A specie differt pedunculis gracilioribus, tioribus 1.4-2 cm. diam., receptaculi apice intumescente saepius 5-0 mm. diam. Planta erecta glabra, 17 cm. alta, basi foliosa, parum supra basin ramosa et norifera, apice 10 cm. diam.; rami ad 3 mm. diam., asperi papillis minutis, demum margaritaceis, internodiis 2-3 cm. longis; folia semi-teretia, supra inferno concava, papillis subnitentibus (sed tamen minus quam in D. cooperi); flores diurni, in cymas multi-ramosas dispositi, ramis ultimis subcongestis; pedunculi saepius 3-9 mm. longi, quasi in receptaculum intumescentem intrusi: petala 2-seriata nitenti-alba obtusa, apicem versus leviter ampliata, ad 1 mm. lata; staminodia alba, ad 0 mm. longa; ovarium supra medio conspicue 5-lobata; stigmata 2 mm. longa.
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