110 XCVIIl, ACANTHACEA (CLARKE). [ Sclerochiton. 
Posticous calyx-segment } in. wide; internodes 
short . . . . : . « . 6. 8. Holstii. 
Posticous calyx-segment with linear oblong obtuse tip, 8. S. obtusisepalus. 
Posticous calyx-segment ending in 2 lanceolate acute 
teeth . . . . . ° . . 7. S. scissisepalus. 
1. S. Kirkii, C. B. Clarke. Glabrous shrub. Leaves up to 
12} by 4 in., base decurrent to the foot of the petiole. Spikes terminal, 
2 in. long, 6—8-flowered ; peduncle } in. long; bract ? by 4 in., quadrate, 
shining, almost horny ; bracteoles 3 by 4 in., similar to bract. Calyx- 
segments 5 of equal length; posticous 1 by nearly } in., triangular- 
lanceolate, acute, shining, many-nerved; others much narrower. 
Corolla 14 in. long. Anthers long, hairy.—Acanthus Kirkii,T. Anders. 
in Journ. Linn. Soc. vii. 37; 8. Moore in Journ. Bot. 1880, 233; 
Lindau in Engl. Pfl. Ost-Afr. C. 370. 
Mozamb. Dist. Portuguese East Africa: Morambala Mountain, 2000 ft, 
Kirk! 
2. S. Preussii, (. B. Clarke. Leaves up to 9 by 34 in., base 
tapering into the petiole $-? in. long. Bract nearly 1 by } my 
quadrate, shining; bracteoles 1 by 4-4 in., quadrate-oblong. Calyx 
14 in. long (rather more in fruit), of 5 equally-long separate pieces; 
posticous segment nearly } in. broad, entire, shining, many-nerved ; 
others much narrower. Capsule ? by 4 in.—Pseudoblepharis Preusstt, 
Lindau in Engl. Jahrb. xx. 34, and in Engl. & Prantl, Pflanzenfam. iv. 
3B. 319, fig. 112, A, B. 
Upper Guinea. Cameroons: North-west Buea, Preuss, 1073! 
This is very near S. Kirkii, 
3. S. nitidus, C. B. Clarke. Nearly glabrous shrub. Leaves up 
to 8 by 24 in., narrowed at both ends; petiole 4-3 in. long. Spike 
34 by 1 in., terminal, subsessile; bracts 3 by } in., elliptic, acute, 
concave, minutely hairy, margins white-hairy ; bracteoles $ by } in. 
Calyx } in. long, of 5 separate pieces. Posticous segment elliptic, acute; 
others narrower. Corolla 1 in. long, light violet (8. Moore). Anthers 
long, hairy; pollen globose.—Acanthus nitidus, 8. Moore in Journ. 
Bot. 1880, 232. Pseudoblepharis nitida, Lindau in Engl. & Prantl, 
Pflanzenfam. iv. 3 B. 319. 
Lower Guinea. Angola: Pungo Adongo, Welwitsch, 5087! 5100! 
This plant recedes from the genus in the long spike with silky margins to 
the sepals. 
_ 4. S. Boivini, (. 2. Clarke. Glabrous, Branches thick, woody; 
with short nodes. Leaves 4 by 1 in., elliptic, narrowed at both ends; 
petiole } in. long. Spikes terminal on short lateral branches, short, 
few-flowered, or sometimes 3 in. long and 20-flowered ; bract } by 2 iD. 
elliptic ; bracteoles ? by } in., oblanceolate, subacute. Posticous calyX- 
segment 1} by } in., narrowly obovate, obtuse or emarginate, maDy- 
nerved; others 1 by } in., subacute. Corolla, hardly exceeding the 
