Section B. General Characters and Character States:
V. Sex

A. Flower Sex (Figure 6-18-1)
(Classification based on sexual condition of the individual flower)

Imperfect or Unisexual. With stamens or carpels absent in the flower.

Neuter or Agamous. Without stamens and carpels in flower; or sex organs abortive.

Perfect or Bisexual. With both stamens and carpels or pistils in the flower.

Pistillate, Carpellate, or Female. With pistils or carpels only in the flower.

Staminate or Male. With stamens only in the flower.

B. Inflorescence Sex (Figure 18)
(Classification based on arrangement of flowers by sexual condition within an inflorescence, or total diversity of flower sexual conditions within an inflorescence)

Note: If plant sex is staminate or pistillate or hermaphroditic or neuter, then inflorescence sex would be respectively the same. The term in ( ) below is an example of the sexual condition of one inflorescence type, the head, as in composites.

Androgynecandrous. Inflorescence with staminate flowers above and below pistillate, as in the spikes of some species of Carex.

Androgynous. Inflorescence with staminate flowers inside or above and pistillate outside or below. (androgynecephalous)

Agamandrous. Inflorescence with neuter flowers inside or above and staminate outside or below. (agamandrocephalous)

Agamogynous. Inflorescence with neuter flowers inside or above and pistillate outside or below. (agamogynecephalous)

Agamohermaphroditic. Inflorescence with neuter flowers inside or above and hermaphroditic outside or below. (agamohermaphrodicephalous)

Andragamous. Inflorescence with staminate flowers inside or above and neuter flowers outside or below. (andragamocephalous)

Androhermaphroditic. Inflorescence with staminate flowers inside or above and hermaphroditic outside or below. (androhermaphrodicephalous)

Gynagamous. Inflorescence with pistillate flowers inside or above and neuter flowers outside or below. (gynagamocephalous)

Gynecandrous. Inflorescence with pistillate flowers inside or above and staminate outside or below, as in spikes of some species of Carex.

Gynehermaphroditic. Inflorescence with pistillate flowers inside or above and hermaphroditic outside or below. (gynehermaphrodicephalous)

Hermaphrodagamous. Inflorescence with hermaphroditic flowers inside or above and neuter outside or below. (hermaphrodagamocephalous)

Hermaphrodandrous. Inflorescence with hermaphroditic flowers inside or above and staminate outside or below. (hermaphrodandrocephalous)

Mermaphrodigynous. Inflorescence with hermaphroditic flowers inside or above and pistillate outside or below. (hermaphrodigynecephalous)

C. Plant Sex
(Classification based on total diversity of flower sexual conditions on a single plant within the species or population)

Androdioecious. Some plants with staminate flowers and some with perfect flowers.

Andromonoecious. Plant with staminate and perfect flowers.

Diclinous. Plant with imperfect flowers; stamens and carpels in separate flowers.

Dioecious. Plant with all flowers imperfect, but staminate and pistillate on separate plants.

Female, Carpellate, or Pistillate. Plant with pistillate flowers only.

Gynodioecious. Some plants with perfect flowers and some with pistillate.

Gynomonoecious. Plant with pistillate and perfect flowers.

Hermaphroditic or Monoclinous. Plant with all flowers perfect.

Male or Staminate. Plant with staminate flowers only.

Monoecious. Plant with all flowers imperfect, but staminate and pistillate flowers on same plant.

Polygamous. Plant with perfect and imperfect flowers.

Polygamo-dioecious. Plants dioecious, but with some perfect flowers on staminate or pistillate plants or both.

Polygamo-monoecious. Plant monoecious, but with some perfect flowers.

Trioecious. Plants staminate, pistillate or perfect.

D. General Sexual Terms

Agamous or Neuter. Without sex; sexual organs abortive.

Heterocephalous, Heterocymous, Heterospicous. Heads, cymes, spikes with flowers of different sexual conditions. Note: other inflorescence word stems could be used for appropriate inflorescence type.

Heterosexual. Inflorescences or flowers within the plant with different sexual conditions.

Homocephalous, Homocymous, Homospicous. Heads, cymes, spikes with flowers sexually uniform.

Homosexual. Inflorescences or flowers sexually uniform.