Questions regarding insect-pollination (Bino et al., 1984; Porsch, 1910) and wind-pollination
(Buchmann et al., 1989; Niklas & Buchmann 1987; Niklas & Kerchner, 1986; Niklas et al., 1986) have received the most attention.
Dahlia coccinea produced few achenes per capitulum under both wind-pollination
and autonomous-self-fertilization treatments (1.3 [+ or -] 0.5 and 0.1 [+ or -] 0.1 achenes/capitulum, respectively).
All varieties are best sown in block formation rather than in rows, as this aids wind-pollination
and allows those delicious, succulent cobs to be produced.
Evolution of wind-pollination
in Fraxinus (Oleaceac)--an ecophylogenetic approach.
Consequently the wind-pollination
hypothesis appears to be of minor importance in ash.
Since the seed lacks a specialized wind-pollination
piece and contains some loose, air-filled tissue characteristic of water plants, the plant from which it sprang may have lived in an aquatic or marshy habitant, suggest Galtier and Nicholas P.
in the understory of a rain forest in Costa Rica.