A Grammatical Dictionary of Botanical Latin

Substrate, substratum, the base or natural environment on (as its surface) or in which an organism lives, such as the soil, rocks, water, tissues or other media; “a source of reactive material (such as a nutritive medium) as agar is used in culture developement” (after WIII); a base on which an organism is attached; in mycology) “the material on or in which a saprophyte is living” (Ainsworth & Bisby); (in mycology) “substratum,-i (s.n.II) “the material in or upon which a fungus grows or to which it is attached – sometimes used for ‘matrix’ (S&D): substratum,-i (s.n.II), acc. sg. substratum, abl. sg. substrato, nom. & acc. pl. substrata [> L. substernere, to strew under; cf. substratus,-us (s.m.IV): a spreading or laying under].

Matrix (in mycology) “the substrate on or in which a fungus grows [> L. matrix, breeding animal > mater, ‘mother’]” (S&D).

- 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) (Eng.noun): 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’ [nutricius,-a,-um (adj.A), q.v., nourishing].