Displaying 1 - 20 out of 114 Object(s)
| Term | Definition | |
|---|---|---|
| Aerial tuber | A tuber that arises from an aerial root in contrast to a true tuber which arises from underground roots or stems. |  |
| Alternation of generations | Referring to the alternation of the haploid (n) and diploid (2n) generations of plants. In the lower plants (e.g., the bryophytes), the gametophyte generation is the dominant phase and the sporophyte generation depends on it for photosynthate. In contrast, in the higher plants (e.g., the flowering plants) the sporophyte generation is the dominant phase and the gametophyte depends on it for photosynthate. |  |
| Androdioecy (androdioecious) | Referring to the sexual condition of a species that bears only staminate flowers on some plants but staminate and pistillate flowers or bisexual flowers on other plants. |  |
| Andromonoecy (andromonoecious) | Referring to the sexual condition of a species that bears staminate and bisexual flowers on the same plant; in the Mimosaceae, referring to the presence of staminate and pistillate flowers in the same cluster. |  |
| Anemophily (anemophilous) | Pollination by the wind, i.e., the movement of pollen by the from the stamens of a flower to the stigma of another flower. This includes movement for the anther to the stigma of the same flower, from the anther to the stigma of another flower on the same plant, or from the anther of a flower on one plant to the stigma of a flower on another plant. Same as wind pollination. |  |
| Aneomochory (nemochorous) | Referring to a fruit or seed adapted for dispersal by wind. |  |
| Annual | Plant with a life cycle of one year or less from seed to maturity and death. Compare with biennial and perennial. |  |
| Ant dispersal | Referring to the process in which ants carry away diaspores from parent plants thereby effecting dispersal of those plants. The ants are usually attracted to fleshy structures associated with seeds such as elaiosomes. |  |
| Antheridium (plural = antheridia) | Referring to a multicellular haploid structure in which sperm is produced in mosses, hepatics, ferns, and relatively few vascular plants. |  |
| Apomixis (adj. = apomitic) | In the broad sense, any form of asexual reproduction, and, in the narrow sense, seed production without fertilization. This term is more commonly used for the production of seed without fertilization. |  |
| Archegonium (plural = archegonia) | Referring to a multicellular haploid structure in which the egg is produced in mosses, hepatics, ferns, and relatively few vascular plants. | |
| Asexual reproduction | Referring to the production of new plants not involving the fusion of sperm and eggs, e.g., vegetation reproduction by buds or runners. | |
| Autogamy (autogamous) | Referring to fertilization resulting from the union of a sperm and an egg from the same plant. |  |
| Ballistic dispersal | A type of dispersal in which seeds are ejected from the fruits upon dehiscence. Same as autochorous. |  |
| Bat dispersal | Referring to diaspores that are carried away from the mother plant by bats. Most bat-dispersed seeds dispersed by bats have either berry-like fruits or fruits with the seeds provided with a fleshy associated structure such as an aril. A few other species have the fruits surrounded by a fleshy perianth (e.g., the diaspores of species of Cecropia). Same as chiropterochory. |  |
| Bat-pollination | Same as chiropterophily. |  |
| Biennial | A plant that completes its life cycle in two seasons. Compare with annual and perennial. |  |
| Big bang phenology | A flowering strategy in which a plant produces very large numbers of flowers for a very short period of time. See multiple bang and steady state phenology. |  |
| Bulbil | A small bulblike structure that functions in asexual reproduction, usually formed in axils or sinuses of leaves. |  |
| Buzz pollination | A type of pollination in which bees vibrate their indirect flight muscles to cause the release of pollen, usually from poricidal anthers; e.g., in many species of Solanum (Solanaceae). |  |