Acuminate: tapering to a pointend apex. 

Acute; tapering to the apex with the sides straight or nearly so: usually less tapering than acuminate 

Androgynophore: an internode of the floral axis between the corolla and stamens and the pistil. 

Anther-lobe: pollen containing sac of the stamen. 

Apetalous: without a short, but not rigid point. 

Apex; the growing point of any stucture 

Apiculate: ending as an abrupt slender tip which is not stiff 

Appendages: an attached secondary part to a main stucture. 

Aristate: with an awn or stiff  bristle. usually at the apex 

Aril: an appendage arising from the hilum and covering the seed. 

Attenuate:narrowed,tapered (usually at  base) 

Awn: a bristle-like terminal appendage, as in wheat. 

Axil: the angle formed by the upper side of a leaf and the stem. 

Axillary: situated in the axil, usually in the axil of stem and leaf. 

Axis: the main or central line of development of a plant or organ.