Weed
river bulrush
AcheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat.
ObovateObovate:
Inverted egg shaped with apical end the broadest.
; cross section is triangular.
Gray to black
Smooth
Three to six bristles appressedAppressed:
Pressed close or lying flat against something.
to the acheneAchene:
A dry, hard, one-chambered, one-seeded indehiscent fruit, as in buckwheat (Fagopyrum) or sunflower (Helianthus). The fruit wall is not united with the seed coat. and attached to the base.
The triangular cross section is often compressed so that one side is larger than the other two.
Not listed
Not included
Cyperaceae
Bolboschoenus fluviatilis (Torr.) Soják
Bolboschoenus maritimus (L.) Palla ssp. fluviatilis (Torr.) Á. Löve & D. Löve
Scirpus fluviatilis (Torr.) A. Gray
Schoenoplectus fluviatilis (Torr.) M.T. Strong
Scirpus maritimus L. var. fluviatilis Torr.
