144 



xcviii. ACANTHACE^ (CLARKE). [I^arleria. i 



Floral leaves, thick, brown-red, viscid 

 Floral leaves white-ciliate .... 



Floral leaves ultimately papery .... 

 Outer rioral leaves elliptic, but little imbricated. 

 Leaves apiculate ; calyx ^ in. long 

 Leaves obtuse ; calyx ^ in. long 

 Flowers in short unilateral axillary cyines 



fff VilloscB. — Leaves when mature more or less hairy on the 

 surface, with no stellate nor centrally fixed hairs. 

 Cymes short, 3-1-flowered, approximated in the upper 

 axils, so as to form a terminal, more or less inter- 

 rupted spike. 

 Species of West Atrica. 



Dark green ; posticous sepal quadrate-oblong . 

 Very villous ; posticous sepal lanceolate . 

 Species of East or East Central Africa. 

 Posticou^ sepal quite entire. 



Yellow-green, strigose with tawny hairs 

 Dark green, mature leaves minutely hairy 

 Spikes strobiliform, softly grey-villous 

 Posticous sepal minutely toothed 

 Cymes not strobilate ; many of the few-flowered cymes 

 in distant axils, or on shortened lateral branches. 

 Corolla (in total length) ]l-2 in. 

 Species of West Africa. 



Flower-clusters axillary ; bracts nearly glabrate 



Flowers 3 or 4 subterminal ; bracts softly 



hairy ....... 



Species of East Africa. 



Leaves tapering at the base. 

 Leaves 4-6 in. long, subsessile. 



Leaves uniformly pale green beneath 

 Leaves strongly reticulated beneath 

 Leaves seldom up to l|-2 in. long, very 

 shortly petioled. 

 Posticous sepal f in. long, ovate 

 Posticous sepal 1 in. long, cordate . 

 Posticous sepal ~ in. long, ovate 

 Leaves rounded at the base, conspicuously 

 petioled ...... 



Corolla (in total length) f— |^ in. 

 Posticous sepal subentire. 



Leaves 1^ in. long, villous ; posticous sepal 



5 in- Jong 



Leaves ^-f in. long, villous ; posticous sepal 



\-k in- long 



Leaves 1:^ in. long, strigose ; posticous 



nearly ^ in., rounded 

 Posticous sepal toothed .... 



53. B. st ellato-tomentosa. 



54. B. stelligera. 



55. B. albostellata. 



56. B. salicifolia. 



57. B. Hildehrandtii. 



58. B. fulvostellata. 



61. 

 62. 

 63. 



64. 



B. opaca. 

 B. villosn. 



B. ventricosa, 

 B. Qrantii. 

 B, Limnogeton. 

 B. vix-dentata. 



1. B. Prionitis, Linn. Sp. Plant. 636. Glabrous or slightly- 

 hairy. Stems 1-8 ft. high. Leaves up to 7 by 2 in. (commonly 

 3J by 1 in.), elliptic, narrowed at both ends, entire, full of cystoliths ; 

 petiole 0-J in. long ; young and floral-leaves narrowed at the base, 



