screw augur


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Noun1.screw augur - an orchid of the genus Spiranthes having tall erect densely flowered spiraling clusters of creamy white vanilla-scented flowersscrew augur - an orchid of the genus Spiranthes having tall erect densely flowered spiraling clusters of creamy white vanilla-scented flowers; widely distributed especially in low damp places of eastern and central North America
genus Spiranthes, Spiranthes - large cosmopolitan genus of white-flowered terrestrial orchids
ladies' tresses, lady's tresses - an orchid of the genus Spiranthes having slender often twisted spikes of white flowers