Dennstaedtia
J. Bot. (Schrader) 1800(2): 124. 1802 [Named after A. W. Dennstaedt, 1776.
| Taxon | Illustrator ⠉ | |
|---|---|---|
 | Hypolepis repens Odontosoria clavata Dennstaedtia punctilobula | John Myers John Myers John Myers |
Plants terrestrial, often forming colonies. Stems subterranean, long to short-creeping; hairs dark reddish-brown, jointed. Leaves clustered or scattered, erect to arching, ovate to lanceolate to deltate, 0.4–3 m. Petiole glabrous to pubescent, usually without prickles, often with stem buds near base; vascular-bundles 1–2, arranged in U or O-shape in cross-section. Blade 2–4-pinnate; rachis without prickles; nectaries absent. Segments pinnately divided, ultimate segments ovate to lanceolate, margins dentate or lobed. Veins free, pinnately branched. Sori marginal at vein tips, distinct, round or cylindric; indusia formed by fusion of true indusium and minute blade tooth to form circular or slightly 2-valvate cup. Spores tetrahedral-globose, trilete (rarely monolete), tuberculate or ridged. x = 34, 46, 47.
Distribution
Worldwide, mostly tropical
Discussion
Species ca. 70 (3 in the flora).
Selected References
Key
| 1 | Blades yellow-green or pale green, mostly 2-pinnate-pinnatifid, leaves usually less than 1 m. | Dennstaedtia punctilobula |
| 1 | Blades dark green, 3-pinnate, leaves 1–2(–3) m. | > 2 |
| 2 | Basal segments of pinnules alternate; blades dull; indusia globose; Texas. | Dennstaedtia globulifera |
| 2 | Basal segments of pinnules opposite; blades lustrous; indusia tubular or cylindric; Florida. | Dennstaedtia bipinnata |