sour trifoly
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sour trefoil — noun also sour trifoly : a wood sorrel (Oxalis acetosella) … Useful english dictionary
herbaceous plant — noun a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests • Syn: ↑herb • Derivationally related forms: ↑herbal (for: ↑herb) • Hypernyms: ↑ … Useful english dictionary