Amaranthus spinosus L.
Spiny Amaranth, Thorny Pigweed
Amaranthaceae (Amaranth Family)USDA Symbol: AMSP
USDA Native Status: L48 (N), HI (I), PR (N), VI (N), CAN (I)
Specimen & Label Data
Location: Fenceline W of walking path adjacent to the horse pens--Oakwell Farms, San Antonio.
Habitat: Level, open, dry, alluvial soil. Common, in large colonies.
Description: Erect, stout, 90 cm tall annual from stout 15 cm, white taproot. Few branched low, and many small in upper half. Most nodes w/pair of divergent spines. Leaves alternate,ovate-lanceolate, glabrous, w/mucronate tip, 1.5x7 cm, cuneate to a long petiole. Monoecious. Terminal spikes mostly staminate. Basal clusters of spikes and axillary clusters pistillate.
Collector: Harry Cliffe
Collection Date: Sep 13, 1992
Specimen number: 489
Herbarium Owner: NPSOT
Herbarium ID: 0731
Accession Date: Apr 26, 1994
Accession Number: 53 Annotations: MCFRB Monoecious (In flower & fruit)