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Epilobium hirsutum seed head dispersing seeds. In spermatophyte plants, seed dispersal is the movement, spread or transport of seeds away from the parent plant. [1] Plants have limited mobility and rely upon a variety of dispersal vectors to transport their seeds, including both abiotic vectors, such as the wind, and living vectors such as birds.
The fruit resembles a tumbleweed in that it is wind-dispersed and tumbles, an unusual mechanism of seed dispersal (see Diaspore (botany)). Anemone virginiana was also given the common name "Thimbleweed" due to its pistil resembling the shape of a thimble. This plant is very durable in different weather conditions, ranging from part shade to sun ...
He describes the morphology of interactions between fruits and flowers, and classifies dispersal in invertebrates, fish, reptiles, birds, mammals, ants, wind, water and the plant itself. Janson in 1983 continued the study on seed dispersal syndromes and classified seed dispersal syndromes of fruit by size, colour and husk or no husks in species ...
Wind dispersed fruits that tumble or roll on the ground, sometimes known as "tumble fruits", are rare. Some are technically achenes. Highly inflated indehiscent fruits that may facilitate tumbling include Alyssopsis, Coluteocarpus, Physoptychis, Sutherlandia, and Physaria. [24]
The second major step in the development of pecan was a change from wind-dispersed fruits to animal dispersion. This dispersal strategy coincides with developing a husk around the fruit and a drastic change in the relative concentrations of fatty acids. The ratio of oleic to linoleic acids is inverted between wind- and animal-dispersed seeds.
The fruits are ribbed, inconspicuous, oval-shaped brown less than 0.5 inches in diameter, with persistent bristles. Its seeds are wind dispersed and its fruit resemble dandelion seed heads. [7] [8] White and bristly cypselae that are 2-4mm long are continual on plant. [4]
It is insect pollinated, and sets fruit between March and April. Its seeds are wind dispersed. [1] ... It tolerates flooding but not fire or wind. [1]
In Oleaceae, the seed dispersal is almost entirely by wind or animals. In the case that the fruit is a berry, the species is mostly dispersed by birds. The wind-dispersed fruits are samaras. Some of the older works have recognized as many as 29 genera in Oleaceae. [10]