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Cyanthillium cinereum

Family

Asteraceae

Botanical Name

Cyanthillium cinereum (L.) H.Rob.

Robinson, H.E. (1990) Proceedings Biological Society Washington 103: 252. Type: ?.

Synonyms

Vernonia cinerea (L.) Less., Linnaea 4: 291(1829), Type: ?. Conyza cinerea L., Species Plantarum: 862(1753), Type: ?.

Common name

Vernonia

Stem

Usually flowers and fruits as a herb but occasionally flowers as a shrub about 1 m tall.

Leaves

Stems, twigs, petioles and leaves densely clothed in white woolly hairs. Leaf blades about 2.5-4.5 x 1.5-3 cm, tapering very gradually into the petiole, petioles about 0.3-0.5 cm long. Leafy stems longitudinally ribbed and clothed in pale medifixed hairs.

Flowers

Inflorescence a panicle or cyme of heads. Heads surrounded by several rows of green, hairy bracts. All flowers, 20-30, in each head hermaphroditic. Flowers about 5 mm long. Calyx reduced to a pappus (about 30 bristles, each about 3 mm long) each bristle microscopically barbed. Corolla tube about 4 mm long. Anthers fused, filaments free. Pollen white. Ovary hairy. Stigma 2-armed.

Fruit

Achene hairy, about 1.5-2 mm long, pappus about 4 mm long, persistent at the apex. Bristles of pappus microscopically barbed. Embryo about 1 mm long.

Seedlings

Cotyledons broadly ovate to elliptic, about 4-6 x 4-5 mm. Stem above the cotyledons and both the upper and lower surfaces of the leaf blades clothed in bifid hairs. At the tenth leaf stage: leaf margins toothed and undulate. Plant densely clothed in long white hairs, upper surface of the leaf blade more sparsely clothed than the lower surface.

Distribution and Ecology

Occurs in NT, CYP, NEQ and southwards as far as south-eastern New South Wales. Altitudinal range in northern Australia from near sea level to 1000 m. Usually grows in open forest but sometimes found in monsoon forest and vine thickets. Also occurs in Asia, Malesia and the Pacific islands.

Natural History

This species may have some medicinal uses. (http://www.vedamsbooks.com/no11386.htm)

CYP

X

NEQ

X

Herb (herbaceous or woody, under 1 m tall)

X

Shrub (woody or herbaceous, 1-6 m tall)

X

RFK Code

3087