Barle7'ia.'\ 



XCVIII. ACANTHACE^ (cLARKE). 



143 



iry 



leaf. 



linear beak ; ovary densely and minutely h 

 capsule minutely hairy or nearly glabrate. 

 Hairs simple, with some (especially on the 

 margins) attached by their centre. 

 Leaves sessile. 



Leaves oblong or linear-oblong . . . . 



Leaves ovate-elliptic ..... 



Leaves shortly petioled. 



Outer sepal truncate at the base 

 Outer sepal distinctly cordate . . . . 



Many glandular hairs ...... 



**Eu-Barlekia. — Ovary with, 2 similar ovules (or the 

 lower smaller) in each cell ; capsule (not known to 

 be rostrate) frequently perfecting 4 seeds. Hairs 

 simple or stellate, none canescent and attached by 

 their centre. (The capsule is not known in many 

 species below, and is sometimes 2-seeded, sometimes 

 4-seeded. In a large number of species the lower 

 ovule is smaller and the capsule probably 2-seeded. 

 On the other hand, the whole JB. repens group 

 (nos. 67-72) appear to be normally 4-seeded. This 

 variability is strongly against the admission of 

 Somalia as a j^enus.) 

 ■fOlabratce. — Mature leaves glabrate, or with small 

 bristles on the nerves. Flower* and leaves usually 

 large or medium (smaller in B. cyanea and B. 

 Lugardii). 

 Species of Lower Guinea (chiefly Welwitschian from 

 Angola), 

 Flowers clustered towards the ends of the branches. 

 Leaves ovate ; anticous calyx-segment 1 in. long 

 Leaves lanceolate ; aiiticous calyx-segment f in. 

 long. 

 Anticous calyx-segment 2-lobed 

 Anticous calyx-segment entire .... 

 Leaves spathulate-elliptic ..... 

 Lower flowers axillary. 



Leaves up to 5^ by 2 in. . 

 Leaves 1 by ^ in. 

 Species of East and South Tropical Africa. 



Leaves subsessile, almost truncate at the base. 

 Leaves oblong ; posticuus sepal 1^ in. long 

 Loaves elliptic; posticous sepal 1 in. long 

 Leaves petioled, narrowed at the base. 



Corolla-tube 2 in. long ..... 

 Corolla-tube ^ in. long ..... 

 Leaves scarcely petioled, narrowed at the base. 

 Corolla exceeding 1 in. in length. 



Leaves 3 by ^ in., linear-lanceolate 

 Leaves 2 by I in., elliptic .... 

 Corolla scarcely f in. in total length 



Y(Stellato-hirt(2. — Innovations (at least) stellately hairy. 

 Flowers in ovoid dense heads. 



Outer floral leaves broadly ovate, much imbricated. 



35. 

 36. 



37. 



38. 

 31K 



B. artjenten. 

 B. parvijiora. 



B. llochstetteri. 

 B. orbicularis. 

 B. glandulifera. 



