A Grammatical Dictionary of Botanical Latin

-come,-es (s.f.I), abl.sg. –come: ‘-hair; -coma; -tuft’ (Gk. combining noun suffix); see –coma,.-ae (s.f.I);

NOTE: often Latin nouns ending in ‘a’ may also be transcribed in ‘e,’ becoming first declension Gk. Nouns ending in –e, -es (s.f.I).

singular

  Nom. -come (s.f.I)  Chrysocome        Anemone     
  Gen. -comes          Chrysocomes       Anemones
  Acc. -comen          Chrysocomen       Anemonen
  Dat. -comae          Chrysocomae       Anemonae
  Abl.  -come            Chrysocome        Anemone (after Stearn)

plural

  Nom. -comae (pl.f.I) Chrysocomae         Anemonae     
  Gen. -comarum        Chrysocomarum     Anemonarum
  Acc. -comas           Chrysocomas         Anemonas
  Dat. -comis            Chrysocomis          Anemonis
  Abl. -comis             Chrysocomis         Anemonis

As these are Greek noun suffixes, they combine with Greek prefixes: all feminine gender:

Argyrocome,-es; Chrysocome,-es; Dipterocome,-es, Pericome,-es.

Amphicome,-es (s.f.I), abl.sg. Amphicome: > Gk. amphi, around + come, hair; “in allusion to the structure of the seeds. Bignoniaceae” (Paxton).

NOTE: Comesperma,-atis (s.n.II), > Gk. comE, ‘hair’ + ‘sperma’ in allusion to the tuft of hairs on the seed.

NOTE: the generic name Brachyscome, “with short coma, i.e. pappus bristles,” published by Henri Cassini in 1816, was formed from the masculine nom. sg. of the Greek adjectives brachys (m.),-eia (f.),-y (n.). The name has been controversial in that the -s- in the original name was meant to be later dropped by the author, but was maintained by the Committee for Spermatophyta in 1993 (“Brachyscome” Wikipedia 2016]. Since the stem is ‘brachy-‘ the name should probably be “Brachycome,” the combining -o- not necessary as ‘y’ is a semivowel.