176 XCVIII. ACANTHACEH (CLARKE). | Monotheciwm. 
Schweinf. Beitr. Fl. Aethiop. 112; Zarb, Cat. Spéc. Bot. Pfund, 32; 
Engl. Hochgebirgsfl. Trop. Afr. 392; Lindau in Engl. Jahrb, xviii. 
63, t. 2, fig. 78, and in Engl. & Prantl, Pflanzenfam. iv. 3 B. 340. 
Rostellularia glandulosa, Nees in DC. Prod. xi. 373; A. Rich. Tent. 
Fl. Abyss. ii. 153. Hypoestes Volkensii, Lindau in Engl. Jahrb. xix. 
Beibl. n. 47, 47, and in Engl. Pfl. Ost-Afr. C. 371. H. glandulosa, 
Hochst. in Flora, 1843, 74. 
Nile Land. Eritrea: near Ginda, Schweinfurth & Riva, 2197! Abyssinia: 
Mount Sholoda, near Adowa, Schimper, 346! near Mai Dogale, Schimper, 617! 
Agow Dist., near Bellaka, 6000-7000 ft., Schimper, 193! 2274! and without precise 
locality, Schimper, 753! 1156! British East Africa: east side of Lake Albert 
Edward, Scott-Elliot, 8068! and on rocks at Lake Elmeteita, 6000-7000 ft., Scott- 
Elliot, 6627 ! 
Mozamb, Dist. Kilimanjaro, 3000-5000 ft., Volkens, 1580! 1607 ! 
2. M. aristatum, 7. Anders. in Thwaites Enum. Pl. Zeyl. 234. 
Leaves when mature very sparsely hairy; cystoliths plentiful on the 
lower surface. Spikes 1-2} in. long, dense, often branched at the 
base ; outermost floral leaves linear or bristle-like ; bracts and bracteoles 
bristle-like, hairy, not viscid glandular; otherwise as M/. glandulosum. 
—Bedd. Ic. Pl. Ind. Or. t. 269; C. B. Clarke in Hook. f. Fl. Brit. 
Ind. iv. 524; S. Moore in Journ. Bot. 1880, 309; Lindau in Engl. & 
Prantl, Pflanzenfam. iv. 3 B. 340. Justicia aristata, Nees in Wall. 
Pl. As. Rar. iii, 315. Anthocometes aristatus, Nees in DC. Prod. 
xi. 312. 
Lower Guinea. Angola: Golungo Alto, Welwitsch, 5155! 5197! 5198 ! 
Calomba, Welwitsch, 5134 ! 
Also found in South Madras and Ceylon. 
41. OREACANTHUS, Benth. in Benth. et Hook. f. Gen. 
Pi. ii. 1104. 
Calyx small, divided to the base ; segments 5, equal, linear. Corolla 
small, 2-lipped; tube campanulate, hardly ;!, in. long; lips nearly fin. 
long, posticous subentire, anticous 3-lobed. Stamens 2; anthers long- 
exserted, 1-celled, muticous ; pollen ellipsoid, with 2 longitudinal smooth 
depressions. Ovary and style-base glabrous; branches of the style 2, 
minute, equal, oblong; ovules 2 in each cell. Capsule oblong, 4-seeded, 
lower part contracted ; seeds discoid, wrinkled, without hairs.—Shrub, 
up to 12 ft. high. Leaves entire. Panicle terminal, compound, lax, 
many-flowered, viscid-hairy ; bracts very small, linear. 
Species 1, endemic. 
The pollen of this plant is figured by Lindau [in Engl. & Prantl, Pflanzenfam. iv. 
3 B. 282, fig. 111, D, a bj as a typical example of “Guertel pollen.” It 
drawn there globose (or short-ellipsoid with transverse ribs), smooth with the patches 
round the stopples tubercular. I find the pollen definitely ellipsoid (not globose), with 
2 longitudinal smooth depressions in which the stopples are placed. Ina word, the 
pollen is that of Justicia diffusa (and many other small Justicias) ; but the genus 
should be Duvernoia, Lindau, if we depend on pollen alone for the genus. 
