Oxalis articulata Savigny

Oxalis articulé (fr), Oxalide articulée (fr)

Species

Angiosperms > Oxalidales > Oxalidaceae > Oxalis

Characteristics

Apparently stemless herb to 40 cm; stem ligneous, rhizomatous, brown, dark, more than 15 cm long, to 2 cm diam., tortuose, bearing the scars of the bases of stipules adnate to petioles of decayed leaves; roots tuberous, subligneous, cylin-dric, knobby or articulate, dark, thick, more than 10 cm long, 25 mm diam., branched, fibrous, to 15 cm long, sometimes with a long branch bearing a tuber at its apex. Leaves 3-30-fasciculate; leaflets widely obovate subcuneate or cu-neate, 5-30 mm long, 7-45 mm wide, slightly retuse or acute, incised to 1/5 Of its length, a purplish basal callus frequently present, the pubescence straight, ap-pressed, uniform, dense on both faces or only below, or shorter and loose; orange calli abundant near the margins, unequal, rarely scattered on the rest of the surface; stipules connate to the petiole, ovate or triangular, 4-16 mm long, 2-6.5 mm wide, narrowed towards the apex, the hairs appressed ascendent, ciliate; petioles ascendent, 13-30 cm long, densely appressed pubescent to glabrate with short appressed hairs; petiolule ca. 1/2 mm long, thick, densely pilose. Inflores-cences of umbelliform simple cymes, 2-5-flowered, bifid, asymmetric, multiflow-ered with up to 20 flowers or of bifid cymes composed of umbelliform cymes; peduncles taller than the foliage (2.5-40 cm) the pubescence similar to that of the petioles; bracts 2-3 mm long; bracteole 0.5-1(-2) mm long, situated at the base of the inflorescence, oblong or linear, appressed-pilose with 1-2 orange calli at the apex; pedicels long filiform, 1-5.5 cm long, articulate near the base. Flowers with the sepals linear-elliptic to linear 2.5-6.5 mm long, 1-2 mm wide, acute, the internal sepal obtuse, often with 3-4 unequal calli, densely appressed-pubescent,
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Perennial herb with stems not evident; rhizome stout, woody, irregularly nodulose-segmented to c. 15 cm long, to c. 2.5 cm diam., often covered with persistent old petiole-bases; bulbs and bulbils absent. Indumentum of simple eglandular hairs. Stipules membranous, tapering into petiole, the stipular wing inconspicuous, hairy. Leaves basal, crowded at apex of rhizome, trifoliolate; petiole (3–) 7–30 cm long, sparsely hairy; leaflets sessile, obcordate, usually 8–35 (–55) mm long, 10–45 (–60) mm wide, deeply notched (sinus to c. one-third leaflet length), green, sparsely pubescent above and below, margins ciliate, with basal tuft of hairs; lobes oblong to obovate, apices rounded and 8–16 mm apart; calli forming a marginal band, orange. Inflorescences usually umbelliform cymes, less commonly in irregular cymes, basal, (1–) 3–30-flowered; peduncles slightly longer than leaves, 12–35 cm long, sparsely strigose; pedicels 10–25 mm long, sparsely to moderately hairy. Bracts situated at base of pedicels, lanceolate to ovate, 2–2.5 mm long, with 2 elongated orange calli. Flowers tristylous (long-styled, mid-styled and short-styled). Sepals lanceolate, 3–5 mm long, green, with appressed hairs; calli 2, orange, apical. Petals oblique-obovate to oblong, 9–16 mm long, usually deep pink to magenta with darker veins, sometimes pale pink or rarely white, with band of appressed hairs outside. Stamens at 2 levels; filaments hairy, dilated and sometimes toothed in lower part, those of longest whorl 2–3 mm long. Ovary sparsely strigose. Styles densely hairy. Capsules not developed in Australia.
Clump-forming, hairy perennial; rhizomes short, thick, fleshy, sometimes with short offsets, rough from numerous lf base scars. Lvs 3-foliolate, in basal rosettes. Petiole (3)-7-30 cm long, hairy or nearly glabrous; stipular wing inconspicuous, membranous, hairy. Lamina of leaflets often unequal, sessile, usually 8-35-(55) × 15-(60) mm, broadly obcordate with narrow sinus to ⅓ lamina, with appressed hairs above and below, with basal tuft of hairs; calli orange and forming marginal band; lobes 2, rounded. Infl. to c. 35 cm tall, glabrate, a terminal cyme or panicle of (4)-7-35 fls; pedicels ± deflexed at first, later erect, very variable in length, with antrorse hairs. Bracts at base of pedicels 2-2.5 mm long, lanceolate to ovate, with 2 elongated orange calli. Sepals 3-5 mm long, ovate-elliptic or elliptic, with appressed hairs; calli 2, orange, terminal. Petals 9-16 mm long, oblique-obovate to oblong, usually rose above with darker veins and paler pink with band of appressed hairs outside, rarely white. Stamens in 2 whorls; filaments hairy, dilated and sometimes toothed in lower part, those of longest whorl 2-3 mm long. Styles usually much > longer stamen whorl at anthesis (if petals white, then much < longer stamen whorl), densely hairy. Capsule not seen.
the hairs straight; petals violaceous, obovate-oblong, clawed, connate near the middle, 2-3 times the length of the sepals, the areas exposed in bud covered with white sericeous appressed hairs; stamens with linear filaments, basally broad and abruptly narrowed about the middle, the longer stamens 3.5 mm long, pubescent, the shorter stamens 2 mm long, glabrous, connate to about 2/3, the anthers ovoid; pistils macro-, meso-and microstylous, ca. 5.5 mm long, the ovary pilose at least at the apex and back of the carpels, carpels 4-8-ovuled, the styles densely pilose, the stigma small, capitate. Capsule cylindric or oblong, acute, 8-11 mm long, the calyx to ?2 of its length, densely ascending appressed pubescent overall or only at the apex of the carpels, the carpels 4-8-seeded; seeds light brownish, ovoid or ellipsoid, acute at both ends, 1-1.25 mm long, 8-9-ribbed in zig-zag, transversally striate with 4-8 deep pits.
Herbs perennial, acaulous, rhizomes present, <thick, woody, irregularly nodulate-segmented, often covered with persistent petiole bases>, stolons absent, bulbs absent. Leaves basal; petiole 11–30 cm; leaflets 3, green to purplish abaxially, green adaxially, rounded-obcordate, 18–20 mm, <margins densely loosely ciliate>, lobed 1/5–1/3 length, <lobes apically convex>, surfaces evenly strigose-villous to strigose-hirsute, oxalate deposits in dots concentrated mostly toward margins or over whole surface. Inflorescences usually umbelliform cymes, less commonly in irregular cymes, 3–12-flowered; scapes 12–28 cm, sparsely strigose. Flowers heterostylous; sepal apices with 2 orange tubercles; petals usually purplish rose to red, rarely white, 10–14 mm. Capsules ovoid, 4–8 mm, sparsely strigose. 2n = 42.
A herb that has a thick, erect, woody underground stem or rhizome. It does not produce bulbs. It grows 30-40 cm high and spreads 30-40 cm wide. The leaves are made up of 3 leaflets. They are 25 mm across. These are covered with short downy hairs. The flowers have 5 free petals. These are pink or white. They are 18 mm across and held above the leaves.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination entomogamy
Spread autochory
Mature width (meter) 0.4 - 0.7
Mature height (meter) 0.2 - 0.28
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

