Common Name:
arrowleaf
tear-thumb
Scientific Name:
Polygonum sagittatum
Scientific Name Synonym:
Persicaria sagittata
Family Name:
Polygonaceae
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Smartweed or Buckwheat Family
Life Cycle
native annual, reproducing by seed
Stems
upright becoming reclining or sprawling, 4-sided and ribbed, slender and weak, retrorsely barbed, nodes swollen with ohrea present
Leaves
alternate, lanceolate to oblong with arrow-shaped basal lobes, lobes surrounds stem, tips pointed, margins entire, smooth without hairs, barbs on mid-vein below, petioles slender and barbed, long petioles below and nearly sessile above
Flowers
5-sepaled, pink to white, egg-shaped and often closed; terminal and axillary racemes with 2 to 10 flowers
