A Grammatical Dictionary of Botanical Latin

subtus (adv.): below, beneath, underneath, in a lower place; (with verbs of motion) to the underside; cf. intus (adv.) 'on the inside, within'; cf. extus (adv.): 'outside, on the outside;' ' cf. infra (adv. and prep. with acc.): on the under side, beneath, below, under;

- [lichen] thallus subtus dense albido-rhizinosus, rhizinis haud longis (Nyl.), the thallus on the underside densely whitish-rhizinose, with the rhizenes not long.

Cf. [lichen] thallus infra quoque valde inaequalis umbilico rhizineo mediocri vel latiusculo (Nyl.), the thallus underneath also very uneven with a rhizineous, medium or slightly broad umbilicus.

- fronde anguste lineari siccitate arcte convoluta subtus carinata squamosa, with the frond narrowly linear when dry narrowly convolute, underneath carinate squamose.

- nervis supra obsoletis vel nullis subtus prominulis reticulato-anastomosantibus, areolis minutis, with nerves on the upper side inconspicuous or lacking on the lower side standing out slightly and reticulately joining together, the enclosed areas minute (Stearn).

- folia subtus praeter venas virides satis rubra, leaves below (i.e. on the under side) except for the green veins quite red (Stearn).

- laminis supra puberulentis, subtus minus pubescentibus, with the blades above puberulent, underneath less pubescent.

- nervo supra profunde impresso, subtus valde prominente, with the nerve above deeply impressed, below, strongly prominent.

NOTE: subtus (adv.) is usually contrasted with supra (adv. & prep. + acc.), q.v., on the upper side, above, beyond, over; up;’ also superne (adv.), above, on the upper side;

- nervis supra nullis subtus prominulis, with nerves on the upper side none, on the lower side somewhat prominent.

- foliis pinnati-sectis subtus velutinis, superne glabris (DeCandolle), with the leaves pinnatisect, underneath velvety, on the upper surface glabrous.