A Grammatical Dictionary of Botanical Latin

opaque, not transparent or translucent, impervious to light; “the reverse of shining; dull. Not the reverse of transparent” (Lindley); “dull; neither shining nor translucent” (Fernald 1950); shaded, shady, in the shade (opp. apricus,-a,-um (part.A); darkened, as if by shade: opacus,-a,-um (adj.A), impellucidus,-a,-um (adj.A), non translucidus,-a,-um (adj.A); cf. transparent; hygrophanus,-a,-um (adj.A), ‘hygrophanous, translucent when wet, opaque when dry’ (Stearn); see dull (of color);

- in opacis sylvaticis montium Carolinae (DeCandolle), in shaded forested places [sc. locis] of the mountains of Carolina.

- in sylvis opacis Americae bor. [borealis] (DeCandolle), in shady woods of North America.

- foliis opacis subcaruosis (DeCandolle), with leaves opaque, almost fleshy.

- (alga) genicula opaca, facile conspicua (Agardh), the genicula opaque, easily visible.

- (alga) siccata exhibet paginam opacam, plus minus atroviridem (Agardh), when dried it exhibits an opaque surface, more or less black-green.

- (moss) Paraphyses confervoidoae opacac gelatinosac (Mueller), the paraphyses like Conferva algae, opaque, gelatinous.

- (moss) ore membrana opaca rufobrunnea (Mueller), with the mouth with an opaque red-brown membrane.

- membrana e strato cellularum duplici conformata opaca et obscure rufescens (Mueller), the membrane formed from a double layer of cells, opaque and obscurely reddish.

- septo opaco; stylo brevi (B&H), with the septum opaque; with the style short.

- semina nunc laevia nitida, nunc opaca granulosa v. muricata, (B&H), the seeds sometimes smooth, shining, sometimes opaque, granulose or muricate.

- folia nunc coriacea et opaca, nunc tenuiora et lineis pellucidis longitudinalibus percursa (B&H), the leaves sometimes leathery and opaque, sometimes thinner and percurrent with longitudinal pellucid lines.

- testa crassa crustacea rugosa atra opaca (B&H), the seedcoat thick, crusty, rugose (dull) black, opaque.

- [moss] folia e cellulis parum mollioribus nunquam opacis sed amoene chlorophyllosis areolata, the leaves areolate with cells somewhat more delicate, never opaque [i.e. dull] but beautifully chlorophyllose.