Rigida glabra, ca. 15 cm alta, caule lignoso incrassato, ad 1.5 cm diam., cuticula saturate brunnea, ramis rigidis tortuosis, 7-8 mm diam., ramulis ultimis gracilibus, ad 3.5 cm longis, 6-8-foliatis, foliis 2-4 tantum persistentibus; folia patentia, fere globosa, 6-9 mm longa, ad 6 mm diam., supra subplana, basi abrupte angustata distinctaque, pallide glauca pruinosa; flores 3-nati vel abortione saepe solitarii, vespertini (6-9.30 p.m.), ad 3 cm diam.; pedunculi 2-8 mm longi, cum aetate laterales late patentes indurati, bracteis prope apicem positis; receptaculum clavato-cyathiforme, ultra ovarium per 4 mm productum, apice leviter constrictum, 5 mm diam.; sepala 4, inter se inaequilonga, 2 foliis simillima, 4-6 mm longa, 2 anguste membranaceo-marginata, 3-4 mm longa; petala 4-seriata numerosa sed tamen sublaxa, anguste linearia, acuta vel acuminata, rarius subobtusa, laete rosea, intima pallidiora, extima subtus pulcherrime cuprea, 1.5 cm longa, vix ad 1 mm lata; stamina erecta vel leviter divergentia, staminodiis perpaucis patentibus, antheras abortivas ferentibus, ad 9 mm longa; ovarium supra alte elevatum, stigmatibus anguste subulatis, longe attenuatis, 5 mm longis.
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Succulent shrub, up to 300 mm tall. Leaves almost cylindrical, up to 10 x 6 mm. Flowers in dichasia, pink, sometimes suff used with copper, opening in aft ernoon, closing at dusk. Fruit 4-locular, lower part slender, upper part hemispherical to cubic, opening and closing repeatedly.
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