218 XCVIII, ACANTHACEE (CLARKE). | Monechma. 
separable ; but this is no argument againt the value of pollen as a generic character, 
for the pollen in the 4 species is the same. 
11. M. lolioides, (. B. Clarke. Nearly glabrous, except the 
corolla; branches 12—20 in. long. Leaves from oblong (1? by 4 in.) to 
linear (24 by 4 in.), subobtuse, sessile. Spikes terminal, up to 5 by } in., 
loose, especially at the base, main rhachis glabrous; bracts 4 by 3’, in.; 
green with white margins, glabrous. Sepals 5, similar to the bracts 
but rather shorter. Corolla } in. long. Lower anther-cell long-tailed, 
tail clavate 2-lobed at tip; pollen ellipsoid, with 2 stopples. Style-base 
hairy; ovary glabrous. Capsule } in. long, 2-seeded, glabrous; the 
solid thick stalk scarcely ;; in. long; seeds yellow-brown, smooth, as 
of the genus, but with minute white hairs round the margins.— 
Justicia lolioides, 8. Moore in Journ. Bot. 1880, 310, t. 214, fig. 1. 
Lower Guinea. Angola: Pungo Andongo and Huilla, Welwitsch, 5090! 
5178! 5099! 
12. M. genistifolium, (. B. Clarke. Branches round, densely 
and minutely tomentose. Leaves up to 2 by 4 in., lanceolate, acute, 
mucronate, sessile, glabrous, yellow-green. Spikes up to 14 by 7 in., 
approximate towards the end of the branches; bracts 3 by | in., broad- 
lanceolate, acute, mucronate, glabrous. Sepals 5, 4 in. long, linear, 
puberulous. Corolla 3 in. long, blue and white (Lindner). One anther- 
cell much below the other, with a long clavate tail sub-2-lobed at the 
tip; pollen ellipsoid, banded, with 2 stopples. Ovary minutely pubescent 
in the upper half. Capsule nearly } in. long, pubescent, 2-seeded ; the 
solid broad stalk } in. long; seeds smooth, with acute margin.—/usticia 
genistifolia, Engl. in Engl. Jahrb. x. 264; Lindau in Engl. & Prantl, 
Pflanzenfam. iv. 3 B. 349. 
Lower Guinea. German South-west Africa: Hereroland, Luderitz, 96! 
Otyitambi, Belck, 9! Damaraland ; Karibib, 3000 ft., Marloth, 1424! Lindner! 
The bracts are simply shortened leaves, and should perhaps be described as floral 
eaves. 
15. M. arenicola, (. B. Clarke. Small shrub; viscous glandular- 
hairy; branches very thick, much ramified. Leaves 1 by }-} in., 
broad-lanceolate, acute, mucronate, subsessile, yellow-green, long-white- 
hairy, approximate. Flowers axillary, sessile. Sepals } in. long, linear, 
green. Corolla exceeding 3 in. in length. Style hairy at the base ; ovary 
minutely hairy in upper half. Capsule 4 in. long, 2-seeded, minutely 
hairy; the solid thick stalk } in. long.— Justicia arenicola, Engl. in 
Engl. Jahrb. x. 264; Lindau in Engl. Jahrb. xix. 151, and in Engl. & 
Prantl, Pflanzenfam. iv. 3 B. 349. 4/, Steingriverii, Schinz ex Lindau 
in Engl. & Prantl, Pflanzenfam. iv. 3 B. 349. 
Lower Guinea. German South-west Africa: Hereroland ; Usakos and Ubib, 
Marloth, 1247, 1445! Port Mine at Swakop River, Guerich, 105, and without pre- 
cise locality, Luderitz, 97! 
dd. M. Desertorum, (. /. Clarke. Annual, 5 in. high, white- 
hairy. Leaves } by 4 in., lanceolate, acute, mucronate, sessile, long- 
