154 xcviii. ACANTiiACE.E (clarke). [Barlerla. 



in. in diam, ; sterile bracts J in. long, altogether spinous pinnatifid ; 

 outer fertile bracts up to 1 by f in., ovate, acute, with many innocuous 

 teeth. Calyx § in. long ; posticous segment obovate-oblong, shaggy. 

 Corolla dark blue, more than 1 in. long. 



wrile Ziand. Eritrea : Keren, Steudner, 1508 : 



30. B. xnucronifolia, Lindau in Ann. Istit. Hot. Roma vi. [1890] 

 71. Branch woody, hairy. Leaves | by ;J in., triangular at either end, 

 hairy on both surfaces, tip with a hard spine ^'^ in. long. Spikes If by 

 1 J in., unilateral ; sterile bracts 1 in. long, reduced to pinnatifid spines ; 

 empty bracts to spike 1 in. long, lanceolate, spinous. Posticous sepal 

 1 by J-^ in., ovate, acute, spinescent, hairy. Corolla purple-blue, tube 

 1| in. long inflated near the top. 



Ifflle Ziand. Somaliland : Gonene, Riva, 1098 



31. B. hoxnoiotricha, C. B. Clarke. Canescent with many short 

 incurved white simple hairs. Leaves J by \ in., obovate-elliptic, tip 

 obtuse with a mucro, base narrowed; petiole 0-i in. long. Sterile 

 bracts up to J in. long, reduced to compound pinnatifid rigid spines; 

 raceme many-flowered, unilateral, dense ; fertile bracts f in. long, 

 elliptic-lanceolate, few-toothed. Posticous sepal | by ^ in., acute, 

 margin spine-toothed; anticous calyx-segment hardly J in. long, ovate, 

 obtuse, entire or nearly so. Corolla-tube \\ in. long, funnel-shaped at 

 the top. Filaments with scattered short white hairs nearly to the top. 

 Ovary glabrous ; ovules 2, subsimilar in each cell ; style glabrous, wdth 

 a veiy few microscopic hairs near the base. 



isrile Ziand. Somaliland, Miss Edith Cole ! Oillet Sf Aylmer ! 

 This is allied to B. mucronifot'a, Lindau, but has short uncurved grey (instead of 

 villous) hairs, and smaller tlowers. 



32. B. elegans, >S'. Moore in Journ. Bot. 1880, 2G0, excluding syn. 

 Hairs simple or obscurely clustered. Branches 2 ft. long. Leaves up 

 to 3 J, by 1/j in., quite entire, narrowed into a petiole 0-i in. long. 

 Racemes unilateral, 1-lJ in. long, 2-8-flowered ; fertile bracts \ by ^ 

 in., spine-toothed. Posticous sepal J in. long, elliptic, acute, spine- 

 toothed. Corolla blue-mauve; tube |-| in. long, narrowly funnel- 

 shaped ; lobes .\ in. long. Capsule J in. long, 4-seeded. — B. pungens, 

 var. macrophyllaj Nees in DC. Prod. xi. 237, not of Linn. 



ILower Guinea. Loango, Soyanx, 26 ! Angola, Weltvitsch, 5034 ! 5068 ! 

 5114! 5122! 5187! K\r\hv\z, Monteiro ! Huilla ; Yixxm^aidi, Johnston ! 



Also in South Africa. 



In this plant the cystnliths are sometimes conspicuous in the leaves, sometimes 

 altogether obscure. It is not easy to understand how Nees supposed it could b-,- a 

 var. of the Cape B. jmngeub-, Linn., which has small toothed leaves with a different 

 indumentum, and bears no superficial resemblance to B. elegans. 



33. B. carruthersiana, S. Moore in Journ. Bot. 1880, 270. 

 Strigose ; internodes 3^ in. long, or only IJ in. long. Leaves up to 6 J 



