230 xcviii. ACANTHACEJE (clarke). [Isoglossa. 



irile Ziand. British East Africa : Leikipia, 6500 ft., Hohnel. 



There is not one word of description given to this variety by Schweinfurth. 



4. I. membranacea, C. B. Clarke. Leaves 7 by 2J in., much 

 tapering at either end, membranous; petiole 1-2 J in. long. Calyx 

 ■i- in. long; otherwise as 7. laxa. 



Mozamb. I>lst. British Central Africa : Nyasaland ; Masuka Plateau, 6500- 

 7000 ft., Whyte ! 



The calyx is about half the length of I. laxa, the corolla is somewhat smaller. 

 The large very thin leaves may be due principally to a shady moist habitat. 



5. I, lactea^ Lindau in Engl. Jahrh. xx. 55. Leaves up to 4 by 

 If in., ovate, narrowed at either end, nearly glabrous; petiole up to 

 l| in. long. Peduncles axillary and subterminal, slender, bearing a 

 lax nearly glabrous panicle 1-3 in. long; bracts yV in. long, linear. 

 Calyx ^-J in. long, divided nearly to the base ; segments linear, sub- 

 equal, minutely scabrous-hairy. Corolla exceeding J in. long, cream- 

 white (or violet in the form /. violacea), nearly glabrous ; tube shorter than 

 the lips. Filaments glabrous, or in Lindau's figure ciliate on one side ; 

 anther-cells muticous, one below the other ; pollen lenticular, with one 

 stopple on each face. Pistil glabrous. Capsule J in. long, stalked, 4- 

 seeded ; seeds tubercular-scabrous. — Lindau in Engl. & Prantl, Pflan- 

 zenfam. iv. 3 B. 344, fig. 107, B, and in Engl. Pfl. Ost-Afr. C. 372. 

 /. Jiava, Lindau in Engl. Jahrb. xxii. 125. /. violacea, Lindau in 

 Engl. Jahrb. xxii. 125. 



Wile Z.and. British East Africa: Toru; Kivata, 8000 ft., Scott-Elliot, 

 7664! 



Mozamb. Dlst. German East Africa : Usambara : Nguelo, Solst, 2,212 ! 

 Lutindi, Hoist, 3252 ! Uluguru, 3300-5500 ft., Stuhlmann, 9032 ! 8S22 ! 



Lindau says the corolla-tube in /. violacea is only y^ in. long ; it appears to me 

 scarcely shorter than in I. lactea. Scott-Elliot's 7664 has a few scattered hairs on 

 the upper surface of the leaves. 



6. I. Volkensii, Lindauin Engl. Jahrh. xx. 55. Leaves 4 by 1 J in., 

 elliptic, acuminate at either end, glabrous. Flowers laxly panicled, 

 clear rose colour; bracts very small. Calyx J in. long, finely hairy. 

 Corolla-tube more than J in. long ; lips § in. long, rather broad. Capsule 

 J in. long, 4-seeded ; otherwise as /. lactea. — Lindau in Engl. & Prantl, 

 Pflanzenfam. iv. 3 B. 344, and in Engl. Pfl. Ost-Afr. C. 372. 



Mozamb. Dlst. German East Africa : Kilimanjaro, 8000 ft., Volkens, 990 ! 



7. I. parvifolia, Rendle in Journ. Bot. 1896. 411. Branches 

 18 in. long, slender. Leaves f by J in., ovate, pubescent on the nerves 

 beneath ; petiole J in. long. Panicle small, few-flowered, very lax. 

 Sepals J in. long, linear, scabrous. Corolla j in. long. One anther- 

 cell below the other, distant from the other, both muticous. Capsule 

 3 by y\ in., narrowly oblong, 4-seeded ; seeds rough, glabrous. 



