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Genus Vittadinia Family Asteraceae

Description: Annual or perennial herbs or small shrubs, bristly to cottony with septate hairs, minute glandular hairs also present.

Leaves cauline, alternate, numerous, flat to conduplicate, rarely terete, attenuate bases.

Inflorescences terminal on branches; involucral bracts imbricate, usually linear to elliptic; receptacle convex, naked, pitted. Ray florets female, 1–3-seriate. Disc florets tubular, 5-merous, bisexual, corolla usually shorter than pappus; staminal filaments attached in upper third of tube; anthers and style with terminal appendages.

Achenes flattened, with opposing faces separated by marginal ridge, facial ribbing sometimes present, obovate to oblanceolate, variously hairy but always with a basal hair tuft; pappus of numerous free bristles, usually barbellate and in many rows, far exceeding the involucre.

Distribution and occurrence: World: 29 species, Australia, New Caledonia, New Zealand, New Guinea. Australia: 27 species (25 species endemic), all States.

Text by J. Scott & J. Everett
Taxon concept:

 Key to the species 
1Achenes without facial ribbing2
Achenes with facial ribbing6
2Achenes with prominent marginal ribs3
Achenes without prominent marginal ribs
                       Back to 1
3Achenes narrowly constricted in the lower half, truncate at the apex below the pappus; pappus in many rowsVittadinia eremaea
Achenes gradually tapered to the base, constricted at the apex; pappus in 1 or 2 rows
                       Back to 2
4Stems and leaves with mainly septate hairs, glandular hairs minute and obscureVittadinia hispidula
Stems and leaves with mainly glandular hairs, septate hairs mainly restricted to margins and midrib of abaxial leaf surface
                       Back to 3
Vittadinia arida
5Pappus plumose; achenes evenly pubescentVittadinia pterochaeta
Pappus barbellate; achenes with hairs denser in the centre or glabrescent
                       Back to 2
Vittadinia pustulata
6Facial ribs converging below the apex, fusing with marginal ribs, not all reaching the apex, the apex never truncate7
Facial ribs not or scarcely converging, almost all ribs continued to the apex, the apex often more or less truncate
                       Back to 1
7Achenes with glandular hairs especially at the apexVittadinia cervicularis
Achenes without glandular hairs
                       Back to 6
Vittadinia sulcata
8Marginal ribs of achenes glabrous; leaves linear or if oblanceolate then with narrow-acuminate lobes and attenuate base9
One or both of the marginal ribs with hairs; leaves cuneate, obovate, oblanceolate or spathulate; lobes when present obtuse or shortly acute
                       Back to 6
9Achene faces with clavate or subclavate hairs towards the apex10
Achene faces with slender hairs towards the apex
                       Back to 8
Vittadinia tenuissima
10Achenes with appressed hairs on the lower half, the upper half with subclavate hairs between the ribsVittadinia muelleri
Achenes without hairs on the lower half, the upper half with clavate hairs on the ribs
                       Back to 9
Vittadinia blackii
11Hairs on the upper half of the achenes conspicuously clavate, hairs on the marginal ribs much smallerVittadinia condyloides
Hairs on the upper half of the achenes with acutely bifid apices, never clavate, hairs on the marginal ribs scarcely smaller
                       Back to 8
12Heads usually more than 6 mm long; leaves cuneate to oblanceolate, without a very narrow base; the upper part entire or with 2 small lateral lobes13
Heads less than 6 mm long; leaves broad-spathulate with a very narrow base, the upper part dissected
                       Back to 11
Vittadinia dissecta
13Indumentum hirsute or stiffly semi-appressedVittadinia cuneata
Indumentum soft, white-tomentose
                       Back to 12
Vittadinia gracilis

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