Erectum, ferum ad 14 cm. altum, papillis vix visis, sub lente tamen, in setam minutissimam productis, itaque partibus berbaceis subvelutinis; radix caulisque crassi, ad 5 cm. diam.; rami primarii ad 2.5 cm. diam., hornotini culti saepe 12 cm. longi, ad 3 mm. diam., internodiis 0.5-2 cm. longis; folia primaria mox subpatentia, deinde reflexa, supra sulcata, obtuse carinata, lateraliter compressa, lateribus plants, lat. visa superne haud, vel leviter, angustata, obtusa vel oblique obtusa, apiculo nullo vel inconspicuo, sordide viridia, saepius ad 3 cm. longa, 3 mm. lata, 4-5 mm. diam., vagina 1 mm. longa, pauca breviora crassioraque basi ramulorum interdum addita; flores solitarii vel demum 3-nati, laterales tardissime evoluti, diurni; pedunculi 3-6 mm. longi; receptaculum obconicum, apice cum basi sepalorum conspicue 5-gibbosum, gibbis sub-translucentibus, ad 4 mm. longum, ad 7 mm. diam.; sepala 5, exteriora lateraliter compressa, 8 mm., vel in flore postea producto acuta, ad 1.1 cm., longa, interiora 4-5 mm.; petala 3-4-seriata, roseo purpurea, exteriora obtusa vel emarginata, interne leviter angustata, interiora acuminata, in staminodia transeuntia, 0.7-1 cm. longa, ad 1.25 mm. lata; staminodia diu erecta, albida, ad 6 mm. longa; filamenta conferta alba, ad 5 mm. longa, intima parum supra basin papillata, antheris stramineis; glandulae saturate virides crenulatae, distantes sed tamen cum pseudoglandulis minoribus pallidis conjuncta; ovarium circa marginem planum, medium versus lobis approximatis subcompressis, ad per 1 mm. elevatis; stigmata 5-6, subulata, 2-2.5 mm. longa; capsula 4 cm. longa, 7 mm., expansa 1.2 cm., diam., per 1.5 mm. elevata, lobis interdum compressis, alis tegentibus angustis.
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Partes herbaceae plus minusve pubescentes, pilis patentibus; petala alba.