page 210
"flowers 1-7, the raceme axis elongate, straight or sligthly flexuous; pedicels erect, terete, up to twice as long as the bract.calyx lobes slightly unequal, externally papillose, convex, the margins not involute; upper lobe1-2mm long, circular, with apex emarginate. corolla 7-13mm long, pale to dark violet with a a yellow blotch at the base of the lower lip...upper lip constricted below the middle, the inferior part quadrate, the superior part ovate with the apex rounded, truncate or retuse...Utricularia mycrocalyx, wich I formely (Taylor 1964) treated as a variety of U. welwitschii can be distinguished from all related or similar species by the very small calyx lobes, wich do not have involute margins, and both of wich are usually apically emarginate. There is a considerale variation in overall inflorescenceand flower size in the relatively few collections seen." THE GENUS UTRICULARIA/Peter Taylor
Bon, et bien nous allons attendre sagement l'intervention du modérateur de la rubrique
histoire d'avoir son avis sur la question. 
Petite parenthèse enchantée: JJL présente la même fleur que Carniflora sous U.microcalyx, mystère et boulle de sphaigne
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