Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
vē̆prēcŭla, ae, f. dim. [vepres], a little thorn- or brier-bush: illa ex vepreculis extracta nitedula, Cic. Sest. 33, 72.
Prov.: vipera est in vepreculā, there’s a viper in the bush, of a hidden danger, Pompon. ap. Non. 231, 13 (Com. Rel. v. 130 Rib.; cf.: latet anguis in herba).