Vittaria isoetifolia Bory

Species

Pteridophytes > Polypodiales > Pteridaceae > Vittarioideae > Vittaria

Characteristics

Plants epilithic or epiphytic. Rhizome short-decumbent, to 2 mm in diameter, set with roots, short, closely spaced persistent stipe bases and scales, scales chartaceous, ferrugineous to castaneus, sessile, subulate, cuneate to cordate, dentate, to 8 mm long, to 1 mm wide. Fronds crowded, pendent, to 720 mm long; stipe poorly differentiated, to 4 mm long, initially sparsely set with scales similar to, but smaller than, those on rhizome; lamina carnose-coriaceous, simple, linear, entire, to 716 mm long, to 3 mm wide, glabrous adaxially and abaxially. Venation obscure. Sori along a near-marginal vascular commissure, sunken in two submarginal grooves extending the entire length of the lamina; receptacle paraphysate, paraphyses branched, branch apices terminate in a clavate, indurated cell; sporangium long-stalked, simple, capsule globose in lateral view, with 14(-16) indurated annulus cells, epistomium (3-)4(-5)-celled, hypostomium (3-)4(-5)-celled, stomium with 4 narrow cells of which walls are conspicuously thickened. Spores brown, ellipsoidal, monolete, smooth, (52-)58.37(-70) x (30-)34.75(-38) µm.
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Rhizome short-decumbent, up to 2 mm in diam., set with roots, short, closely spaced, persistent stipe bases and scales; scales ferruginous to castaneous, sessile, subulate, cuneate to cordate, dentate, up to 8 x 1 mm. Fronds crowded, pendent, up to 720 mm long. Stipe poorly differentiated, up to 4 mm long, initially sparsely set with scales similar to, but smaller than, those on rhizome. Lamina carnose-coriaceous, simple, linear, entire, up to 716 x 3 mm, glabrous adaxially and abaxially; venation obscure. Sori along a near-marginal vascular commissure, sunken in 2 submarginal grooves extending entire length of lamina; receptacle paraphysate.
Rhizome shortly creeping, c. 3 mm in diameter, set with narrowly lanceolate, attenuate, clathrate, strongly pseudo-serrate, dark brown rhizome-scales up to 10 mm long. Fronds tufted, simple, sessile, carnose-coriaceous, pendant; lamina very narrowly linear, with a pale brown or pale greyish green base when dried; midrib and veins obscure. Sori in two deep intramarginal grooves and with intestiniform paraphyses.
Rhizome shortly creeping, set with dark brown rhizome scales up to 10 mm long. Fronds sessile, very narrowly linear to narrowly elliptic, suberect to pendulous, glabrous. Sori exindusiate, in 2 marginal, submarginal or intramarginal grooves, midrib and veins obscure.
Perennial with short rhizome. Fronds simple, sessile, pendent, to 20 cm long, lamina linear. Null Sori in 2 inframarginal grooves with paraphyses.
Life form perennial
Growth form herb
Growth support epiphyte
Foliage retention -
Sexuality -
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) -
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity 4-6
Soil texture 7-9
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-12

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Vittaria isoetifolia habit picture by Schnittler Martin (cc-by-sa)

Leaf

Vittaria isoetifolia leaf picture by Augustin Soulard (cc-by-sa)
Vittaria isoetifolia leaf picture by Schnittler Martin (cc-by-sa)
Vittaria isoetifolia leaf picture by Schnittler Martin (cc-by-sa)

Distribution

Vittaria isoetifolia world distribution map, present in Comoros, Kenya, Madagascar, Mozambique, Malawi, Réunion, eSwatini, Tanzania, United Republic of, South Africa, and Zimbabwe

Identifiers

LSID urn:lsid:ipni.org:names:17233970-1
WFO ID wfo-0001108008
COL ID 5BMSR
BDTFX ID -
INPN ID 706927
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Vittaria gueinzii Vittaria longidentata Vittaria sarmentosa Vittaria tenera Vittaria isoetifolia