Davallia tasmanii Cheeseman
Details
Davallia tasmanii Cheeseman, Trans. & Proc. New Zealand Inst. 23: 416 (1891)
Nomenclature
Cheeseman
Cheeseman
1891
416
D. tasmani
illegitimate
ICN
Davallia tasmanii Cheeseman
species
Davallia tasmanii
Lectotype (selected by von Konrat et al. 1999): Three Kings Islands, T.F. Cheeseman, Aug. 1887, AK 419! Isolectotypes AK 10811!, 10812!, 10814!, WELT P007162!
Classification
Descriptions
Davallia tasmanii Cheeseman
Primarily terrestrial, creeping fern with long, branched dorsiventral rhizomes, rooting at intervals, rhizome densely clothed with scales, diameter without scales 2.2–11 mm. Mature rhizome scales peltate, triangular-ovate, gradually tapering to apex, bicolorous, centre red-brown, margins yellowbrown or paler becoming darker towards base, 13– 16.5 mm long and 2.7–2.9 mm wide, margin fringed with multiseptate hairs and toothed from the base to the apex or with multiseptate hairs restricted to th e apex of the scale. Stipe 1.7–30 cm long, 0.8–2 mm diameter, mature stipe stout, rigid, glabrous except for scales at the base, adaxially grooved, articulated to the rhizome; stipes spaced along the rhizome in two scattered rows 0.5–5 cm apart or sometimes more. Lamina 2.4–28 cm long and 2.9–29 cm wide, tripinnate and then pinnatifid, deltoid-pentangular, often leathery, almost glabrous, lowest primar y pinna longer and broader than others, the basal basiscopic secondary pinnae greatly enlarged, 0.6– 8.7 cm long and 0.3–6.1 cm wide. Larger ultimate sterile segments inciso-lobate to toothed, often each lobe or tooth indented or rounded, veins free, simply forked so that each tooth or lobe is supplied with a vein which does not reach margin, hydathodes sometimes present, false veins either absent or, when present, faint to conspicuous, between true veins. Larger ultimate fertile segments bearing one to several sori per segment, often narrowed below and distinctly dilated above, to accommodate sori, univeined forking into veinlets with sori regularly at junction of veinlets; apex of lamina bearing single sorus, truncate, notched or bidentate. Indusia cupshaped, slightly longer than wide, c. 1.6 mm × 1.2 mm sometimes reaching 3 mm long and 1.4 mm wide. Spores monolete, bilaterally symmetrical, elliptical with a verrucate to tuberculate sculpture .
Taxonomic concepts
Davallia tasmanii Cheeseman
Davallia tasmanii Cheeseman
Collections
Notes
typification
Lectotype (selected by von Konrat et al. 1999): Three Kings Islands, T.F. Cheeseman, Aug. 1887, AK 419! Isolectotypes AK 10811!, 10812!, 10814!, WELT P007162!
Metadata
12898ae4-e7a0-439f-b9c6-53e3cf5b4990
scientific name
Names_Plants
1 January 2000
27 August 2018