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Amaranthus palmeri [Amaranthaceae]

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Scientific Name Amaranthus palmeri USDA PLANTS Symbol AMPA
Common Name Palmer's Amaranth, Carelessweed ITIS Taxonomic Serial No. 20740
Family Amaranthaceae (Amaranth) SEINet
Reference
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Description Habitat: Various soils along streambanks, disturbed areas, farmlands, roadsides, railroads and waste areas; widespread, 330 to 3300 ft.
Plant: Erect annual 2 to 5 feet tall, stems are green with purplish stripes, lower branches usually ascending; dioeceous (separate male and female plants).
Leaves: Alternate leaves on long petioles (1.2 to 2.4 inches); lower leaves obovate or rhombic-obovate to elliptic with wedge-shaped base; uppeer leaves sometimes lanceolate; 0.6 to 2.75 inches long; margins are entire with a small point (mucronate) at the the tip.
Inflorescence: Spikes of many small flower clusters; spikes are leafless, or nearly so, long, slender and drooping; also occasional small clusters of flowers in leaf axils; clusters comprising green and white, occasionally pink-tinged flowers, each cluster subtended by a bract; staminate flowers with 5 unequal spine-tipped tepals and 5 stamens; pistillate flowers with 5 unequal tepals and 2 or 3 spreading stigmas; bracts below staminate flowers equaling or longer than outer tepals and with long-pointed tip; bracts below pistillate flowers with midrib extending beyond the tip
Bloom Period: August to November.
References: SEINet, The Jepson Herbarium and Wildflower Search.
BONAP Distribution Map

Texas Status:
Native

© Tom Lebsack 2022