BIOL 2004 Study Guide - Midterm Guide: Endosperm, Poaceae, Rhizobium
25 Feb 2016
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Pollinators attracted to flowers by colours and nectar. Peduncle and receptacle: flower stem, receptable: swollen part at end of stem. Can bear a single flower or groups of flowers. Inflorescence = group of flowers: pedicel: each flower stalk within an inflorescence. Sepals: protect the flower bud before it opens, usually green, form first and the lowest on the receptacle, together known as the calyx. Petals: colourful modified leaves that attract pollinators, form second and inside of above calyx on the receptacle, together known as corolla. Calyx and corolla together known as the perianth. Stamens: male = pollen producing, together known as ancroecium, form third and inside or above the perianth, each stamen has a long filament with an anther. Anther composed to two lobes and 4 pollen sacs. Pollen grains (male gametophytes) form within pollen sacs. Carpels: female = ovule bearing, collectively known as gynoecium, form last and inside or above andoecium, can be in forms of one or more.
