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(Last Modified On 10/31/2012)
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(Last Modified On 10/31/2012)
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Genus
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XYRIS L.
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PlaceOfPublication
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Sp. PL. 42. 1753
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Reference
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Malme, N. Am. Fl. 19:3. 1937.
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Synonym
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Kotsjiletti Adans. Fam. PI. 2:60, 544. 1763.
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Description
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Perennial, occasionally annual, tufted herbs of damp or wet situations. Leaves mostly basal, linear, terete, or lanceolate, sheathing at the base. Flowering scapes erect, simple, terminated by a solitary dense spike or head, and usually bearing 1 to several bladeless sheaths at the base. Flowering spikes or heads globose to elongate; bracts glumaceous, rather rigid or thin and papery, spirally imbricated, the lower usually sterile, the upper subtending the rather inconspicuous flowers. Flowers perfect, solitary and sessile in the axils of the bracts, yellow or blue, rarely white. Sepals 2-3, unequal. Petals 3, usually equal, obovate-spatulate, the basal claws free or united. Stamens 3, opposite the petals and adnate to claws; filaments usually short and flattened; anthers basifixed, 2-celled, dehiscent longi- tudinally. Staminodes (when present) 3, alternating with the petals, usually bifid at the tip, the branches usually tipped with brush-like tufts of moniliform hairs. Ovary 1-celled or imperfectly 3-celled; ovules numerous; style filiform, usually 3-cleft at the tip. Capsule loculicidal.
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