A Grammatical Dictionary of Botanical Latin

marcidus,-a,-um (adj.A): withered, wasted, shrunk, decayed, shriveled; (fungi) “withering; withered; shrunken” (S&D) [> L. marceo,-ere 2., to wither, droop, shrivel, shrink; to be faint, weak]: same as marcescens,-entis (part.B): “not falling off until the part which bears it is perfected, but withering long before that time, as the flowers of Orobanche” (Lindley); withered, faded, enfeebled, wasted away, decayed, rotten; exhausted; faint, pale, dull; opposite of vegetus,-a,-um (part.A), q.v.; cf. emarcidus,-a,-um (adj.A), emarcescens,-entis (part.B), emarcid, shriveled up, withered up; disappeared, dwindled away; see withered;

- frequens in hortis eorumque rejectamentis folia calycesve Dianthi Caryophylli marcidos aut prorsus arefactos semiputres incolit (S&A), frequent in gardens, and on litter, it inhabits withered leaves, or the shrivelled [but attached] calyces of Dianthus Caryophyllus or entirely withered, half rotted ones.

NOTE: in some contexts, emardicus means ‘withered’ or dried up, as in a herbarium specimen; whereas marcidus usually means “withered and persistent;’ see emarcidus,-a,-um (adj.A).