A Grammatical Dictionary of Botanical Latin

Rosula,-ae (s.f.I), abl. sing. rosula, nom. pl. rosulae, abl. pl. rosulis: rosette, a ‘small rose;’ “a small Rose; a Rosette; a collection of spreading or clustered leaves or petals packed one over the other in many rows; as in double Roses, or the offsets of House-leek” [members of the Crassulaceae, esp. Sempervivum] (Lindley); “a cluster of leaves developed in crowded circles or spials from a crown either basally (as in a dandelion) or at the apex (as in many tropical palms)” (WIII); "The alternative form rosella,-ae (s.f.I) is rarely used" (Stearn); cf. coma;

- reproductio vegetativa in radicibus per rosulas adventitias minutas, vegetative reproduction on roots by minute adventitious rosettes.

- foliorum rosula sempervirens c. 10 cm. diametro; rosette of leaves evergreen c. 10 cm. across.

- caulis infra rosulam terminalem foliorum vivorum foliis mortuis vestitus, stem below terminal rosette of living leaves with dead leaves clothed (Stearn).

- rosulae anni praeteriti, rosettes of the past year; cf. annotinus, hornotinus (Stearn).

- folia basalia 3-5, alterna, non aggregata, rosulam non formantia, basal leaves 3-5, alternate, not aggregate, not forming a rosette.

- reproductio vegetativa in radicibus per rosulas adventitias minutas, vegetative reproduction on roots by minute adventitious rosettes.

- [moss] folia superiora in rosulam congesta (C.Muell.), the upper leaves crowded into a rosette.

- [moss] folia pallide olivacea, perichaetialia pauca in rosulam coarctatam congesta (C. Muell.), leaves pale olive, the perichaetial ones few, congested into a close-packed rosette.

Rosula,-ae (s.f.I), “(obsol.) little warts on the thallus of Lichens” (Lindley);

- (lichen) ad saxa calcarea, rosulis latit (Nyl.), on calcareous stones, hidden by rosulae [i.e. little warts].

Squamatio,-onis (s.f.III), abl. sg. squamatione: “a disease, consisting in a preternatural formation of rosettes of scale-shaped leaves; such as occasionally appears on the Rose-willow” (Lindley).