Ancient clones

The importance of ancient clones is that they provide proof of the durability of horizontal resistance. Such clones may date from centuries, even millennia, ago. They are common in figs (Ficus), olives Olea), date palms (Phoenix), citrus (Citrus), horseradish (Armoracea), garlic (Allium), ginger (Zingiber), turmeric (Curcuma), saffron (Crocus), rhubarb (Rheum), etc. Andromonoecious

Having both male and hermaphrodite flowers on the same plant. See: Cucumis melo. Anethum graveolens

Dill. See also: curry powders. Angiosperm

Seed-forming plants whose seeds are protected by a seed-coat. This group includes the flowering plants, both monocotyledons and dicotyledons, and it provides virtually all human food, either directly as vegetable matter, or indirectly, as meat. A few Angiosperms are parasitic on other plants. They lack chlorophyll and they include dodder (Cuscuta spp.), broomrape (Orobanche spp.) and witchweed (Striga spp.). It is possible to breed crops for horizontal resistance to these parasitic Angiosperms. See also: Gymnosperm. Annual plant

A plant which flowers, fruits, and dies in one season. Anther

The male reproductive part of a flower that produces pollen. Anthesis

The time of pollen production. Anthracnose

A plant disease caused by a species of the fungus called Colletotrichum (pronounced Coll-ee-TOT-tree-coom). The symptoms are sunken lesions, several millimetres in diameter, with small, black, sporulating, fungal bodies on the sunken surface.

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