Polystichum

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Polystichum
Polystichum setiferum
Scientific classification
Kingdom: Plantae Division: Pteridophyta Class: Pteridopsida Order: Dryopteridales Family: Dryopteridaceae Genus: Polystichum Roth
Species
See text.

Polystichum is a genus of about 180 species of ferns with a cosmopolitan distribution. The highest diversity is in eastern Asia, with about 120 species in China alone; Africa (17 species), North America (15 species), and Europe (5 species) have much lower diversity.

Many ferns of this genus have stout, slowly-creeping rootstocks that form a crown, with a vase-like ring of evergreen fronds 30-200 cm long. The sori are round, with a circular indusium. The stipes have prominent scales. The genus differs from Dryopteris in the indusium being circular, not reniform, and in having stronger, more persistent fronds with a harder, somewhat rough, texture.

Hybridisation is frequent in the genus, with several named hybrids.

Several species are grown as ornamental plants in gardens.

Polystichum species are used as food plants by the larvae of some Lepidoptera species including Pharmacis fusconebulosa.

[edit] Selected species

Polystichum acanthophyllum Polystichum acrostichoides - Christmas Fern Polystichum aculeatum - Hard Shield Fern Polystichum acutidens Polystichum acutipinnulum Polystichum alcicorne Polystichum aleuticum Polystichum andersonii Polystichum apici-sterile Polystichum assurgens Polystichum atkinsonii Polystichum atuntzeense Polystichum auriculatum Polystichum australiense Polystichum austro-tibeticum Polystichum bakerianum Polystichum biaristatum Polystichum bicolor Polystichum bomiense Polystichum brachypterum Polystichum braunii - Braun's Shield Fern Polystichum brunneum Polystichum californicum Polystichum castaneum Polystichum christii Polystichum chunii Polystichum conaense Polystichum craspedosorum Polystichum cyclolobum Polystichum cystostegia Polystichum decorum Polystichum deltodon Polystichum dielsii Polystichum discretum Polystichum dudleyi Polystichum duthiei Polystichum ellipticum Polystichum erinaceum Polystichum erosum Polystichum excellens Polystichum eximium Polystichum falcatipinnum Polystichum falcatum - Sickle-leaved Holly Fern Polystichum falcilobum Polystichum falcinellum Polystichum fallax Polystichum formosanum Polystichum garhwalicum Polystichum gongboense Polystichum gyirongense Polystichum gymnocarpum Polystichum hancockii Polystichum hecatopteron Polystichum herbaceum Polystichum ilicifolium Polystichum imbricans Polystichum incongruum Polystichum integripinnulum Polystichum lonchitis Polystichum jizhushanense Polystichum kiusiuense Polystichum kodamae Polystichum kruckebergii Polystichum kwakiutlii Polystichum lachenense Polystichum lanceolatum Polystichum lemmonii Polystichum lentum Polystichum lepidocaulon Polystichum letum Polystichum lhasaense Polystichum lichiangense Polystichum lonchitis - Holly Fern Polystichum longidens Polystichum longipaleatum Polystichum longipes

Polystichum luctuosum - Mourning Shield Fern Polystichum macleae Polystichum macrochlaenum Polystichum makinoi Polystichum martini Polystichum mayebarae Polystichum mediocre Polystichum medogense Polystichum microchlamys Polystichum minusculum Polystichum mohrioides Polystichum mollissinum Polystichum monotis Polystichum monticola - Mountain Shield Fern Polystichum morii Polystichum moupinense Polystichum munitum - Sword Fern Polystichum muricatum Polystichum nakenense Polystichum neolobatum Polystichum nepalense Polystichum ningshenense Polystichum nyalamense Polystichum obliquum Polystichum omeiense Polystichum orientali-tibeticum Polystichum paradoxum Polystichum paramoupinense Polystichum parvipinnulum Polystichum piceopaleaceum Polystichum platychlamys Polystichum polyblepharum - Tassel Fern Polystichum prescottianum Polystichum prionolepis Polystichum proliferum - Mother Shield fern Polystichum pseudo-castaneum Polystichum pseudomakinoi Polystichum pungens - Forest Shield Fern Polystichum qamdoense Polystichum rarum Polystichum retrorsopalaeceum Polystichum rhombiforme Polystichum rhomboideum Polystichum richardii Polystichum rigens Polystichum rotundilobum Polystichum scopulinum Polystichum semifertile Polystichum setiferum - Soft Shield Fern Polystichum setigerum Polystichum setosum Polystichum shensiense Polystichum silvaticum Polystichum simplicipinnum Polystichum sinense Polystichum squarrosum Polystichum stenophyllum Polystichum stimulans Polystichum submite Polystichum thomsoni Polystichum tialoshanense Polystichum tibeticum Polystichum transvaalense - Stemmed Shield Fern Polystichum tripteron Polystichum tsuchuense Polystichum tsussimense - Korean Rock Fern Polystichum tumbatzense Polystichum vestitum - Prickly shield fern Polystichum virescens Polystichum watii Polystichum wilsoni Polystichum wuyishanense Polystichum xiphophyllum Polystichum yadongense Polystichum yigongense

Selected hybrids

• Polystichum × bicknellii (P. aculeatum × P. setiferum)
• Polystichum × illyricum (P. aculeatum × P. lonchitis)
• Polystichum × lonchitiforme (P. lonchitis × P. setiferum)

Polystichum tsussimense

[edit] External links

• Jepson Manual Treatment