Rhizanthella gardneri R.S.Rogers

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Rhizanthella gardneri, commonly known as western underground orchid, is a species of flowering plant in the orchid family and is endemic to the southwest of Western Australia. It is a herb that spends its entire life cycle, including flowering, at or below the soil surface. A head of up to 100 small reddish to cream-coloured, inward facing flowers surrounded by large, cream-coloured bracts with a horizontal rhizome is produced between May and July.

Description

Rhizanthella gardneri is a leafless, sympodial herb with a horizontal rhizome 60–120 mm (2.4–4.7 in) below the soil surface. Beginning in late May to early June, the plant produces up to 100 small, inward-facing pinkish to deep red and cream coloured flowers 4–5 mm (0.16–0.20 in) wide, surrounded by six to twelve pinkish-cream bracts. The bracts curve over the flowers, forming a tulip-like head and leaving a small opening at, or a few millimetres above the soil surface. After pollination, each flower produces a fleshy, berry-like fruit containing up to 150 seeds. Unlike the capsules of other orchids that produce minute, dust-like seeds dispersed by the wind, this species produces indehiscent fruit.

Rhizanthella gardneri - Wikipedia

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