Persicaria attenuata (R.Br.) Soják APNI* Synonyms: Polygonum attenuatum 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, variably pubescent, 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 associated with water bodies in inland regions and on the North Coast. Also in tropical and subtropical Australia; Vanuatu, New Caledonia, Malesia, India to Taiwan, Africa. Grows on margins of open swamps 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. Only the typical subspecies occurs in NSW.
Text by K. L. Wilson (1990); edited KL Wilson (Dec 2012); edited SF McCune (Jun 2023)
Taxon concept: Flora of NSW 1 (1990)
| N.S.W. occurrences are: subsp. attenuata |
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***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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