heterogamous

The flowers are heterogamous, a few female florets in each head occurring together with several bisexual, sterile disk-florets.

In the daisy family, the flower heads are made up of many small flowers called florets, and are either homogamous or heterogamous.

Heterogamous heads are made up of two types of florets, ray florets near the edge and disk florets in the center.

The ova are defined as the larger gametes in a heterogamous reproduction system, while the smaller, usually motile gamete, the spermatozoon, is produced by the male.

In nearly all heterogamous animal species, offspring are ordinarily carried by the female until birth, but in fish of the Syngnathidae family (pipefish and seahorses), males perform this function.

The author, in an appendix to the novel, explains that the idea for the society in which the story takes place originated from a study of reproductive cycle of aphids, which is heterogamous.

It is apparently defined taxonomically on the basis of plesiomorphies (heterogamous, disciform capitula with perfect/fertile disk florets and pistillate ray florets), and needs to be re-circumscribed.

Lower pairs are equal in size (homogamous units), and upper pairs include one awned bisexual spikelet and one awnless sterile spikelet (heterogamous units).

In botany, a plant is heterogamous when it carries at least two different types of flowers in regards to their reproductive structures, for example male and female flowers or bisexual and female flowers.

Plants with heads that have florets of two or more sexual forms are called heterogamous and include radiate and disciform head forms, though some radiate heads may be heterogamous too.

Heads may have florets of one sexual morphology - all bisexual, all carpellate or all staminate (when they are called homogamous), or may have mixtures of two or more sexual forms (heterogamous).