244 xcviii. ACANTHACEiE (clarke). [Peristrophe. 



irile ]Land. Dar Fertit : at Dem Bekir, Schweinfurth, ser. 3, 23 ! Niamniam, 

 Schweinfurth, 2885 ! 



4. P. usta, C. B. Clarke. Dusky, pubescent. Branches 8-5 in. 

 long, very numerous, arising after a grtiss-fire from the woody rootstock. 

 Leaves up to 1 by J 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 J in. 

 long. Corolla J in. long, slender. Stamens 2; anther-cells 2, one 

 clearly above the other; pollen as of P. luteoviridis. Capsule f in. 

 long, slender, 4-seeded, the linear stalk exceeding J in. in length. — 

 Duvemoia pumila, Lindau in Engl. Jahrb. xx. 44, and in Engl. & 

 Prantl, Pflanzenfam. iv. 3 B. 3P><.), and in Engl. Pfl. Ost-Afr. C. 372. 



Mozamb. Blst. British Central Africa : Nya?aland ; 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 

 J-| 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. micro- 

 phylla) obscurely toothed. Inflorescences axillary and terminal, or 

 running into terminal spikes or panicles. Spikelets in c}Tnes, elongate 

 or subcapitate ; 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 

 J-| their length ; bracteol^s to the lower bract 2, shorter than it, 

 oblong ; bracteoles to the upper bract usually 0. 



Species 60, extending from Africa to Australia. 

 *Apoltton. — 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 \. H. aristata. 



Leaves 2-4 in. long 2. H. antennifera. 



Leaves 6 in. long, glabrate . . . . 3. -ff. insularis. 



Heads subglobose, many subterminal approximate 4. H. Staudtii. 



Inflorescences elongate, lax 5. JT. Barteri. 



Seeds tubercled ; heads dense, oblong, compound . 6. M. cancellafa. 

 Two opposite bracts of spikelet obtuse or acute, scarcely 

 mucronate. 



