Buellia.] xcviii. acanthace/e (clarke). 4D 



softly hairy; bract J in. long, ovate; bracteoles ^^ in. long, spathulate- 

 oblong. Calyx f-J in. long, 5-parted nearly to the base, 2-lipped ; 

 2 segments of anticous lip narrow oblong obtuse, middle segment of 

 posticous lip twice as broad, elliptic, two innermost segments linear, all 

 segments nearly equal in length. Corolla exceeding 1 in. long ; linear- 

 cylindric portion of the tube nearly -J in. long; lobes 5, subequal, short, 

 contorted in bud. Stamens, anthers, ovary, style, as of the genus ; 

 pollen globose, deeply honeycombed. Ovary glabrous except the tip. 

 Capsule i- in. long, oblong-cylindric, about 12-seeded; seeds at nearly 

 subequal distances, from the base of the capsule, small, discoid, glabrous 

 on the faces, very shaggy on the margins with hairs that spring out 

 elastically on being wetted. 



Jto-wer Guinea. Angola : Mossamedes, Wehvitsck, 5033 ! 5042 ! 



A remarkable species, differing in habit and character from any other Old World 

 RuelUa. Lindau (in Engl. & Prantl, Pflanzenf. iv. 3B. 301) doubts as to the genus 

 under which it should be placed. 



15. R. Marlothii, Engl, in Engl. Jahrh. x. 257 and xix. 151. 

 Branches shrubby, 4-angular, pubescent upwards. Leaves 1 by | in., 

 ovate, undulate, subobtuse, both faces stel lately softly white hairy, 

 petiole xV~6 ^^' ^^^§- Inflorescence few-flowered, axillary, with stellate 

 hairs nearly concealed by numerous long simple few-jointed white hairs ; 

 bract ovate, small. Calyx ^ in. long, 5-parted nearly to the base, 

 2-lipped ; segments linear, slightly widened at the obtuse tip, middle 

 segment of posticous lip twice as wide, a little longer than the other 

 segments. Corolla 1 in. long, orange (fide Engler) ; tube inflated from 

 near the base, curved; lobes 5, elliptic, subequal. Pistil and stamens 

 of the genus; pollen globose, honeycombed. Capsule J by -^^ in. 

 parallel-sided, glabrous ; 16 -seeded from the base. — Lindau in Engl. tS: 

 Prantl, Pflanzenf. iv. 3B. 310. 



Iiower Guinea. German South- West Africa: Hereroland ; Usakos, 3000 ft.. 

 Marloth, 1434! Dammaraland ; Swakop, Guei'ich, 104! 



9. ENDOSIPHON, Benth. ; Benth. et Hook. f. Gen. PI. ii. 1085. 



Corolla-tube long, linear-cylindric ; upper inflated part linear- 

 cylindric, hardly J in. in diam. ; anthers included deep in the corolla - 

 tube. — Leaves in often-unequal pairs, oblique and unequal at the base ; 

 margin entire. Otherwise as Ruellia : inflorescence as in R. amahilis, 

 S. Moore, and its allies. 



Species 2, endemic in West Tropical Africa. 



Calyx-segments |-1 in. long ; corolla-tube 1-1^ in. long . 1. E. primulouhs. 

 Calyx segments 1-1^ in. long ; corolla- tube 2 in. long . 2. E. obUqmis. 



1. E. primuloides, Benth. in Benth. <L- Hook. f. Gen. PL ii. 1086. 

 Small shrub ; stems 1-2 ft. high, nearly simple, with spreading hairs. 

 Leaves up to 3 J by Ij in., narrow-elliptic, narrowed at both ends, softly 

 thinly hairy, tip acute, margin entire wavy; cystoliths numerous-, 

 slender, prominent; petioles \ in. long, base of leaf often unequal, one 



