138 XOVIII. ACANTHACEE (CLARKE). [ Vewracanthus. 
2. N. decorus, §. Moore in Journ. Bot. 1880, 307. Branchlets 
fulvous-scabrous. Leaves up to 4 by 1 in., oblong-elliptic, entire, 
fulvous-scabrous on the nerves beneath ; cystoliths on both faces; 
petiole 0-1 in. long. Spikes terminal on axillary branches, 2 by # in., 
rather densely strobilate, fulvous-hairy; bract 4-3 in. long, ovate, 
subacute. Calyx }-} in. long, in 2 pieces, densely fulvous-hairy ; 
anticous segment divided 2 its length into 2 lanceolate teeth ; posticous 
segment divided 2 its length into 3 lanceolate teeth. Pollen globose, 
smooth, without longitudinal depressions. 
Lower Guinea. Angola: Loanda; between Lake Ivantala and Quilongues, 
Welwitsch, 5057 ! 
3. N. strobilinus, (. B. Clarke. Branches 6 in. long, simple, 
scabrous hairy. Leaves 3) by 13 in., obovate-elliptic, greenish-yellow, 
scabrous hairy on the nerves, tip obtuse or triangular-apiculate, base 
tapering; petiole 0. Spike terminal, sessile, 24 by } in., strobilate, 
very dense ; bract # in. long, ovate, acute, mucronate, 5-nerved, hairy. 
Calyx 4 in. long, anticous lip 2-fid half-way down, posticous 3-fid half- 
way down, hairy without and within. Pollen globose, smooth, without 
longitudinal depressions; stopples 3. Pistil 1-1 in. long; one style 
branch oblong, the other suppressed ; style-base subarticulated, sud- 
denly contracted above the ovary. Capsule } in. long, ellipsoid-oblong, 
compressed, sessile, glabrous, black, shining, 2-seeded; seeds covered 
with very slender hygroscopic hairs. 
Mozamb. Dist. British Central Africa: Nyasaland; Nyika Plateau, 5000- 
6000 ft., Whyte, 138! 
The corollas (with stamens) have all fallen, but from the very short styles were 
doubtless small. 
4. N. scaber, S. Moore in Journ. Bot. 1880, 307. Branches rather 
stout, pubescent. Leaves up to 3 by 1} in., ovate, entire, minutely 
scabrous on the nerves beneath ; cystoliths obscure; petiole 0—} 10. 
long. Inflorescence in dense axillary heads 1 in. in diam., made uP 
of condensed unilateral spikes, not (or only in fruit obscurely) strobi- 
late; bract 4-2 in. long, ovate, acute, hairy, mucronate, not spinous. 
Calyx 4 in. long, of two pieces, softly hairy; anticous piece divide 
more than half-way down into 2 lanceolate teeth ; posticous piece divided 
less than } way down into 3 short teeth. Pollen globose, smooth, 
without longitudinal depressions. Capsule 4 in. long, 2-seeded.— 
Lindau in Engl. & Prantl, Pflanzenfam. iv. 3 B. 315, fig. 108, B, 
and in Engl. Pfl. Ost-Afr. C. 369 partly. 
Lower Guinea. Angola: Loanda, Welwitsch, 5064! 5125! 5128! 5171! 
Mozamb. Dist. German East Africa: Kilimanjaro, 2000-3500 ft., Volkens, 
549! 2215! 
5. N. ukambensis, (’. B. Clarke. Branchlets very woody, with 
many-celled hairs. Leaves 2 by 1 in., acute at either end, subsessile, 
finally nearly glabrous except the many-celled hairs on the nerves 
beneath; main nerves 5 or 6 pairs. Heads % in. in diam., on very 
