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(Last Modified On 1/14/2013)
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(Last Modified On 1/14/2013)
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Genus
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RUMEX L.
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PlaceOfPublication
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Sp. P1. 333. 1753.
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Description
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Flowers perfect or unisexual, pedicellate, few to many in verticillate ochreolate fascicles. Perianth of 6 tepals, the outer 3 usually smaller and spreading or reflexed, the inner 3 cordate, entire or lacerate, frequently with an abaxial tubercle, usually accrescent and closely investing the achene. Stamens 6, discrete, the filaments usually shorter than the anthers, the anthers mostly 2-locular and loculicidal. Ovary trigonous with 3 spreading to reflexed filiform styles capped by fimbrillate peltate stigmata. Achene triquetrous, smooth and lustrous or rough and dull, usually included. Glabrous usually perennial herbs, occasionally becoming quite tall and shrubby. Leaves alternate, entire or rarely dentate, occasionally tending to form rosettes, the ochreae hyaline and rather tardily deciduous.
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Distribution
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Of this large predominantly temperate genus, only two species, both probably naturalized from Europe, are thus far represented in the flora of Panama.
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Note
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Here they tend to be weeds in lawns and pastures at higher elevations. R. costaricensis Rechinger, a strikingly large species, is apparently endemic to the high mountains of Costa Rica. Three other species are reported in Gu
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Note
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atemala by Standley & Steyermark (in Field Mus. Bot. 244 131. 1946).
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Key
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a. Flowers perfect, the inner tepals tuberculate, 3.5-5 mm. long; achenes smooth, about 3 mm. long; leaves cordate to acute basally; plants non- clonal, with yellowish taproots..................................................................... 1. R. CRISPUS aa. Flowers dioecious, the inner tepals not tuberculate, about 1 mm. long; achenes rough, about 1 mm. long; leaves hastate; plants clonal, with creeping rootstocks............................................................................................ 2. R. ACETOSELLA
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