A Grammatical Dictionary of Botanical Latin

vacillans,-antis (part.B): swinging to and fro, vacillating; “swinging as the anthers of Grasses, which swing lightly from the end of their filament” (Lindley); “variable” (Stearn 1996) [> L. vacillo,-avi,-atum, 1. to sway to and fro; to waddle, stagger, totter (as of a drunken person), vacillate]; cf. aestuans,-antis (moving to and fro), oscillans,-antis (swinging, oscillating), erraticus,-a,-um (wandering to and fro); labans,-antis (part.B), ‘tottering, beginning to give way, to collapse;’ versatilis,-e (adj.B), ‘turning freely on its support;’ see tottering;

- spermatia (spermatoconidia, androconidia), cellulae acrogenae tenerrimae, minimae, saepe motu vacillanti praeditae, steriles vel foecundantes (Braun), the spermatia (spermatoconidia, androconidia), very delicate acrogenous cells, very small, often provided with a vacillating [i.e. swinging to and fro] motion, sterile or fecundating.

Vaccinium vacillans 'vacillating.'