Figure 2
From: Novel Insect Florivory Strategy Initiates Autogamy in Unopened Allogamous Flowers
Scanning electron micrographs of reproductive biology in chasmogamous, cleistogamous and florivore induced-pollination flowers of C. canadense. (A) Partially dissected (sepals and petals removed) pre-anthesis chasmogamous flower. Stamens are erect and anther sacs have yet to dehisce. Stigmatic surface is devoid of pollen. (B) Partially dissected (sepals are removed) post-anthesis chasmogamous flower. Anther sacs have dehisced and are devoid of pollen. Stigma is covered with pollen and pollen tubes are visible within the ovary amongst the ovules. (C) Cleistogamous flower with sepals removed and partially dissected ovary. Filaments of five stamens are visible in close proximity to the ovary wall. Anther sacs of each stamen are positioned above the stigma and pollen tubes are visible coming from within. (D) Dissected chasmogamous flower with petal cone removed to illustrate dehiscing anthers near the stigma. Pollen grains and pollen tubes are visible on the stigma, and pollen tubes are visible within the ovary near the ovules. A = anther; O = ovary Ov = ovule; S = stigma. Scale bar = 500 μm (A); 1 mm (B and D); 200 μm (C).
