170 xcviii. ACANTHACE^ (clarke). [MonotheciuTii. 



Schweinf. Beitr. Fl. Aethiop. 112; Zarb, Cat. Spec. Bot. Pfund, 82; 

 Engl. Hochgebirgsfl. Trop. Afr. 81)2 ; Lindau in Engl. Jahrb. xviii. 

 08, t. 2, fig. 7S, and in Engl. & Prantl, Pflanzenfam. iv. 3 B. 840. 

 Rostellularia glandulosa, Nees in DC. Prod. xi. 878 ; A, Rich. Tent. 

 Fl. Abyss, ii. 153. Hypoestes Volkeiisii, Lindaii in Engl. Jahrb. xix. 

 Beibl. n. 47, 47, and in Engl. Pfl. Ost-Afr. C. 871. //. glandulosa, 

 Hochst. in Flora, 1848, 74. 



lO'ile Iiand. Eritrea : near Ginda, Schweinfurth Sf Riva, 2197! Abyssinia : 

 Mount Sholoda, near Adowa, Schimper, 346 ! near Mai Dogale, Schimper, 617 ! 

 Agow Dist., near Hellaka, 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 ! 



XlXozamb. Blst. Kilimanjaro, 3000-5000 ft., Volkens, 1580 ! 1607 ! 



2. TSL, aristatum, T. Anders, in Thwailes Enwni. PL Zeyl. 234. 

 Leaves when mature very sparsely hairy ; cystoliths plentiful on the 

 lower surface. Spikes 1-2 J 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. 201) ; C. B. Clarke in Hook. f. Fl. Brit. 

 Ind. iv. 524; S. Moore in Journ. Bot. 1880, 800; Lindau in Engl, k 

 Prantl, Pflanzenfam. iv. 8 B. 340. Jitsticia aristata, Nees in Wall. 

 PI. As. Bar. iii. 315. Anthocometes aristatus, Nees in DC. Prod, 

 xi. 312. 



Iio-wer Guinea. Angola: Golungo Alto, Welioitsch, 5155! 5197! 5198! 

 Caloniba, Welwitsch, 5134 ! 



Also found in South Madras and Ceylon. - 



4L ORE ACANTHUS, 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 J in. 

 long, posticous subentire, anticous 8-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. Ill, D, a b] as a typical example of " Guertel pollen." It is 

 drawn there globose (or short-ellipsoid with transverse ribs), smooth with the patches 

 round the stopples tubercular. I find the }iollen definitely ellipsoid (not globose), with 

 2 longitudinal smooth depressions in which the stopples are placed. In a 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. 



