Thesium. | CXX. SANTALACEH (BAKER AND HILL): 429 
Mozamb. Distr. German East Africa: Unyika in Miwaira, 5500 ft., Goetze, 
1377! 
According to Engler’s description the perianth-segments are hairy on the margins, 
but this was not found to be the case in the specimens examined. 
Aspecimen collected by the Rev. F. A. Rogers (8504)'at Chilanga, N.W. Rhodesia, 
is closely allied to, and may be identical with, Z. unyikense, but it shows some 
difference in its globose fruits. It is also similar to 7. ¢riste from Angola, but differs 
particularly in the ciliate leaf-margins. 
45. T. tetragonum, A. W. Hill in Kew Bulletin, 1910, 237. A 
perennial with erect stems 6—7 in. high; stems more or less square in 
section, not markedly grooved, glabrous. Leaves near the base of the 
stems triangular-ovate acute brown scales 14 lin. long, passing into 
the ovate-lanceolate acute glabrous bracts 1-1} lin. long. Flowers 
borne in short irregularly cymose inflorescences in the axils of the 
bracts; main peduncle leafless, 4-3 in. long; bracteoles forming a small 
involucre to the flower. Perianth 14—1} lin. long; lobes $-2 lin. long, 
ovate-lanceolate, hooded, margins inflexed, membranous, slightly 
papillose, bearing a few hairs at the level of the anthers, Anthers 
almost sessile, } lin. long. Style % lin. long. Fruit 1} lin. long, 1} 
lin. broad, globose-ovoid, with 10 or more thick prominent main ribs, 
the intermediate ribs being often divided. ; 
Lower Guinea. Angola: Gossweiler, 42094! 
46. T. triste, 4. W. Hill in Kew Bulletin, 1910, 238. Perennial 
shrublet ; rootstock woody; stems erect, wiry, glabrous, covered at the 
base with densely imbricate scale-leaves; scale-leaves broadly ovate, 
acute, with membranous edges; stems deeply grooved, 7-10 in. long, 
green, bearing short axillary inflorescences. Leaves ovate-lanceolate, 
acute, 2-3 lin. long, spreading. Flowers borne singly on naked 
axillary peduncles, 1-14 in. long, to which the leafy bracts are slightly 
adnate; sometimes on axillary inflorescences from axils of bracteoles ; 
bracteoles 3-4, forming small floral involucre, 1-14 lin. long. Perianth 
green outside, whitish within, 13 lin. long; lobes { lin. Jong, ovate- 
lanceolate, slightly hooded, glabrous. Filaments } lin. long; anthers 
§- lin. long. Style 1} lin. long. Fruit unknown. 
Lower Guinea. Angola: Mndobua forest, near Malange, Gossweiler, 1114! 
In a note to the specimens Gossweiler says that stems and branches are apparently 
deciduous. 
47. T. doloense, Pilger in Engl. Jahrb. xl. 58. Subshrub, turning 
black on drying; stem slender, erect, smooth, subterete, sulcate, 1 ft. 
high, unbranched below ; branches scarcely or but little branched, spread-, 
ing or erect-spreading, short, 1-2 in. long, distant, bearing short strongly 
curved side twigs ending in a flower. Leaves 3-4} lin. long, narrowly 
subulate, somewhat thick, with colourless acuminate apex. Flowers 
terminal on compressed linear-lanceolate scale-bearing branchlets dis- 
tantly placed on the stems; scale-leaves narrow, tubular, urceolate ; 
bracteoles acuminate. Perianth 3 lin. long ; lobes ovate-lanceolate, acute, 
