The period of pollination groups all cultivars into two families : those that shed pollen before they can receive pollen ( protandrous ), and those that shed pollen after becoming receptive to pollen ( protogynous ) . < ref name = " GROWING PECANS
22.
There is dispute, however, over whether this occurs in " B . prionotes " : one study claimed to have confirmed " protandrous development ", yet recorded high levels of stigmatic receptivity immediately after anthesis, and long pollen viability,
23.
Both the isopod parasite and its barnacle host are hermaphroditic crustaceans with a free-swimming larva and a sessile adult . " H . balani " is a protandrous hermaphrodite that develops into a female only after attaching to its adult host.
24.
Although the species is protandrous, levels of self-pollination can be high The tree can grow very rapidly; where planted in persistently moist soil, trunk width of 13-year-old trees increased by 4 cm per annum at breast height ( d . b . h . ).
25.
:: : If you want to be even more specific, sequential hermaphrodites may be further classified as " protogynous " ( starting as female and then possibly changing into a male ) or " protandrous " ( starting as male and then possibly changing into a female ).
26.
They have been the major focus of research on protandrous sex-change in marine invertebrates and have been used to demonstrate that sex change is environmentally mediated ( the timing of sex change depends on association with other individual snails ) . " Crepidula fornicata " and " Crepidula onyx " are well-studied examples of invasive, exotic species in marine habitats.
