Table 1. Sexual system database ontology in plants.

Trait	States
Sexual systema	Hermaphrodite, monoecy, dioecy, gynodioecy, androdioecy, gynomonoecy, andromonoecy, polygamodioecy, polygamomonoecy, apomictic, otherb
Genotypic (sex determination)	Male heterogametic, female heterogametic, GSD, polygenic
Karyotype	ZO, ZW, XY, XO, WO, homomorphic, complex XY (e.g., X1X2Y), complex ZW (e.g., Z1Z2W)
Molecular basis	Dosage, Y dominant, W dominant
Selfing	Self incompatible, self compatible
Growth form	Herb, shrub, tree, herbaceous vine, liana/woody vine
Woodinessc	W woody, H herbaceous, variable
Woodiness countc	#W; #H; #variable
Life form	Annual, perennial
Chromosome numberd	(List of records for counts)
Chromosome numberd (minimum)	(integer number)
Chromosome numberd (mean)	(real number)

^aSexual system is the morphological system. In some species, hermaphrodites function primarily as males or primarily as females, but this information is not known for the majority of species in the database.

^bSexual system states include: Hermaphrodite, plants whose flowers have both male and female parts. Monoecy, plants have separate male and female flowers on the same plant. Dioecy, all plants are either female or male. Gynodioecy, both female and hermaphrodite plants present. Androdioecy, both male and hermaphrodite plants present. Gynomonoecy, female and hermaphrodite flowers within a plant. Andromonoecy, male and hermaphrodite flowers within a plant. Polygamodioecy, male, female, and hermaphrodite plants present. Polygamomonoecy, male, female, and hermaphrodite flowers within a plant. Apomictic, asexual/parthenogenetic.

^cAs reported by Zanne et al.^23,24.

^dSeparate columns indicate gametophytic (after meiosis; ‘haploid’ number) and sporophytic chromosome counts (before meiosis; ‘diploid’ number).