A Grammatical Dictionary of Botanical Latin

Substrate, substratum;(biology), the natural environment in which an organism lives, or the surface or medium on which an organism grows or is attached (Wikipedia);(in mycology) “the material on or in which a saprophyte is living” (Ainsworth & Bisby): substratum,-i (s.n.II), acc. sg. substratum, abl. sg. substrato, nom. & acc. pl. substrata;

- margine pilei in substrato affixa, with the margin of the pileus attached to the substrate.

- planta retinaculo irregulariter lobato substrato affixa, plant by an irregularly lobed holdfast affixed to the substrate.

- [OSCILLATORIA TORTA; algae] Caespes aut fluctuans, aut lapillis adnascens, biuncialis & ultra, atroviridis, substrato nullo limoso insidens (Agardh), the clump [i.e. bed] either undulating, or growing on pebbles, two inches and beyond, blackish-green, seated on no silty substrate.

Medium (culture): substratum nutriens (-entis, part.B); see medium (culture);

- mycelia ad substratum nutriens appressa, mycelia appressed to the medium (nutrient substrate) [note ‘nutriens’ = acc. neuter sg.].

Media pl. (culture): substrata nutricia (adj.A), in the plural, culture media.