Althenia bilocularis (Kirk) Cockayne

Caption:

Details

Name scientific

Althenia bilocularis (Kirk) Cockayne

Preferred name

Althenia bilocularis (Kirk) Cockayne

Taxonomy reference

Ito, Y.; Tanaka, N.; García-Murillo, P.; Muasya, A.M. 2016: A new delimitation of the Afro-Eurasian plant genus Althenia to include its Australasian relative, Lepilaena (Potamogetonaceae)–evidence from DNA and morphological data. Molecular Phylogenetics and Evolution 98: 261–270.

Biostatus

Origin

Occurrence

Georegion

Schema

Biostatus source

Comment

Indigenous, non-endemic

Wild

New Zealand

Political Region

Nomenclature

Authors

(Kirk) Cockayne

Original authors

Kirk

Combination authors

Cockayne

Publication place

Speight, R.; Wall, A.; Laing, R.M. (ed.) 1927: Natural History of Canterbury: a series of articles on the early history of the province and on the history of scientific investigation, up till 1926, as well as on some results of this investigation . Philosophical Institute of Canterbury, Christchurch.

Year published

1927

Publication page

126

Nomenclatural code

ICN

Basionym

Lepilaena bilocularis Kirk

Taxonomic rank

species

Canonical form

Althenia bilocularis

Classification

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Alismatales

Family

Potamogetonaceae

Genus

Althenia

Species

bilocularis

Synonyms

Lepilaena bilocularis Kirk

Descriptions

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

Lepilaena bilocularis Kirk

Description

2n = 12

Moore, L.B.; Edgar, E. 1970: Flora of New Zealand. Vol. II. Indigenous Tracheophyta: Monocotyledones except Gramineae. Botany Division DSIR, Wellington.

Submerged summer-green herb. Rhizome to 1 mm. diam., internodes 1–2 cm. long. Stems occ. branched, to 20 cm. long, filiform; internodes c. 1–4 cm. long. Lvs regularly alt.; lf-base at first sheathing stem, to 4 mm. long, fibrous in age; lamina c. 2.5–3.5 cm. × 1 mm., 1-(or 3-) nerved, entire, tip squarely truncate, nerve (or nerves) shortly excurrent. Fl. enclosed within lf-bases. ♂ on pedicel that elongates to 5 mm.; per.-segs mucronate, enclosing only extreme base of anther; stamen solitary; anther 2 × 0.6 mm., sessile, curved; pollen sacs 2, connective excurrent in short, sharp mucro. ♀ shortly pedicellate; per.-segs narrow-oblong, ± laciniate, c. 1.5 × 0.5 mm.; carpels us. 3, occ. 4, shortly stipitate; style narrower than ovary, stigma obliquely funnel-shaped with long-fimbriate margins. Achene c. 1.5–2 × 0.5 mm., asymmetrically oblong, yellow, smooth, narrowing above to style-remnant c. 1 mm. long. 2n = 12.