BIOL 1902 Lecture Notes - Lecture 21: Bumblebee, Cornus Canadensis, Asclepias Syriaca

• School: Carleton University
• Department: Biology
• Course: BIOL 1902
• Professor: Michael Runtz

Document Summary

Grass-of-parnassus: called pseudonectaries that contain no nectar, tricking insects into visiting the flower through deceit. Grass pink (calopogon) pseudopollen: landing platform for the insect, fake stamens and pseudopollen = the lure, wi(cid:374)ged (cid:862)(cid:272)offi(cid:374)(cid:863) (cid:449)ith se(cid:454) orga(cid:374)s, high petals. If a bee lands on the pseudopollen the petal will collapses and traps the bee: (cid:862) la(cid:373) du(cid:374)k(cid:863) Common milkweed: clamping saddlebags of pollen, pollen (cid:862)saddle (cid:271)ags(cid:863) slits. White water-lily: opens first as a female flower (stigma below, sweet liquid attracts flies and beetles, the flo(cid:449)er (cid:272)loses o(cid:448)er(cid:374)ight, trappi(cid:374)g its (cid:862)guest(cid:863, the next day opens as a male. Bunchberry: grows in a shady habitat, explosive sex, also, k(cid:374)o(cid:449)(cid:374) as (cid:862)pop flo(cid:449)ers(cid:863, bunchberry flowers explode like land mines, stamens = fastest moving floral parts in the world. Twayblades also have explosive sex: opens as males with a (cid:862)(cid:272)a(cid:374)(cid:374)o(cid:374)(cid:863) (cid:449)ith polle(cid:374) read(cid:455) to fire, once the canon is fired, the flower is functionally female.