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(Last Modified On 1/11/2013)
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(Last Modified On 1/11/2013)
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Genus
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APIUM L.
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PlaceOfPublication
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Sp. P1. 264. 1753.
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Synonym
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Ciclospermum Lag. Amen. Nat. 101. 1821
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Description
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Annual, biennial, or perennial glabrous herbs from taproots or creeping root- stocks; stems erect to prostrate, usually branched, the leaves petiolate, pinnate to ternate-pinnately decompound, the petiole sheathing; inflorescence of compound (or frequently some simple) umbels with or without an involucre and involucel; flowers white or greenish, the petals with an inflexed apex, the calyx minute or obsolete; stylopodium short-conical to depressed, the styles short, the carpophore entire, bifid, or 2-cleft; fruit compressed laterally and constricted at the com- missure, the ribs filiform, prominent, obtuse, the vittae solitary in the intervals, 2 on the commissure; seed subterete, its face flat.
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Habit
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herb
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Note
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This is a very large genus with an essentially cosmopolitan distribution. How- ever, the genus is characterized largely in negative terms, and the intergeneric boundaries and the homogeneity of the group as last monographed by Wolff in 1927 (Das Pflanzenreich 90 [IV. 228]:26-58) leave many problem unresolved.
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