H. antennifeia. 
H. insularis. 
H. Staudtii. 
H. Barteri. 
. HI. cancellata. 
DWewNW 
