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DESCRIPTION:
Gregg arrowhead, a perennial aquatic broadleaf plant, has submersed seedlings. Cotyledons (seed leaves) have narrow,
light green leaves that taper to a point. Rectangular-shaped markings on leaves help to distinguish
these seedlings from ducksalad and bulrush. Characteristic
arrowhead leaf shape does not appear until the third or fourth true leaf. Mature leaves of Gregg arrowhead are
much narrower than California arrowhead, and have basal lobes
two to three times longer than the terminal lobe. These plants reproduce from seed and rhizomes.
Arrowheads are primarily a problem in rice where stands are thin and in excavated areas.
Broadleaf ID illustration.
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