A Grammatical Dictionary of Botanical Latin

arctus,-a,-um (adj.A), more seldom artus,-a,-um (adj.A); compar. ar(c)tior,-ius (adj.B); superl. ar(c)tissimus,-a,-um (adj.A): close, strait, narrow, confined, short, brief; scanty, brief, small; compressed, tightly fastened (together), close, close-packed, packed with, compact; abridged; diminished; strict, intense, profound; (of vegetation) dense, thick, crowded; cf. coarctatus,-a,-um (part.A): pressed together, close-set, squeezed in; (of darkness) thick;

- affinitate arcta, with a close relationship [i.e. affinity].

- caespites arti, the clumps thick [i.e. crowded].

- folia pariter variant, planiuscula v. margine arcto revoluta (B&H), the leaves vary evenly, somewhat flat or revolute with a tight margin.

- [fungi] circulus modo arctior, ac tum ostiola magis assurgunt (S&A), the circulus sometimes compressed, but then the ostioles are more assurgent.

- [fungus] peridiola paullatim inde in formam plerumque ovato-oblongam, ob situm arctum diversimode compressam, excrescunt (S&A), the peridioles from there gradually grow out into a usually ovate-oblong shape, due to the striated position compressed in different ways.

- [fungus] discrepat itaque a L. circumscissa statura duplo triplove majore, colore (praesertim pulveris), situ constanter arcto cellulari etc. (S&A), and so it differs from L. circumscissa by the size two or three times larger, by the color (especially of dust), by the structure constantly densely cellular, etc.

NOTE: in botanical Latin this word is usually replaced by ‘coarctatus,-a,-um’ (part.A), q.v. [cum + arctus], with generally the same meanings.

Artum,-i (s.n.II), abl.sg. arto: a narrow place or passage; a difficult or critical situation.

tenax,-acis (adj.B): tough, holding fast, tenacious; gripping, holding tight (or fast or hard); sticky, clinging, adhesive; persistent, firm, retentive.

tenaciter (adv.): closely, firmly, strongly, tightly, tenaciously [> L. tenax,-acis (adj.B): tough, holding fast];

- sepalis tenaciter ad fructum adhaerentibus, with the sepals tightly adhering to the fruit.