A perennial subshrub with prostrate woody stems ± 3-4 mm. diam., up to 3 dm. or more long; branches ∞, the plant forming extensive patches up to 6 dm. or more diam. Branchlets mainly opp., us. crowded, erect or ascending, completely invested by lvs, which are long-persistent in withered state. Lvs opp., ± translucent, succulent, green or flushed with red; the pairs completely fused to form a terete "joint" 5-6-(15) × 3-7 mm.; apex free, forming a "collar" with 2 minute lobes. Fls axillary, in upper portion of branchlets, forming a "spike" with shorter, thicker "joints"; the fls sunk in axils, 5-10-(15) in a ring. Per. fleshy, thickened, ± urceolate, with 3-5 minute teeth; stamens 1-2; style branches 2, stigmatic portion linear, minutely papillose. Fr. ± ovoid; seeds ± 2 mm. diam., with coriac. testa clad in minute hooked hairs.