A Grammatical Dictionary of Botanical Latin

obtusus,-a,-um (part.A), compar. obtusior,-ius (adj.B), superl. obtusissimus,-a,-um (adj.A): “blunt, or rounded; thus ‘obtusely crenated’ is when crenatures are quite round, and not at all pointed; ‘obtusely cut,’ when incisions are blunt” (Lindley); obtuse, blunt, broadly pointed (more than 90*), occasionally meaning blunt or rounded at the end; obtuse, an apex at an angle of more than 90 degrees; “blunt or rounded at the end” (Fernald 1950); (bryology) “broadly pointed, more than [90 degrees] - used by some authors to mean blunt or rounded” (Magill 1990); (in fungi) “of pileus, cystidia, spores) rounded or blunt; greater than a right angle” (S&D) [> L. obtundo,-tudi, tusum 3, to make dull or blunt by striking;); opp. acutus,-a,-um (part.A), q.v.: acute, sharp-pointed, sharpened, made pointed, pointed, “terminating in a sharp or well-defined angle;” cf. truncatus,-a,-um (part.A);

- apex obtusissimus , subtruncatus (S&A), the apex very obtuse, almost truncate.

- lobis latis integris obtusissimis (DeCandolle), with the lobes broad, entire, completely blunt.

- lobulis subobtusis crassiasculis (DeCandolle), with the lobules nearly obtuse, somewhat thick.

- statura nana, flore erecto, sepalis obtusioribus (DeCandolle), with the stature diminutive [i.e. dwarf], with the flower erect, with the sepals more blunt.

- foliis radicalibus infimis oblongo [i.e. rounded-rectangular with parallel sides]- ovatis [oval, broader at the base], obtusis (Boissier), with the bottommost basal leaves oblong-ovate, obtuse.

- lobis obovatis cuneatisque obtusis (Boissier), with the lobes obovate and cuneate [i.e. wedge-shaped, with the point toward the base], obtuse.

- segmentis ovatis obtusis repando-dentatis (DeCandolle), with the segments ovate [i.e. broadest toward the base], obtuse, sinuose-dentate.

- sepalis 6-8 obtusissimis (DeCandolle), with the sepals 6-8, very obtuse.

- differt foliis ovalibus ovatisve obtusis (DeCandolle), it differs by the leaves oval [i.e. broadly elliptic] or ovate [egg-shaped, broadest toward the base], obtuse.

- involucrum campanulatum subbilobum obtusum (DeCandolle), the involucre campanulate, almost 2-lobed, blunt.

- petalis subspatulatis obtusis (DeCandolle), with the petals nearly spatulate, obtuse.

- sed segmentorum lobi paulo profundiores et omnes acuti nec obtusi (DeCandolle), but the lobes of the segments somewhat deeper and all acute, not obtuse.

obtusus cum acumine [with an acumen]: “terminating abruptly in a round end, the middle of which is suddenly lengthened into a point; scarcely different from cuspidate” (Lindley).

NOTE: retusus,-a,-um (part.A): retuse, i.e. with a rounded shallowly notched end at a broad apex, shallower than emarginatus,-a,-um (part.A), q.v.; same as depresso-truncatus,-a,-um (part.A) = retuse (Jackson).