The 'Juncaceae', or the 'Rush Family', is a rather small
monocot flowering plant family. There are 8
genera and about 400
species. Many of these slow-growing plants superficially resemble
grasses, though are
herbs or
woody shrubs (as ''
Prionium''), growing on infertile
soils. Some may be found in temperate to frigid climates or on tropical mountains. They grow on wet or damp soils, others on dry soils. A few are
annuals, but most are
perennials.
The
leaves are
evergreen and well-developed in a basal aggregation on an erect stem. They are alternate and tristichous (i.e. with 3 rows of leaves up the stem, with each row of leaves arising one-third of the way around the stem from the previous leaf). Only in the genus ''
Distichia'' are the leaves distichous. The rushes of the genus ''
Juncus'' have flat, hairless leaves or cylindrical leaves. The leaves of the wood-rushes of the genus ''
Luzula'' are always flat and bear long white hairs.
The plants are
hermaphroditic or, rarely,
dioecious. The small and insignificant
flowers are arranged in inflorescences of loose
cymes, but also in rather dense heads or
corymbs at the top of the stem or at its side. Typical for this family are the
tepals (or perianth segments). There is no clear distinction between
petals and
sepals. They are usually arranged with two
whorls, each containing three thin, papery tepals. They are not brightly colored and their color can vary from greenish to whitish, brown, purple, black, or hyaline. There are three
stigmas in the center of the flowers. As is characteristic of monocots, everything is a multiple of three.
The
fruit is usually a non-fleshy, three-sectioned
dehiscent capsule containing many seeds.
The dried
pith of plants of this family was used to make a type of
candle known as a
rushlight.
Reference
★
National Plant Data Center
External links
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Information and pictures
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Pictures of species