Cyrtomium C.Presl

Netvein hollyfern (en), Aspidie (fr)

Genus

Pteridophytes > Polypodiales > Dryopteridaceae > Dryopteridoideae

Characteristics

Plants terrestrial, perennial, evergreen. Rhizome erect or ascending, short, (together with basal stipe) densely covered with scales; scales concolorous or bicolorous, dark brown to blackish brown, ovate or broadly lanceolate, margins ciliate, fimbriate, toothed, or entire, apex acute or acuminate. Fronds 2-6 per rhizome, caespitose, monomorphic; stipe stramineous or brownish stramineous, canaliculate adaxially, scaly, scales similar to those on rhizome; distal stipe scales sparser, similar to but smaller than basal stipe scales. Lamina linear-lanceolate, lanceolate, ovate-lanceolate, broadly lanceolate, or deltoid-ovate, imparipinnate, apex with apical pinna somewhat dissected at base, rarely simple; rachis sulcate adaxially, without proliferous bulbils, scaly, scales smaller than distal stipe scales. Pinnae lanceolate, ovate-lanceolate, falcate, or ovate, acroscopic base or both acroscopic and basiscopic bases auriculate (sometimes auricles indistinct), margins entire or toothed; texture papery or leathery, rarely thinly papery, with or without lanceolate or linear microscales abaxially, glabrous adaxially; venation reticulate, with 2-8 rows of oblique-polygonal areoles on each side of midrib, each areole with 1-3 free included veinlets. Sori orbicular, terminal on included veinlets, in 1 to a few rows on each side of midrib, indusiate; indusia peltate, orbicular.
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Plants terrestrial or on rock. Stems erect or ascending, stolons absent. Leaves monomorphic, evergreen. Petiole ± 1/2--3/4 length of blade, base not swollen; vascular bundles more than 3, arranged in arc, ± round in cross section. Blade oblong-lanceolate, 1-pinnate with pinnae not lobed, distal pinnae only slightly smaller, blade ending in basally lobed pinna ± similar to lateral pinnae, papery or somewhat leathery. Pinnae not articulate to rachis, segment margins crenate to spinulose, sometimes also coarsely dentate; proximal pinnae not reduced, petiolulate, equilateral or somewhat inequilateral with acroscopic base more developed; costae adaxially grooved, grooves continuous from rachis to costae; indument of filiform scales abaxially, absent adaxially. Veins elaborately anastomosing, areoles formed with 1--3 included veinlets. Sori in 2 or more rows between midrib and margin, round. Indusia peltate, persistent or caducous. Spores brown, with inflated folds or wings. x = 41.
Terrestrial or lithophytic ferns. Rhizome short, erect or decumbent, often stout; stipe bases persistent; scales large, entire but becoming erose. Fronds tufted, monomorphic. Stipe densely scaly. Lamina pinnate; apical segment entire or irregularly pinnatifid. Pinnae falcate, acuminate, coriaceous; margins entire or dentate; veins free (not in Australia) or regularly anastomosing with included free veinlets or casually anastomosing without included free veinlets. Sori rounded, in 2-several rows on each side of the costa; indusium rounded, peltate. Spores globose to ellipsoidal, monolete.
Terrestrial ferns. Rhizomes short, ± erect, very scaly. Fronds usually 1-pinnate, scaly at least on stipes; veins free or anastomosing. Sori round, borne on veins, in 2 or more rows either side of midrib, usually protected by peltate indusia. Spores monolete.
Life form perennial
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Foliage retention evergreen
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Hardiness (USDA) 5-11

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Cultivation

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