A Grammatical Dictionary of Botanical Latin

convexus,-a,-um (adj.A): convex, curved outwards; "In class. Latin both convexus and concavus were used in the sense of 'vaulted, arched, curved'" (Stearn, 1983); “having a more or less rounded surface” (Jackson); (hepatics) “curved outwards like the exterior of a circle; swollen as on the abaxial surface of a male bract, or the profile of a cell” (Paton); (fungi) “(of a pileus) regularly rounded; broadly obtuse” (S&D); “curved or rounded as the exterior of a s pherical surface of spherical or circular form; arched up: bulging out” (WIII); sometimes the convexity of a structure is so elevated as to be called ‘conic' [> L. convexus,-a,-um (adj.A): “curving outwards, arching, convex” (Glare)]; opp. concavus.-a,-um (adj.A), q.v.

convex: the upper face convex, the lower face concave; forming a rounded surface (S.Gray).

concave: the upper face concave, the lower face convex (S.Gray).

Convexum,-i (s.n.II), abl.sg. convexo: “an arch, vault, dome (esp. that of the sky hollowed, sunken, concave” (Glare).

lentiformis,-e (adj.B), lenticular, rotundato-compressum: convex on both sides, with a sharp edge (S. Gray).

convexiusculus,-a,-um (adj.A): somewhat convex.

- pileo convexo-hemisphaerico, with the pileus convex-hemispherical.

- semina in loculis solitaria, lenticulari-compressa, septo parallela, dorso convexiuscula, facie leviter concava (B&H), seeds solitary in the locules, lenticular-compressed, parallel to the septum, on the back somewhat convex, on the face lightly concave.

- [fungi] peridia majuscula, orbicularia, horizontaliter valde compressa, in pilei formam (supra convexam, subtus concavam) circumcirca regularissime curvata (S&A), the peridia somewhat large, orbicular, horizontally strongly compressed, into the shape of a pileus (above convex, below concave) all around extremely uniformly curved.

convex on both sides: biconvexus,-a,-um (adj.A); cf. lenticularis,-e (adj.B), lentiformis,-e (adj.B): lenticular, lentiform, lens-shaped, i.e. resembling a double convex lens.

slightly convex: plano-convexus,-a,-um (adj.A), flat-, or evenly-convex, not elevated in the center.

“The common Receptacle, (receptaculum commune), is of wide circumference, and contains a multitude of flowers. It is of the following kinds:

convex, (receptaculum convexum), that is somewhat elevated in the centere;

conical, (receptaculum conicum), that rises in the center into a high round point; (Willdenow); see receptacle.

convex-expanded (fungi) “(of the pileus) changing during growth from convex and tending toward plane [i.e. flat], the margin often remaining decurved” (S&D): convexo-expansus,-a,-um (part.A).

convex-plane: convex on one side, or at one time, flat on the other, or at a different time (fungi) “(of the pileus) changing from convex when young to flat when expanded” (S&D): convexo-planus,-i,-um (adj.A) [> L. planus,-a,-um (adj.A), even, flat, level, plane].

- [Subularia repens Quillwort; Brassicaceae] “Subularia repens, foliis convexo-planis. The creeping Subularia, with Leafes flat on the inside and round on the other” [i.e. with leaves convex-flat] (Dill.).