Persicaria attenuata subsp. attenuata (R.Br.) Soják APNI* Synonyms: Polygonum articulatum R.Br. APNI*
Description: Stout decumbent herb 60–100 cm high; stems glabrous or with very scattered long hairs; stalked glandular hairs sometimes present on stems, inflorescence branches and leaves.
Leaves narrow-ovate, ± falcate, 8–20 cm long, 15–50 mm wide, usually at least the margins and main veins with long white appressed hairs, lamina glabrous to subvillous, lower surface usually with sessile glands, less often glandular above; petiole 10–40 mm long; ocrea glabrous or sparsely hairy, with cilia 0–3 mm long.
Spikes elongate-cylindrical, very dense, 4–11 cm long, 6–10 mm diam. Perianth segments 2.8–3.8 mm long, white.
Achene lenticular, 2.0–2.5 mm long, 2.0–2.4 mm diam., dark brown to blackish.
Distribution and occurrence: Scattered occurrences, in and beside waterbodies. Grows beside and in open swamps, dams and streams.
NSW subdivisions: NC, CWS, NWP, SWP, NFWP, SFWP
Other Australian states: Qld W.A. S.A. N.T.
A generally hairy, robust perennial, at maturity forming large patches on and beside water, with long floating, rather inflated stems that have the capacity to root at the lower nodes.
Text by KL Wilson (Dec 2012); edited KL Wilson (Jan 2014); edited SF McCune (June 2023)
Taxon concept: Flora of NSW 1 (1990)
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.
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