Family: Orchidaceae
Diuris sulphurea
Citation:
R. Br., Prod. Fl. Nov. Holl. 316 (1810).
Synonymy: Not Applicable Common name: Tiger-orchid.
Description:
Small slender to rather stout plant 15-50 cm high; tubers obconical; leaves 2 or 3, linear-lanceolate, much exceeding the middle of the stem, 18-45 cm long, lax, channelled, never setaceous.
Flowers 1-6 (rarely more) in a loose raceme; yellow with a few brown markings; dorsal sepal c. 20 mm long, ovate, recurved, with a dark-brown spot on each side of the lower surface near the base; lateral sepals c. 22 mm long, usually parallel, spreading, linear, acuminate, green or green and brown; petals 20-21 mm long, on a brown stalk 4-5 mm long, spreading, lamina elliptical, yellow; labellum sessile, 3-lobed, shorter than the dorsal sepal, 12-15 mm long, trapezoid; lateral lobes about half as long as the central lobe, c. 5 mm long, rather wide and blunt, obovate, middle lobe wide, rhomboid-cuneate, depressed on either side of the central ridge; lamina with a transverse blotch near the apex and with a single conspicuous raised longitudinal ridge from the base to just beyond the middle, where it merges into the fold of the lobe; anther hardly pointed, its apex as high as the viscid disk of the rostellum: lateral appendages of the column prominent, semiovate, a little higher than the viscid disk, incurred.
Published illustration:
Gray (1966) Victorian native orchids, p. 41; Woolcock (1984) Australian terrestrial orchids, pl. 32B.
Distribution:
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Uncommon in damp sandy soils in open Eucalyptus baxteri forest and around swamp margins.
S.Aust.: SE. Qld; N.S.W.; Vic.; Tas.
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Conservation status:
native
Flowering time: Aug. — Nov.
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SA Distribution Map based
on current data relating to
specimens held in the
State Herbarium of South Australia
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Biology:
No text
Author:
Not yet available
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