Luzula


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Luzula

 

a genus of primarily perennial herbaceous plants of the family Juncaceae. The leaves, which have closed sheaths and flat or canaliculate blades, are usually covered on the margins with white hairs. The bisexual, inconspicuous flowers are solitary or in clusters, which form a spicate, umbellate, or capitate inflorescence. The perianth has six brown or greenish scalelike segments which remain during fruiting. The fruit is a one-celled capsule containing three seeds. The seeds are distributed by ants, which eat the caruncles.

There are approximately 80 species of Luzula, found in the cold and temperate zones, primarily in the northern hemisphere. They are also encountered in tropical highlands. Approximately 30 species are found in the USSR, mainly in the tundra and forest zones and in alpine regions. Particularly widespread are the hairy wood rush (L. pilosa), which grows in shady forests and thickets, and the many-headed wood rush (L. multiflora), which is found in meadows and forest edges. Both species are eaten by livestock and, in the tundra, by reindeer. The snowy wood rush (L. nivea), the hairy wood rush, and the greater wood rush (L. silvatica) are sometimes cultivated as ornamentals.

References in periodicals archive ?
Seed dormancy in the alpine rush, Luzula Spicata L.
cantabrica [degrees]C) for 3 and Luzula months in complete hispanica.
The objective of this study was to observe and compare the responses of Luzula arctica and Luzula confusa to warming during the summer of 2010.
Herbaceous species of Calluna vulgaris, Luzula pilosa and Polygonatum odoratum were found only in the control site and still did not occur in the 4-year-old fire site (Table 1).
The structure and behavior of holocentric chromosomes have been described in different Luzula species previously, but mostly in Luzula elegans as a model species with the lowest chromosome count (2n=6) and the largest chromosomes within the family.
In more detail, the inverted meiosis has been studied in hybrids of partially agmatoploid plants of Luzula campestris (Nordenskiold, 1961) and in the symploid Luzula elegans (Nordenskiold, 1962).
The organization of spindle microtubules in mitotic cells of Luzula luzuloides investigated Madej (1998) and a LCS1 sequence in heterochromatin in L.
Malheiros-Garde and Garde (1950) coined the term agmatoploidy to describe chromosome number changes via fission in Luzula (Juncaceae).
A recent study in the Cyperales demonstrates that centromere-specific histone H3 is present at nearly even strengths along heterochromatic regions of the chromosomes in Luzula nivea (L.
macrophyllum, Isopyrum biternatum, Juncus tenuis, Lactuca floridana, Luzula multiflora, Orchis spectabilis, Osmorhiza longistylis, O.
The plants that occur here include Antennaria plantaginifolia, Arabis laevigata, Cacalia atriplicifolia, Carex pensylvanica, Dodecatheon meadia, Luzula imultiflora, Quercus velutina, Silene virginica, Thaspium trifoliatum, and Tradescantia virginiana.
procerus Luzula [_NOT REPRODUCIBLE IN ASCII] Orchidaceae Gavilea Poaceae Agrostis, Bromus, Chaetotropis, 10 spp.