234 CXVIII, THYMELEZACEZ (PEARSON). [ Lasiosiphon. 
5-merous, sessile on a villous club-shaped receptacle. Calyx-tube 
densely villous with long light fawn-coloured silky hairs below the 
articulation, tomentose above, 4-3 in. long; lobes broadly oblong or 
obovate, rounded, silky-villous outside, 14 lin. long, 1 lin. broad. 
Petals linear or oblong-linear, entire or more or less deeply bifid, very 
thin, about 2 as long as the calyx-lobes. Ovary densely villous with 
erect silky hairs; disc minute. Fruit not seen. 
Upper Guinea. Togo: Kirikiri, Kersting, 36! 
4, ARTHROSOLEN, C. A. Meyer; Benth, et Hook. f. Gen. PI. iii. 193. 
Flowers hermaphrodite. Calyx-tube cylindric, slender, articulated. 
and usually at length breaking across above the level of the ovary, 
glabrous below the articulation in the Tropical African species ; lobes. 
4, spreading, naked within at the throat. Petals 0. Stamens 8, in 
2 whorls, included, with short filaments; anthers oblong or linear. 
Hypogynous disc 0. Ovary subsessile, 1-celled ; style filiform; stigma 
small, capitate. Fruit small, dry, with a membranous pericarp, 
enclosed in the persistent base of the calyx-tube. Testa brittle; _ 
albumen scanty or 0; cotyledons fleshy.—Virgate or ericoid shrubs. 
Leaves usually small, narrow, opposite or alternate, crowded or distant. 
Flowers in usually involucrate spikes or heads, rarely solitary, axillary.. 
Species about 20, all in South and Tropical Africa. 
(See also Gnidia katangensis, Gilg & Dew., in which the petals are said to be 
usually absent.) 
Outer involucral scales linear or narrowly lanceolate . 1. A. chrysantha. 
Outer involucral scales broadly ovate or ovate- 
lanceolate. 
Calyx-tube finely pubescent above the articulation. 
Calyx-tube } in. long , 2. A. Pogget. 
Calyx-tube 4 in. long. : : - : 3. A. spherantha. 
Calyx-tube silky-villous above the articulation 4, A, Newtonit. 
Calyx-tube glabrous, glabrescent or sparsely puberu- 
lous above the articulation. 
Heads 30—40-flowered F : : : . 5. A, dekindtiana. 
Heads 5-6-flowered . : : : : . 6. A. pleurocephala. 
Calyx-tube pubescent or villous below the articu- 
lation. 
Involucral bracts distinctly shorter than the flowers 7. A. fulgens. 
Involucral bracts equalling or slightly exceeding 
the flowers . : : ; 
8. A. foliosa. 
1. A.chrysantha, Solms-Laub. ex Schweinfurth, Beitr. Fl, Aethiop. 
165. A shrub 3-2 ft. high, glabrous, glaucescent, with numerous erect: 
simple or little-branched stems arising from a woody rootstock. ‘Leaves 
scattered, erect, linear, acute, l-nerved, about 3? in. long. Heads: 
terminal, solitary, many-flowered; involucral bracts ovate (outer ones 
narrower), acuminate, glabrous, shorter than the flowers. Flowers 
