Dryopteris filipaleata J.P.Roux

Dryopteridaceae, JP Roux, M Shaffer-Fehre, B Verdcourt. Flora of Tropical East Africa. 2007

Type

Tanzania, Morogoro District, Uluguru mountains, Mwere valley, Faden et al. 70/ 596 [BOL!, holo. (2 sheets); K!, iso. (2 sheets)]

Morphology General Habit

Terrestrial.

Vegetative Multiplication Rhizomes

Rhizome short-decumbent, up to 12 mm in diameter, with closely set stipe bases and ferrugineous to castaneous linear to narrowly lanceolate scales up to 15 × 5 mm, acuminate, irregularly set with scattered capitate glands and long outgrowths

Morphology Leaves

Fronds tufted, suberect to arching, up to 1.1 m long.

Morphology Leaves Stipes

Stipe proximally castaneous, stramineous higher up, up to 61 cm long and 7 mm in diameter, with proximally dense and distally sparse ferrugineous scales up to 18 × 6 mm.

Morphology Leaves Leaf lamina

Lamina ovate to broadly ovate, up to 59 × 43 cm, 2-pinnate-pinnatifid to 3-pinnate.

Morphology Leaves Rachis

Rachis stramineous, initially densely scaly, glabrescent, scales ferrugineous to castaneous, linear to filiform, up to 4 × 0.5 mm, irregularly denticulate.

Morphology Leaves Pinnae

Pinnules petiolate, increasingly more broadly attached and basiscopically decurrent along pinna-rachis towards pinna apex, up to 78 × 26 mm, proximal basiscopic pinnules slightly basiscopically developed, narrowly lanceolate to oblongacuminate; costa narrowly winged, with sparse scales up to 2.2 × 0.1 mm; segments and lobes up to 15 × 7 mm, ovate-obtuse to oblong-obtuse, basiscopically decurrent, shallowly lobed to denticulate, adaxially glabrous or with few hairs and filiform scales along costa, abaxially sparsely set with moniliform hairs up to 0.6 mm long on and between veins Pinnae up to 13 stalked pairs, increasingly more broadly attached and basiscopically decurrent along rachis towards lamina apex, basal pair longest and mostly conspicuously basiscopically developed, inaequilaterally triangular, ovate, oblong-acuminate to lanceolate, up to 27 × 13.5 cm, those higher up mostly near symmetrical, with up to 7 pinna pairs; pinna-rachis narrowly winged towards apex, with some linear to filiform scales up to 3 × 0.3 mm.

Morphology Reproductive morphology Sori

Sori predominantly 2-seriate along pinnules, 2-seriate on lobes in larger plants, medial to inframedial on predominantly anadromous vein branches; exindusiate; sporangium stalk simple, glandular or haired

Morphology Reproductive morphology Spores

Spores with low reticulate ridged and bulges, 32–54 × 18–34 µm.

Ecology

Moist evergreen forests, often along streambanks; 1250—2000 m

Conservation

Restricted in distribution, but appears not to be threatened.

Distribution

Range: Restricted to the mountainous areas of tropical East Africa Flora districts: K4 K5 T6