Asplenium obtusatum G.Forst.

Caption:

Details

Name scientific

Asplenium obtusatum G.Forst., Fl. Ins. Austr. 80 (1786)

Preferred name

Asplenium obtusatum G.Forst.

Taxonomy reference

Brownsey, P.J. 1977: A taxonomic revision of the New Zealand species of Asplenium. New Zealand Journal of Botany 15(1): 39–86.

Biostatus

Origin

Occurrence

Georegion

Schema

Biostatus source

Comment

Indigenous, non-endemic

Wild

New Zealand

Political Region

Brownsey, P.J.; Smith-Dodsworth, J.C. (2000)

Nomenclature

Original authors

G.Forst.

Authors

G.Forst.

Publication place

Forster, J.G.A. 1786: Florulae Insularum Australium Prodromus. Dietrich, Göttingen.

Year published

1786

Publication page

Nomenclatural code

ICN

Basionym

Asplenium obtusatum G.Forst.

Taxonomic rank

species

Canonical form

Asplenium obtusatum

Etymology

From the Latin obtusatus (rounded, obtuse), a reference to the shape of the pinnae.

Typification

Lectotype (selected by Brownsey 1977): New Zealand, Messrs Forster, BM 001048382!

Brownsey, P.J. 1977: A taxonomic revision of the New Zealand species of Asplenium. New Zealand Journal of Botany 15(1): 39–86.

Classification

Kingdom

Plantae

Phylum

Tracheophyta

Class

Polypodiopsida

Order

Polypodiales

Family

Aspleniaceae

Genus

Asplenium

Species

obtusatum

Subordinates

Vernacular names

Language of use: English

Language of use: Māori

Synonyms

Descriptions

Allan, H.H. 1961: Flora of New Zealand. Vol. I. Indigenous Tracheophyta: Psilopsida, Lycopsida, Filicopsida, Gymnospermae, Dicotyledones. Government Printer, Wellington.

Asplenium obtusatum G.Forst.

Description

Rhizome stout, branched, shortly creeping or ascending, often forming hard woody mass, densely clad in pale brown translucent linear-ovate-attenuate paleae c. 2 cm. long; stipites crowded to approximate, with dense tuft of paleae at base. Stipes 5-15 cm. × 2-5 mm., dark brown, with scattered shorter paleae. Rhachis stout, sparingly to rather densely paleate, very narrowly winged, with 8-30 subopp. lateral pinnae. Lamina ovate to oblong to deltoid, 6-30 × 3-10 cm., thick, fleshy; margins cartilaginous; veins simple or forked from near base, distinct to obscure. Pinnae (2)-4-6 cm. × 5-15-(20) mm., ovate-oblong to oblong, obtuse, obliquely cuneate at base, shortly stalked, dull green, crenate-serrate, ± paleate on veins and veinlets, sts slightly lobed near base. Sori cop., distinct to confluent, about 15 pairs, linear-oblong, 5-10 mm. long; indusium firm.

Allan, H.H. 1961: Flora of New Zealand. Vol. I. Indigenous Tracheophyta: Psilopsida, Lycopsida, Filicopsida, Gymnospermae, Dicotyledones. Government Printer, Wellington.

Asplenium obtusatum var. obliquum (G.Forst.) Hook.f.

Description

Stipes up to 50 cm. long; paleae ovate-lanceolate; pinnae 6-8 cm. × 7-20 mm., subacute to acute, serrate, more obliquely cuneate, more distinctly stalked.

Brownsey, P.J. 1977: A taxonomic revision of the New Zealand species of Asplenium. New Zealand Journal of Botany 15(1): 39–86.

Asplenium obtusatum G.Forst.

Description

Rhizome stout, often forming a hard woody mass above ground, bearing brown, shiny, ovate, acuminate scales up to 15 × 4 mm. Stipes 2-30 cm long, dark brown at base, green above, stout, covered in ovate or narrowly triangular scales with acute or acuminate apices. Laminae ovate to lanceolate, 4-40 × 2-20 cm, dull green, very thick and fleshy, pinnate. Raches green, stout, prominently grooved and scaly. Pinnae 4-18 pairs, narrowly ovate to oblong, obtuse to acute, crenate-serrate to ± entire, cuneate at base, 10-100 × 7-25 mm, scaly on the underside. Sori up to 10 mm long, not reaching to lamina edge. Perispore of spores slightly winged but with few crests or ridges (Fig. 29E-H).

Brownsey, P.J. 1977: A taxonomic revision of the New Zealand species of Asplenium. New Zealand Journal of Botany 15(1): 39–86.

Asplenium obtusatum G.Forst. subsp. obtusatum

Description

Stipes 4-30cm long, covered in ovate scales (Fig. 9A-E). Laminae usually ovate, 6-40 × 5-20 cm. Pinnae 5-15 pairs, 20-100 × 10-25 mm. Spores (35)40-43(49) mcm long, (21)24-27(33) mcm wide (5 populations).

Dawson, M.I. 2008: Index of chromosome numbers of indigenous New Zealand vascular plants.