Classification
Class
Magnoliopsida Brongn.
Order
Poales Small
Family
Sparganiaceae Hanin
Genus
Sparganium L.
 Nomenclature
Scientific Name:
Sparganium subglobosum Morong (1888)
Synonymy:
  • = Sparganium antipodum Graeb. (1900)
Vernacular Name(s):
Bur-reed; Creeping bur-reed; Mārū
 Description

Plants to c. 70 cm. tall. Rhizome long, slender. Lvs mostly from base c. 30–100 × 1 cm., ± erect; sheathing base channelled; lamina ± keeled, subrhomboid in T.S.; longitudinal nerves obvious; incomplete cross walls occ., thick, green; tip obtuse. Peduncle c. 2 mm. diam., us. shorter than lvs; lower bracts long, foliaceous. Infl. simple to few-branched; main axis with 1–3 female capitula near base, followed by up to 10 male capitula; lateral axes often with only male, but sts with 1–2 female capitula below; capitula sessile and either strictly axillary or without bracts. Fls white. Male capitula c. 1 cm. diam., fls ∞; stamens c. 3 mm. long, filaments much > per.; anthers 2–3 times as long as broad. Female capitula to 1.5 cm. diam., fls c. 60; per.-scales 4–8, the inner ones smaller; ovary c. 4 mm. long, narrow-fusiform; style short; stigma oval, c. ½ style-length. Fr. c. 6 × 3 mm., sessile, obovoid.

[From: Moore and Edgar (1970) Flora of New Zealand. Volume 2.]

 Biostatus
Indigenous (Non-endemic)
 Phenology

Flowering: Nov.–Mar.; Fruiting: Jan.–Apr.

 Bibliography
de Lange, P.J.; Rolfe, J.R.; Barkla J.W.; Courtney, S.P.; Champion, P.D.; Perrie, L.R.; Beadel, S.N.; Ford, K.A.; Breitwieser, I.; Schönberger, I.; Hindmarsh-Walls, R.; Heenan, P.B.; Ladley, K. 2018: Conservation status of New Zealand indigenous vascular plants, 2017. New Zealand Threat Classification Series. No. 22. [Not Threatened]
de Lange, P.J.; Rolfe, J.R.; Champion, P.D.; Courtney, S.P.; Heenan, P.B.; Barkla, J.W.; Cameron, E.K.; Norton, D.A.; Hitchmough, R.A. 2013: Conservation status of New Zealand indigenous vascular plants, 2012. New Zealand Threat Classification Series 3. Department of Conservation, Wellington. [Not Threatened]