Elaphoglossum acrostichoides (Hook. & Grev.) Schelpe
Synonyms |
Vittaria acrostichoides Hook. & Grev. |
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Common name |
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Description |
Depending on exposure and habitat this species may be very variable in size and shape. Rhizome creeping, 4-8 mm in diameter; rhizome scales pale brown to black, 3-5 mm long, deltate-ovate to lanceolate, margin entire or with filiform outgrows; phyllopodia present, 1-2 cm long, dark brown. Fronds simple, closely spaced to apart, erect or arching, herbaceous to coriaceous, weakly to strongly dimorphic. Sterile fronds: 20-50 cm long, stipe up to 15 cm long, brown to stramineous when dry, grooved ventrally, articulated near the base, glabrous to lightly set with entire, pale brown scales, scales ovate, 4-5 mm long, orange-tan, with small, irregular processes; stipe of sterile fronds on average half as long as that of fertile fronds. Sterile lamina obovate to elliptic to lanceolate in outline, apex rounded, base tapering, 3-35 × 1-3.6 cm, dark green and glabrous above, paler and with a few dot-like scales below, margin entire to wavy; costa prominent, with scattered to sparse lanceolate to ovate-lanceolate scales 2-3 mm long, with irregular processes; veins 1 mm apart, at 80° angle to costa; hydathodes absent. Fertile fronds: same shape and length as sterile fronds but with a longer stipe and a smaller lamina; lamina narrowly elliptic, 23 x 2 cm, intersporangial scales absent. Sporangia covering the undersurface of the lamina except for the midrib. |
Notes | |
Derivation | acrostichoides: similar to Acrostichum, a fern belonging to the Parkeriaceae; members of this family are found in aquatic or swampy habitats. |
Habitat | Variable species occuring in a wide range of habitats: shade in forest, crevices in rocky outcrops in high-altitude grassland, shaded cliff faces near waterfalls, moss-covered earth banks along streams and in montane scrub. |
Distribution worldwide | Africa, Madagascar, Comoro Isl., Réunion, São Tomé. |
Distribution in Africa |
Angola, Burundi, Cameroon, Congo, Dem. Republic of Congo, Equatorial Guinea (incl. Bioko), Ethiopia, Ghana, Guinea, Ivory Coast, Kenya, Lesotho, Liberia, Malawi, Mozambique, Rwanda, South Africa, Swaziland, Tanzania , Uganda, Zimbabwe. |
Growth form |
Epiphytic, lithophytic. |
Literature |
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