84 ACANTHACE® (Clarke). — [hsoglossa. 
tridentata, E. Meyer in Drége, Zwei Pflanzengeogr. Documente, 150, 
196. Gendarussa tridentata, Presl, Bot. Bemerk. 95. Ramusia 
tridentata, Nees in DC. Prod. xi. 309; 7. Anders. in Journ. Linn. 
Soc. vii. 50. Peristrophe sp., Benth. in Benth. & Hook. f. Gen. 
Pi tis 4122. . 
EasTERN ReGion: Pondoland; St. Johns River, under 1000 ft., Drége! 
and without precise locality, Bachmann, 1283 ; Griqualand East ; Clydesdale, 
4000 ft., Tyson, 2142! Natal; near Durban, 200 ft., Wood, 7477! and without 
precise locality, Gueinzius! Gerrard, 1898! af 
A shrub 12-16 ft, high (Lindau), 
14. I. Cooperi (C. B. Clarke); branchlets, bracts and bracteoles 
viscid-hairy with gland-headed hairs; leaves up to 2 by % in.; 
corolla 11 in. long ; otherwise as I. hypoestiflora. 
EasteRgn Reoion: Griqualand Hast; Zuurberg Range, 4000 ft., Tyson, 
1774! Natal; Umgeni Falls. Cooper, 1183 ! 
This appears, from the stoutness of the branches in herbarium specimens, to 
be a large shrub like I. hypoestiflora ; the leaves are smaller, the bracts rather 
narrower, and the corolla rather smaller. 
XXVII. PERISTROPHE, Nees. 
Calyx small; segments 5, nearly separate, linear-lanceolate. 
Corolla medium-sized, pink ; tube linear, hardly widened upwards; 
lips 2, long, posticous narrow, subentire. Stamens 2; anther- 
cells 2, muticous, one much above the other; pollen oblong-ellipsoid, 
banded longitudinally. Style with 2 very short oblong branches. 
Capsule 4-seeded, on a cylindric stalk ; placentz not rising elastically 
from the capsule-base. Spikelets panicled, pedicelled, about 2-1 in, 
by 5 in, glabrous or minutely puberulous, containing usually 
1 perfect and 1 imperfect flower; bracts 2, rather longer than the 
. linear-lanceolate ; bracteoles to each flower 2, similar, rather 
shorter, 
Species 20 in the warmer regions of the Old World. 
This genus differs from Dicliptera only in that the placentze do not, in the ripe 
fruit, rise elastically from the base of the capsule valves. The 5 Cape species, 
here recorded, are easily separated from everything else, though perhaps they 
form only one large species. The Cape Ramusia, reduced to Peristrophe by 
Bentham, is here, as by Lindau, placed in Isoglossz, of which it has the watch- 
shaped pollen, 
Whole plant glabrate : . 
Panicles rather dense, interspersed with leaves ... (1) caulopsila. — 
Panicles very straggling, almost leafless... .. (2) bicalyculata. 
Panicles stout, rather dense, almost leafless ... (3) Hensii, 
Leaves persistently thinly hairy : 
Spikelets 4 in. long; corolla Zin. long... ... (4) cernua, 
Spikelets 4-4 in. long; corolla 1 in, long ... ... (5) natalensis. 
1. P. caulopsila (Presl, Bot. Bemerk. 95); glabrate; leaves 
(lower) attaining 13 by 2 in., elliptic, acuminate at either end; 
petiole up to } in. long, but all the upper leaves much smaller ; 
panicle 14 by 5 in., compound, dense with numerous pedicelled spike- 
