Juncaceae


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Juncaceae

[‚jəŋ′kās·ē‚ē]
(botany)
A family of monocotyledonous plants in the order Juncales characterized by an inflorescence of diverse sorts, vascular bundles with abaxial phloem, and cells without silica bodies.

Juncaceae

 

(rush), a family of monocotyledonous plants including perennial and annual herbs and, less commonly, shrubs. The leaves have sheaths and linear or cylindrical blades; sometimes all the leaves are reduced to sheaths. The inconspicuous flowers are regular and usually bisexual; they are pollinated by the wind and gathered in capitate, fascicular, pa-nicled, or umbellate inflorescences. Rarely are the flowers solitary. The perianth is usually calycine and composed of six greenish or brownish segments. There are usually six stamens. The fruit is a capsule, surrounded by the perianth.

There are eight or nine genera, comprising approximately 400 species. The plants grow in temperate and cold regions and in high-mountain tropics, usually in moist and swampy places. The genera Juncus and Luzula are found in both hemispheres; both are represented in the USSR (about 100 species). The remaining genera are found only in the southern hemisphere.

REFERENCE

Takhtadzhian, A. L. Sistema i filogeniia tsvetkovykh rastenii. Moscow-Leningrad, 1966.

T. V. EGOROVA

References in periodicals archive ?
We found positive selections for Graminaceae, Juncaceae and Cyperaceae ([W.
1995) relaciono a Juncaceae con la familia Cyperaceae.
Caribe: hay 16 familias, Achatocarpaceae, Berberidaceae, Buxaceae, Coriariaceae, Cymodoceaceae, Cytinaceae, Grossulariaceae, Juncaceae, Krameriaceae, Montiaceae, Myricaceae, Nelumbonaceae, Ruppiaceae, Surianaceae, Tetrachondraceae y Tropaeolaceae.
a new cushionforming Juncaceae from the high Andes of Ecuador.
IS H Trifurcia lahue (Molina) Goldblatt IS-LB H Juncaceae Juncus pallescens Lam.
1) Juncaceae Oxychloe castellanosii Barros (7) Malvaceae Nototriche copon Krapov.
Sis-bog TER Sisyrinchium convolutum Nocca Sis-con TER Juncaceae Juncus breviculmis Balslev Jun-bre HEL-jun Juncus cyperoides Lah.
Bofedales (bf), localizados entre 4500 y 4700 m en suelos saturados de agua, con especies pulviniformes o porte almohadillado (Apiaceae, Asteraceae, Juncaceae, Poaceae) y pequenas especies de porte arrosetado como Nototriche (Malvaceae), Hypochaeris (Asteraceae), entre otras.
Species were grouped into the following life forms: forbs (excluding Graminoids), shrubs, trees, and grasses (Poaceae, Juncaceae and Cyperaceae).
Se hallaron grandes cantidades de espiguillas y algunas hojas (Figuras 2 y 5) y tallos aislados correspondientes a generos de las familias Juncaceae y Cyperaceae (Figuras 6a-d).