Mairia robusta (Zinnecker) J.C.Manning & Goldblatt

Species

Angiosperms > Asterales > Asteraceae > Mairia

Characteristics

Rosulate perennial herb, up to 30 cm high. Leaves with blade narrowly to broadly obovate or narrowly to broadly elliptic, 30-130 x 15-40 mm, narrowed to a broad petiole-like base; apex obtuse or acute; margin crenate in upper half, sometimes entire, but then with some peg-like crenulations; adaxial surface lanate or sometimes canescent, glabrous at maturity, indumentum of abaxial surface consisting of 2 layers of hairs: densely and persistently softly white or pinkish canescent-cobwebby overlaid with longer lanate hairs, leaf surface not visible through indumentum, discolorous. Scape usually 1 per rosette, 1-headed, up to 26 cm long, unbranched, with similar indumentum as abaxial leaf surfaces, bracteate, bracts linear to linear-triangular, up to 45 mm long, decreasing in size upwards, with similar indumentum as leaves. Involucre campanulate, up to 35 mm in diameter. Involucral bracts in 5 or 6 series, all ±linear, ±11.5-17.0 x 0.8-1.5 mm, apices purplish, acute to very long acuminate-filiform, with similar indumentum as abaxial leaf surfaces or only densely lanate, bases of inner bracts glabrescent to glabrous. Ray florets purplish pink, pink or white, limb up to 30 mm long, 3-lobed, tube 4.5-5.5 mm long, glandular hairy. Style 4.5-5.5 mm long; style branches linear, 1.0-1.4 mm long. Staminodes absent. Cypsela and pappus as in disc florets. Disc florets many, tube 5.5-6.0 mm long, glandular hairy; lobes ±1 mm long. Anthers ±2 mm long, with triangular apical appendages, ±0.5 mm long. Style 5.5-6.0 mm long; style branches linear, 1.0-1.5 mm long; with deltoid apical appendages. Cypselae cylindrical to fusiform, occasionally obovate, ±3.5-4.4 x 0.9-2.0 mm, brown, distinctly 4-or 5-ribbed, ribs prominently raised, mostly dark brown; with many, yellow, shiny glands and dense sericeous twin hairs 0.4-0.5 mm long, apices deeply cleft, almost equal in length; epicarp smooth. Pappus biseriate, outer series of free barbellate bristles, 0.5-3.5 mm long, white to straw-coloured, alternately arranged to inner series; inner series of plumose bristles 6.7-7.0 mm long, naked or barbellate and fused in a ring basally, white to straw-coloured, longer than disc florets. Flowering time: sporadic records, June, October and December, after fire.
Life form perennial
Growth form herb
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Sexuality hermaphrodite
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Mature height (meter) 0.3
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Cultivation

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Images

Mairia robusta unspecified picture

Distribution

Mairia robusta world distribution map, present in South Africa

Identifiers

LSID urn:lsid:ipni.org:names:77132407-1
WFO ID wfo-0001337026
COL ID 3XJPL
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Mairia robusta Mairia hirsuta subsp. robusta