by supplying dry tropical conditions and a sandy soil. Of 
these allies the most nearly related appears to be C. colum- 
naris, Linn. f., from which, however, C. Barklyi is readily 
distinguished by the characters mentioned by Mr. Brown. 
Descriprion.— Herb, succulent; stem 1—2 in. in height, 
simple or branching at the base, including the leaves 
3~3 in. thick at the base, slightly narrowing upwards and 
bluntly 4-angled throughout. Leaves opposite, decussate, 
closely imbricate, almost erect, connate at the base, the 
lower 2-3 lin. long, 6-7 lin. wide, gradually diminishing 
upwards, Flowers terminal, densely capitate, nearly sessile, 
Sepals linear-spathulate, obtuse, with finely ciliate margins 
but elsewhere glabrous. Corolla gamopetalous, deeply 
5-lobed, glabrous, in cultivated specimens white; tube 
about 1 lin. long; lobes 3 lin. long or longer, linear, 
obtuse, with recurved spreading tips. Stamens 5, included, 
attached to the mouth of the tube; filaments and oblong — 
anthers both very short. ypogynous scales very short, 
- erect, linear-cuneate, truncate or emarginate, channelled. 
Carpels 5, connate below, erect, strict, almost terete, hardly 
narrowed upwards. 
Fig. 1, a pair of leaves; 2, a flower; 3 and 4, stamens ; 5, carpels and hypo- 
gynous scales ; 6, a single hypogynous scale :—all enlarged, 
