Oxalis chnoodes Lourteig

Downy Wood-sorrel

Phytologia 42: 174 (1979) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Herb with stems creeping or decumbent, to 40 cm long, sparsely to densely hairy, hairs spreading and/or retrorse; taproot absent; bulbils absent. Leaves cauline, fasciculate, 3-foliolate; leaflets subsessile, obovate-cuneate, 4–14 mm long, 4–16 mm wide, bilobed, green, sparsely to densely pubescent above, more densely hairy below, margins ciliate, sinus to c. one-fifth leaflet length, lobes oblong to obovate, apices rounded, 2–12 mm apart; petioles usually 0.5–4 cm long, densely covered with spreading hairs; stipules inconspicuous to moderate-sized, c. 1.5 mm long, rounded to truncate, often hidden by apical hairs when young, usually densely hairy, densely ciliate. Inflorescences axillary, flowers 1–4 per peduncle, usually held a little above leaf level; peduncle densely covered with spreading hairs; pedicels erect or reflexed in fruit (but capsule erect). Sepals elliptic, 3–4.5 mm long, ciliate; petals 6–12 mm long, yellow. Styles long. Capsule 7–9 mm long, 3–4 mm diam., broad ellipsoid to ellipsoid, retrorse-hairy with short simple hairs and longer overlying patent septate hairs; seeds 1.5–2 mm long, transversely ribbed with 7–11 ribs, the ribs narrow, grooves wide and deep, brown, uniformly coloured or ribs with faint greyish lines or blotches. Flowers May–Dec.

EGU, HSF, VAlp. Also Qld, NSW. New Guinea, Bismarck Archipelago. At the Tali Karng site it grows along a creek. Outside Victoria it grows in a variety of different forest and woodland types, as well as on rocky sites, commonly occuring away from the coast.

A poorly known, and seldom collected species in Victoria, known from eight collections. In Victoria found from Grampians National Park, an 1861 Dandenong Ranges collection, Baw Baw National Park, and extending to East Gippsland. Possibly more widespread in Victoria than herbarium specimens indicate due to the likely confusion with the hairiest forms of the variable Oxalis corniculata, and with O. exilis on account of the relatively short capsules. O. chnoodes  can usually be recognised by its hairiness (hence the name, which is derived from Greek for velvety), the young shoots and petioles in particular usually being densely hairy. It differs from O. corniculata in its shorter and more stout fruit, usually densely hairy leaf lower surfaces, smaller stipules, and the stems which do not root at the nodes. It differs from O. exilis in usually having densely hairy leaf lower surfaces, smaller stipules, and stems which do not root at the nodes, and which are sparsely to densely hairy with spreading or retrorse hairs. Many unvouchered site records attributed to O. chnoodes are therefore likely to be referable to O. corniculata and/or O. exilis. O. chnoodes may also be confused with and difficult to distinguish from O. radicosa, especially specimens lacking mature fruit. O. chnoodes differs from O. radicosa in lacking a stout taproot, which is present in O. radicosa. Sykes (2009), however, notes that in New Zealand O. chnoodes has a moderately stout taproot, whereas Australian plants appear to lack a taproot. O. chnoodes also differs from O. radicosa in usually having relatively shorter capsules, and long and trailing stems, whereas the stems in O. radicosa are usually erect or ascending. The size of stipules is more variable in O. chnoodes, whereas in O. radicosa the stipules are inconspicuous and less than 1 mm long.

Source: Conn, B.J.; Jeanes, J.A.; Richards, P.G. (1999). Oxalidaceae. In: Walsh, N.G.; Entwisle, T.J. (eds), Flora of Victoria Vol. 4, Cornaceae to Asteraceae. Inkata Press, Melbourne.
Updated by: Val Stajsic, 2018-05-01
 
References

Sykes, W.R. (2009). The Oxalis corniculata group, New Zealand Journal of Botany 47: 107-113.

Hero image
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Rosanae
order Oxalidales
family Oxalidaceae
genus Oxalis
Higher taxa

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Oxalis chnoodes in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Oxalis chnoodes in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
East Gippsland Uplands present native
Highlands-Southern Fall present native
Victorian Alps present native

State distribution

Distribution map
State
Northern Territory
Queensland
New South Wales
Victoria