216 CXVIII. THYMELEZACEH (PEARSON), [Struthiola. 
very densely clothed with silvery hairs. Leaves crowded in the upper 
part of the stem, sessile, ovate, coriaceous, with a hard very acute apex, 
silvery-ciliate on the margin, otherwise glabrous, 2-3 lin. long, 1 lin. 
broad. Flowers white, much longer than the leaves. Bracteoles 2, 
ovate, 1 lin. long. Calyx-tube very slender; lobes ovate-lanceolate, 
very acute, quite glabrous, about 4 as long as the tube. Petals very 
small, divided to the base; segments thick.—Gilg in Engl. Jahrb. 
xxiii. 203. 
Mozamb. Distr. German East Africa: Uluguru Mountains at Lukwangula, 
Stuhlmann, 9157. 
2. GNIDIA, Linn.; Benth. et Hook. f. Gen. PI. iii. 197. 
Flowers hermaphrodite. Perianth-tube cylindric, sometimes square 
in section, articulated, and at length breaking across above the level of 
the ovary; lobes 4. Petals alternating with the calyx-lobes, entire or 
more or less deeply divided, or obscure. Stamens 8, in two whorls in the 
throat of the calyx-tube, the upper, or all, shortly exserted ; filaments 
very short; anthers oblong or linear. Hypogynous disc 0 or in the 
form of a minute ring. Ovary sessile, 1-celled; style filiform; stigma 
capitate. Fruit small, dry, enclosed in the persistent base of the calyx- 
tube; pericarp membranous. Testa of the seed brittle; endosperm 
usually scanty or 0, rarely abundant and fleshy ; cotyledons stout.— 
Branched virgate or ericoid shrubs. Leaves usually small and narrow, 
opposite or scattered. Flowers white, yellow, crimson or violet, usually 
in terminal (rarely axillary) involucrate or naked heads, rarely solitary 
in the leaf-axils. 
Species about 90, all in Tropical and South Africa. 
*Calyx-tube entirely glabrous. 
Involucral bracts acute ; calyx-tube 5 lin. long . 1. G. leiantha. 
Involucral bracts rounded; calyx-tube not more 
than 4lin, long. ~ : é . 2. G. macrorrhiza. 
**Calyx-tube glabrous below the articulation. 
Calyx-tube glabrescent or puberulous above the 
articulation. 
Unbranched or little branched shrubs 6-12 in. 
high. 
Stems simple . $ : ‘ : . 3. G. Mittuorum. 
Stems branched. 
Leaves and bracts obtuse or subacute . 4&4 G. huillensis. 
Leaves and bracts strongly acute. . . 5. G. Thomsoni, 
Little-branched shrub, 1-8 ft.; flowers vermilion 
* or scarlet 9 ‘ . z : . 6. G. Welwitschit. 
Tall, i a icipee is shrubs ; flowers orange or 
pink, 
Flowering branches long, weak, and nodding . 7. G@. Schweinfurthit. 
Flowering branches erect or suberect . . 8. G. Buchananit. 
Calyx-tube pubescent or villous above the articula- 
tion. 
Bracts green, herbaceous . = A . 9 G. mollis. 
