A Grammatical Dictionary of Botanical Latin

ambiens, gen. sg. ambientis (reg. part.B), acc. sg. ambientem: surrounding, encircling, encompassing [> L. ambio,-ivi,-itum, 4. to surround, encompass, encircle, to go round]; syn. circumdans,-antis (part.B), cingens,-entis (part.B); see surrounding;

ambiunt: third-person plural present active indicative; they encircle, they surround;

- chloroplasti plerumque lumen cellulare ambientes, chloroplasts usually surrounding the cellular lumen.

- discus proprius, glandulosus; glandulis 5 germen ambientibus (Necker), the characteristic disc is full of glandules; with the glandules 5, surrounding the ovary.

- petala 4-5 dentibus calycinis alterna, disco ovarium ambiente extus inserta et ideo inter hypogyna et perigyna ambigua (DeCandolle), the petals alternate with the 4-5 calyx-teeth, with the disc surrounding the ovary on the outside and consequently ambiguous between hypogynous and perigynous.

- macula rosea vel dilute purpurea; peridia sparsa saepe eam subcircinatim ambeunt, mox curtato-conica, mox teretia (S&A), the spot rose-colored or pale purple; the peridia sparse, often nearly circinately surrounding them, soon shortened-conic, soon terete [i.e. rounded-cylindrical].

- [algae] fila illa minuta, quae frondem ambiunt, (Agardh), those filaments are minute which encircle the frond.

NOTE: this participle ultimately derived from the irregular verb ‘eo’ displays a regular part.B (i.e. the gen. sg. is not euntis, acc. sg. not euntem, etc.).