Polystichum


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Related to Polystichum: Polystichum acrostichoides

Polystichum

 

a genus of ferns of the family Aspidiaceae. They are terrestrial, rhizomatous plants, usually having stiff, leathery fronds. The sori (clusters of sporangia) are orbicular and, for the most part, have an indusium—a peltate covering. The approximately 175 species of Polystichum are widely distributed. Seven or eight species are found in the USSR, growing in forests and on rocks. Some species are grown as ornamentals in the open ground and in greenhouses. The plants are propa-gated from spores or rhizomes.

References in periodicals archive ?
Hence, this project aims to investigate the epiphytic microflora diversity of Polystichum acrostichoides and to demonstrate that like many other plants, ferns show qualitative and quantitative seasonal variation in diversity of their epiphytic communities.
POLYSTICHUM {poh-LISS-tik-um} Roth 1799 * Holly Ferns * [Greek, poly, many, stichos, rows; alluding to the son on each pinna.
More than 150 taxonomic innovations are presented and seven new species (in Lycopodium, Asplenium, Polystichum, Radiogrammitis, and Oreogrammitis) and two new nothospecies (in Asplenium) are described.
They hypothesized that the northern subtropical jetstream was the pathway responsible for delivering ancestral spores of three of five endemic lineages of Dryopteris (Geiger and Ranker, 2005), the two endemic Polystichum lineages (Driscoll and Barrington, 2007), potentially one lineage of Hymenophyllum (Ebihara et al.
The genus was found to be nested within the polystichoid fern clade as putative sister to Polystichum sect.
Some ferns, such as the soft shield fern polystichum setiferum, occasionally produce bulbils along their central stem.
Ferguson chose a large golden fullmoon maple (Acer japonicum), two deciduous magnolias, and native ferns (Adiantum aleuticum, Blechnum spicant, and Polystichum munitum), plus a few exotics like hellebores, rhododendrons, Siberian irises, smoke tree, and yew.
However, certain plants tend to favor this habitat, including Diplazium pycnocarpon, Fraxinus quadrangulata, Hepatica acutiloba, Mitella diphylla, Polystichum acrostichoides, Ranunculus hispidus, R.
Spore abortion is a key character that provides evidence of hybridization (Moran, 2004), and it has been found in many hybrids in different genera such as Adiantum (Moran and Watkins, 2002; Rojas-Alvarado and Herrera-Martinez, 2012), Asplenium (Rojas-Alvarado and Chaves-Fallas 2010), and Polystichum (Barrington 1985).
Ferns in the mesic woods include Adiantum pedatum, Athyrium pycnocarpon, Botrychium virginianum, Cystopteris protrusa, Dryopteris goldiana, Dryopteris carthusiana, Onoclea sensibilis, and Polystichum acrostichoides (rare).
Native species that occur at some of the highest elevations (above 3000 m) include: Asplenium adiantum-nigrum (Aspleniaceae), Cystopteris douglasii (Cystopteridaceae), Pellaea ternifolia (Pteridaceae), and Polystichum haleakalense (Dryopteridaceae).
Distribution: K/O/Mo/Ma/H Polystichum Roth (E) Polystichum bonseyi W.