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Genus Convolvulus Family Convolvulaceae

Description: Perennial, or rarely annual herbs with trailing or twining stems.

Leaves simple, entire to deeply lobed, often hastate or sagittate, glabrous or with simple hairs.

Flowers axillary in 1–few-flowered cymes, bracteolate. Sepals 5, free, equal or subequal. Corolla funnel-shaped or campanulate, entire or slightly 5-lobed, mid-petaline band hairy [or rarely glabrous]. Stamens 5, filaments slightly unequal bearing low tubercles from base of corolla to above the point of attachment. Ovary ovoid, 2-locular with 2 ovules per loculus, glabrous; style 1 with 2 linear or oblong stigmatic lobes.

Capsule globose or ovoid, splitting longitudinally into 2–4 valves.

Distribution and occurrence: World: c. 250 species, cosmopolitan, mainly temperate & subtropical regions. Australia: c. 13 species (11 species endemic, 2 species naturalized). Bindweeds

Convolvulus eyreanus possibly occurs in the Far North Western Plains area.

Text by R. W. Johnson; updated by Peter G. Wilson, Dec 2020. Key modified by Peter G. Wilson from R.W.Johnson Fl. NSW and Wood, J.R.I., Williams, B.R.M., Mitchell, T.C., Carine, M.A., Harris, D.J. & Scotland, R.W. (18 June 2015), A foundation monograph of Convolvulus L. (Convolvulaceae). Phytokeys 51: 56-57
Taxon concept:

 Key to the species 
1Leaves subtending flowers hastate or sagittate; lamina mostly entire or irregularly crenate; basal lobes sometimes with 2 teeth or lobes (but lobes never ascending)2
Leaves subtending flowers crenate, serrate or shallowly lobed; base auriculate or, if more or less hastate, then ascending lobes present7
2Sepals to 4 mm long with a rounded to truncate, emarginate apex3
Sepals 4–7 mm long with an acute to rounded, apiculate apex
                       Back to 1
3Leaves glabrous or with a few weak, erect hairs; petals 15–30 mm long; sepals 3–4 mm longConvolvulus arvensis
Leaves sparsely to moderately hairy with appressed hairs; petals 5–10 mm long; sepals mostly < 3 mm long
                       Back to 2
Convolvulus microsepalus
4Sepals and older stems with mostly spreading hairs; flowers usually solitaryConvolvulus angustissimus
Sepals and older stems with appressed to ascending, short or crisped hairs; flowers 1–3 in a 1-sided dichasium
                       Back to 2
5Fruiting pedicels recurved; petals to 10 mm longConvolvulus graminetinus
Fruiting pedicels straight to sinuate; petals > 10 mm long
                       Back to 4
6Lamina ovate or oblong with entire marginsConvolvulus remotus
Lamina cordate-deltoid with subentire to distinctly crenate margins
                       Back to 5
Convolvulus farinosus
7Central lobe of lamina distinctly crenate, sericeous; basal lobes not well developed; fruiting pedicels straight; seeds with a narrowly winged marginConvolvulus crispifolius
Central lobe of lamina somewhat crenate to entire, glabrous to densely hairy but never sericeous; basal lobes often well developed; fruiting pedicels straight or recurved; seeds unwinged or wing narrow and more or less discontinuous
                       Back to 1
8Fruiting pedicels straight to sinuate9
Fruiting pedicels distinctly recurved
                       Back to 7
9Petals 10–16 mm longConvolvulus erubescens
Petals up to 9 mm long
                       Back to 8
10Stems slender; seeds coarsely tuberculate, < 3.5 mm longConvolvulus clementii
Stems coarse; seeds with many small tubercles, 3.5–4 mm long
                       Back to 9
Convolvulus tedmoorei
11Leaves densely silvery appressed-hairyConvolvulus wimmerensis
Leaves glabrous to moderately hairy; hairs various but not silvery
                       Back to 8
12Seeds finely and densely tuberculateConvolvulus graminetinus
Seeds smooth or with ridge-like tubercles
                       Back to 11
13Seeds smooth or with low, reticulate, more or less continuous ridgesConvolvulus angustissimus
Seeds with many short, wavy ridges
                       Back to
Convolvulus recurvatus

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