Anther appendage

A complete stamen (Fig. 93Z ) consists of a more or less slender stalk portion called a filament and a terminal appendage called the anther or microsortis. The anther is generally vertically halved by an upgrowth of th e filament, called the dividing the anther... 

Other distinguishing features Anthers with spirally-twisted awn-like appendages. Calyx enlarged in fruit, becoming diskshaped and membranous. 

Fig 9.5 Flower morphology of Heterocentron elegans (A)-(B), Clidemia octona (C)-(F) and of Dissotis rotundifolia (G)-(ff). (A) Mature flower bud with four petals (removed) and eight stamens. (B) Detail of flower showing a style surrounded by an extension of the ovary wall at the base. The anthers are provided with basal auriculate appendages. (C) Development of sepal lobes surrounding petal primordia. (D) Initiation of stamens and carpels. Note the... 

The androecium is highly complex, consisting of an inner tier of fertile halfstamens alternating with staminodial appendages, an intermediate tier of erect staminodes and an outer tier of refiexed filiform staminodes. Two possibilities can explain the existence of paired half-anthers in the inner tier ... 

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