A weed of gardens, roadsides other disturbed areas, and sometimes native vegetation.
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It is a warm temperate plant. It suits hardiness zones 8-10. Tasmania Herbarium.
Not known
Not known
Light 5-9
Soil humidity 4-6
Soil texture 3-6
Soil acidity 2-7
Soil nutriment -
Hardiness (USDA) 8-10

Usage

Various cultivars are grown as an ornamental or groundcover.
Uses environmental use medicinal ornamental
Edible flowers leaves
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by divisions or seedlings.
Mode divisions seedlings
Germination duration (days) 14 - 60
Germination temperacture (C°) 12 - 20
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -5
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Oxalis articulata habit picture by Bernard Fabier (cc-by-sa)
Oxalis articulata habit picture by Chiodaroli Federico (cc-by-sa)
Oxalis articulata habit picture by Thierry LE COM (cc-by-sa)

Leaf

Oxalis articulata leaf picture by celine Bilquey (cc-by-sa)
Oxalis articulata leaf picture by David Hocken (cc-by-sa)
Oxalis articulata leaf picture by Peter Demuro (cc-by-sa)

Flower

Oxalis articulata flower picture by Nigel Kingston (cc-by-sa)
Oxalis articulata flower picture by Bernard Fabier (cc-by-sa)
Oxalis articulata flower picture by Franz JULLIEN (cc-by-sa)

Distribution

Oxalis articulata world distribution map, present in Argentina, Australia, Bosnia and Herzegovina, Bolivia (Plurinational State of), Brazil, Colombia, Algeria, Ecuador, Spain, France, United Kingdom of Great Britain and Northern Ireland, Gibraltar, Greece, Croatia, Italy, Japan, Libya, Mexico, New Zealand, Panama, Korea (Democratic People's Republic of), Portugal, Uruguay, United States of America, and South Africa

Identifiers

LSID urn:lsid:ipni.org:names:374673-1
WFO ID wfo-0000387301
COL ID 75FDS
BDTFX ID 47102
INPN ID 111863
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Oxalis racemosa Oxalis tubistipula Acetosella platensis Oxalis canterai Oxalis lasiophylla Oxalis pseudostipulata Oxalis rubra Oxalis articulata f. halophila Oxalis floribunda Oxalis platensis Oxalis martii Oxalis arechavaletae Oxalis dumicola Oxalis rivalis Acetosella articulata Acetosella rubra Oxalis halophila Oxalis guttata Oxalis articulata f. guttata Oxalis articulata subsp. rubra Oxalis monticola var. sericea Oxalis floribunda subsp. floribunda Oxalis lasiopetala var. pubescens Oxalis articulata subsp. articulata Oxalis articulata subsp. nodulosa Oxalis articulata

Lower taxons

Oxalis articulata f. crassipes Oxalis floribunda subsp. ostenii