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(Last Modified On 10/22/2012)
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(Last Modified On 10/22/2012)
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Genus
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ISCHAEMUM L.
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PlaceOfPublication
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Sp. P1. 1049. 1753.
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Description
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Spikelets in pairs, all alike, perfect, but the pedicellate spikelet not always fruitful, the rachis and pedicels of the disarticulating racemes thickened; first glume indurate and rounded below, flattened, herbaceous and sometimes winged above, often cross-wrinkled or ridged, the narrow margins sharply inflexed; sterile lemma hyaline, as long as the glumes, enclosing a well-developed palea and stami- nate flower; fertile lemma hyaline, deeply bifid, awned from between the teeth, the awn geniculate, tightly twisted below the bend.
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Note
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Branching annuals or perennials, often decumbent-spreading, with flat blades and rather thick racemes, digitate or flabellate at the ends of the branches.
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Key
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a. Plants annual; first glume strongly transversely ridged -1. I. RUGOSUM aa. Plants perennial; first glume sometimes wrinkled, but not transversely ridged - _ - _ - _ .-- - 2. I. CILIARE
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