Buckwheat honey is gathered by honeybees from the nectar of the delicate white buckwheat blossoms, an uncommonly limited plant source.

荞麦蜜是由细腻洁白荞麦花开的花蜜的蜜蜂，一个非同寻常的有限的植物源收集。

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The histochemistry testes show that the starch grains in nectariferous tissue is the main source of the nectar.

组织化学试验表明，蜜腺组织细胞内的淀粉粒是蜜汁的主要物质来源之一。

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He suggested that the bees are delivering a complex set of instructions about how to find a rich nectar source.

BBC: NEWS | Science/Nature | Waggle dance leads bees to nectar

Both offer tours, tastings and the chance to smell the sweet nectar of the blue agave plants -- the source of tequila -- as they are slowly cooked in huge ovens.

BBC: Guadalajara on a plate