A Grammatical Dictionary of Botanical Latin

apetalus,-a,-um (adj.A): apetalous, without petals; ”having no petals. Also extended to plants that have neither calyx nor corolla;” (Lindley); cf. Apelta,-ae (s.f.I);

- flores pistillati apetali, pistillate flowers apetalous.

- genera contra normam apetala occurrunt (B&H), apetalous genera occur against the norm.

- flores dimorphi, alii perfecti, alii apetali oligandri in Helianthemis nonnullis et interdum in Lechea (B&H), flowers of two kinds, some perfect, others without petals, oligandrous in some Helianthemum [sc. species] and sometimes in Lechea.

- filamenta apice dilatata sunt in hac specie tam in floribus perfectis quam in apetalis.(B&H), the filaments are dilated at the apex in this species both in perfect flowers and in ones without petals.

- species pleraeque flores producunt dimorpbos, perfectos praecociores saepe steriles, aestívales minutos apétalos v. cryptopetalos fertiliores(B&H), many species produce flowers of two kinds, perfect early-flowering ones that are often sterile, summer (flowering ones) minute, without petals or cryptopetalous, more fertile.

NOTE: mutilous, mulilated, defective, imperfect: mutilus,-a,-um (adj.A), applied to a flower without the petals