46 XCVIII. ACANTHACEE (CLARKE). [ Ruellia. 
Nile Land. Jur: Gir, Schweinfurth, 2155! Niamniam, Schweinfurth, 3754 ! 
This species appears very close to R. patula; the more pointed leaves and the 
absence of grey pubescence give it a different aspect. 
3. R. sudanica, Lindau in Engl. & Prantl, Pflanzenf. iv. 3B. 
310. Petiole 0-}in. long. Bracteoles ligulate, hardly spathulate-elliptic ; 
otherwise as R. patula.—Lindau in Engl. Pfl. Ost-Afr. C. 368. 2. 
ibbensis, Lindau in Engl. Jahrb. xx. 15, and in Engl. & Prantl, Pflanzenf. 
iv. 3B. 310. R. patula, var. subvillosa, S. Moore, MS. Duptera- 
canthus sudanicus, Schweinf. in Verh. Zool.-Bot. Gesell. Wien, xviii. 
679, partly. 
Wile Land. Abyssinia (ex Lindau). British East Africa: Ukamba; Kitui, 
Hildebrandt, 2727 ! 
Mozamb. Dist. Kilimanjaro: River Sigi, Volkens, 63! Usambara: Amboni, 
Holst, 2921 ! 
4, R. leucoderma, Lindau in Engl. Jahrb. xxiv. 318. Branches 
white, with many patent simple and gland-tipped hairs. Leaves up to 
1} by }in., oblong, subobtuse, hispid, sessile. Bracteoles 4 in. long, 
linear-oblong. Sepals 4 in. long, nearly free, linear, green, hairy. 
Corolla ? in. long. Ovary glabrous, except at tip. 
Nile Land. Somaliland: Abdalla, Keller, 217! 
5. R. placoidea. Rendle in Journ. Bot. 1896, 414. Very small 
herb. Leaves subsessile, ovate, }—? in. long, with round scales bearing 
tufts of bristles on both faces. Calyx scarcely } in. long, divided half- 
way down into 5 subequal teeth. Corolla ? in. long. 
Nile Land. Somaliland: Darro Mountains, Donaldson Smith ! 
6. R. prostrata, 7. Anders. in Journ. Linn. Soc. vii. 24. Leaves 
up to 3 by 1} in., elliptic-lanceolate, tip narrow-triangular often 
subacute. Calyx-teeth 4-} in. long, setaceous. Pollen larger than 
in R. patula, much more deeply honeycombed. Ovary hairy down to 
the base. Capsule ? in. long, pubescent all over (till very ripe), other- 
wise as 2. patula.—C. B. Clarke in Hook. f. Fl. Brit. Ind. iv. 411; 
Lindau in Engl. & Prantl, Pflanzenf. iv. 3B. 310, and in Engl. Pf. 
Ost-Afr. C. 368. R. bignonieflora, S. Moore in Journ. Bot. 1880, 198, 
partly. Dipterucanthus prostratus, Nees in Wall. Pl. As. Rar. iii. 81, 
and in DC, Prod. xi. 124. 
Nile Land. Abyssinia, Steudner, 1506! Somaliland: Goetton, Miss HE. Cole! 
British East Africa: Taita, Hildebrandt, 2426 ! 
Lower Guinea. Angola: Ambriz, Monteiro Loanda, Welwitsch, 5063 partly ! 
Mozamb. Dist. Portuguese East Africa: Lower Zambesi; between Sena and 
Lupata, Kirk! at the foot of Morambala Mountain, Kirk! Lower Shire Valley, Kirk! 
British Central Africa: Tanganyika Plateau, Carson! Nyasaland: Zomba, Whyte & 
McClounie ! Mount Sochi, Scott-Elliot, 8548! Shire Highlands, Buchanan, 133 ! and 
without precise locality, Buchanan, 320 ! 
The plant is here called 2. prostrata, T. Anders., as it is certainly his plants R. 
prostrata, Lam., is described with small calyx, and was therefore probably paula, 
as Beddome takes it. 
