description
Buckwheat produces a fruit referred to as an achene, which means it contains
a single seed that doesn't open at maturity. Although the name of the plant
implies it is a cereal grain like wheat, it isn't; it's a member of the
Polygonaceae family of flowering plants that includes rhubarb and sorrel.
Buckwheat hulls are the hard outer shells that house the seeds of buckwheat
grain. The hulls are strong, aromatic and do not retain or reflect heat.
This introduced annual plant is ½–2½' tall, branching occasionally. It is
more or less erect, but has a tendency to sprawl. The stems become ribbed
and reddish green with maturity; otherwise they are light green and round.
The alternate leaves are up to 4" long and 3" across. They are sagitate or
cordate, indented at the base, and often tapering abruptly above the middle.
Their margins are smooth or slightly undulate. The lower leaves have slender
petioles, while the upper leaves are sessile. Usually, neither the stems nor
the leaves are hairy, although the upper stems are hairy on some cultivars.
One or two racemes of flowers develop from the axils of the upper leaves; some
of these racemes may be terminal. These racemes are 1-3" long and they are
densely crowded with whorls of flowers. Each flower is up to ½" across,
consisting of 5 petal-like sepals, 8 white stamens with pink anthers, a
tripartite white style, and no petals. The sepals are white, sometimes becoming
green toward the throat of the flower. The outer surface of the sepals is
occasionally tinted light pink, particularly on the flower buds. The blooming
period occurs during the summer and lasts 1-3 months. There is a pleasant floral
scent. Each flower is replaced by a winged achene with 3 sides. The membranous
wings of this achene form a heart-like shape with smooth edges. To some extent,
the achenes can be blown about by the wind because of their sizable wings. The
root system consists of a taproot.
common names & nomenclature
The name 'buckwheat' or 'beech wheat' comes from its triangular seeds, which
resemble the much larger seeds of the beech nut from the beech tree, and the
fact that it is used like wheat. The word may be a translation of Middle
Dutch boecweite: boec (modern Dutch beuk), beech + weite (mod. Dut. weit),
wheat; or may be a native formation on the same model as the Dutch word.
Also known as:
common buckwheat, beech wheat