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(Last Modified On 1/25/2013)
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(Last Modified On 1/25/2013)
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Species
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CHENOPODIUM MURALE L.
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PlaceOfPublication
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Sp. P1. 219. 1753.
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Synonym
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Atriplex muralis Crantz, Inst. 1:206. 1766. Chenopodium guineense Jacq. Coll. 2:346. 1788. Chenopodium carthagenense Zuccagni, in Roem. Coll. 133. 1806. Chenopodium murale ,B albescens Moq. Chenopod. Enum. 32. 1840. Chenopodium murale 'y carthagenense Moq. loc. cit. 32. 1840. Vulvaria trachiosperma Bubani, Fl. Pyren. 1: 177. 1897. Chenopodiurnz murale spissidentatum Murr, in Magyar Bot. Lap. 2:11. 1903.
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Description
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Erect or ascending annuals to as much as 6 dm. tall, the branches ascending, often deeply sulcate, occasionally farinose, especially toward the extremities. Leaves somewhat lustrous and occasionally bullate above, glabrous to rather densely farinose below, deltoid to rhomb-ovate, marginally irregularly and acutely dentate, apically acuminate to attenuate and often mucronate, basally acute to truncate, 2.5-8 cm. long, 2-5 cm. broad, the petioles mostly 3-70 mm. long, sometimes quite as long as the blades. Flowers irregularly disposed in glomerules, the glomerules sessile along the dichotomously branching rhachises, these axillary and terminal, distally farinose. Sepals 5, subequal, ovate, obtuse, cucullate, 1-ribbed, slightly if at all carinate, farinose, basally connate, 1-1.5 mm. long; stamens 5, caducous, the filaments flattened, the anthers orbicular, exserted; ovary subglobose, the style quite short, the 2 (-3) stigmata ca. twice as long, spreading, irregularly glandular. Utricle partially enclosed by the sepals, the seed lenticular-cochleate, minutely tuberculate, dull reddish-brown, 1.2-1.5 mm. broad, horizontal, the pericarp adherent.
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Distribution
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Presumably a native of Europe, Asia and Africa, now widely adventive in America as far north as Canada; in Panama known only as a lawn weed in San Jose Island.
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Specimen
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PANAMA: main camp, San Jose Island, Perlas Archipelago, Gulf of Panama, ca. 55 mi. sse. of Balboa, Johnston 1206.
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