Microgramma mauritiana (Willd.) Tardieu In Humbert

Species

Pteridophytes > Polypodiales > Polypodiaceae > Polypodioideae > Microgramma

Characteristics

Plants epilithic or epiphytic. Rhizome wide-creeping, dorsiventrally flattened, to 5 mm in diameter, laterally branched, dorsally with two alternate rows of short, widely spaced phyllopodia, phyllopodia to 27 mm apart, to 2 mm long, densely set with appressed scales, scales chartaceous, centrally dark brown, paler towards the margin, peltate, lanceolate, margin set with apically directed oblong cells, apical cell oblong, thin-walled, to 10 mm long, to 1.5 mm wide. Fronds hemidimorphic, fertile marginally longer and narrower than the sterile, erect, to 200 mm long; stipe articulated to the phyllopodia, adaxially shallowly sulcate, to 38 mm long, to 1 mm in diameter, glabrous; lamina herbaceous, simple, entire, sterile ovate-acute, to 170 mm long, to 50 mm wide, fertile narrowly lanceolate, acute to cuneate, to 155 mm long, to 30 mm wide, adaxially glabrous, abaxially with appressed scales along the costa, the scales, simple and branched, to 1.5 mm long; costa adaxially convex, pronounced abaxially. Venation obscure, reticulate, tertiary veins anadromous, areola with or without simple free included veinlets. Sori circular to oval, positioned at a plexus of predominantly quaternary veins in a single row on either side of the primary vein or costa, to 3 mm in diameter, exindusiate; receptacle paraphysate, paraphyses simple or apically with a few small thin-walled cells, to 0.7 mm long; sporangium long-stalked, simple, 3-seriate below the capsule, capsule with (12-)14(-15) indurated annulus cells, epistomium 4(-5)-celled, hypostomium (3-)4(-5)-celled. Spores 64 per sporangium, yellow, ellipsoidal, monolete, verrucose, (46-)53.8(-60) x (30-)33.9(-40) µm.
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Rhizome wide-creeping, dorsiventrally flattened, up to 5 mm in diam., dorsally with 2 alternate rows of short phyllopodia up to 2 mm long, densely set with appressed scales; scales centrally dark brown with paler margins, peltate, lanceolate, up to 10 x 1.5 mm. Fronds hemidimorphic, fertile slightly longer and narrower than sterile, erect, up to 200 mm long. Stipe articulated to phyllopodia, adaxially shallowly sulcate, up to 38 x 1 mm, glabrous. Lamina herbaceous, simple, entire; sterile ovate-acute, up to 170 x 50 mm; fertile narrowly lanceolate, acute to cuneate, up to 155 x 30 mm, adaxially glabrous, abaxially with appressed scales along costae, scales up to 1.5 mm long. Costa adaxially convex, pronounced abaxially; venation obscure, reticulate, areolae with or without simple free included veinlets. Sori circular to oval, up to 2.2 mm in diam., positioned at a plexus of predominantly quaternary veins in a single row on either side of the primary vein or costa, up to 3 mm in diam., exindusiate; receptacle with simple or branched, paraphyses, up to 0.7 mm long.
Life form -
Growth form herb
Growth support epiphyte
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Root system rhizome
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Environment

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Soil texture 7-8
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Hardiness (USDA) 9-12

Usage

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Cultivation

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Images

Microgramma mauritiana unspecified picture

Distribution

Microgramma mauritiana world distribution map, present in Angola, Central African Republic, Côte d'Ivoire, Cameroon, Congo, Gabon, Ghana, Guinea, Guinea-Bissau, Equatorial Guinea, India, Kenya, Liberia, Madagascar, Mozambique, Mauritius, Malawi, Mayotte, Nigeria, Réunion, Sierra Leone, Sao Tome and Principe, eSwatini, Togo, Tanzania, United Republic of, Uganda, South Africa, Zambia, and Zimbabwe

Identifiers

LSID urn:lsid:ipni.org:names:17406210-1
WFO ID wfo-0001108679
COL ID 42X6R
BDTFX ID -
INPN ID 708632
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Craspedaria borbonica Goniophlebium owariense Polypodium mackenii Anapeltis owariensis Polypodium anguinum Microsorum owariense Polypodium owariense Microgramma mauritiana Polypodium myrtillifolium Microgramma owariensis Polypodium lycopodioides Polypodium ligustrifolium Polypodium lycopodioides var. myrtillifolium Polypodium mauritianum Anapeltis lycopodioides var. owariensis