A Grammatical Dictionary of Botanical Latin

Calyculus,-i (s.m.II), abl. sg. calyculo, nom. pl. calyculi, acc. pl. calyculos, dat. & abl.pl. calyculis: whorls of bracts below the calyx, epicalyx, “a partial involucre, containing but one, or perhaps two flowers. Also the external bracts of a capitulum, when they form a distinct ring or rings” (Lindley); (fungi) “(of Myxomycetes), a cup- or calyx-like structure at the base of the sporangium” (Ainsworth & Bisby) [> L. dim. calyx, a small flower-bud, the cup or calyx of a flower; the outer skin, hide of animals (Lewis & Short)].

Epicalyx, whorls of bracts below the calyx; “series of bracts close to and resembling the calyx” (Fernald 1950); cuplike structure at the base of the sporangium; “the involucellum, or external series of envelopes beyond the calyx, as in Malva” (Lindley): epicalyx,-ycis (s.m.III), q.v.

[Involucrum] basi bracteolatum (bracteolate at the base): “a term applied chiefly to the involucre of a Composite, when it is surrounded at the base by a distinct order of bracts” (Lindley).