Barbara's Lake, Lag Cyn., 9-11-11. © Ron Vanderhoff.


Tall horseweed

Conyza canadensis

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San Juan Ck Channel, Michelson to Campus, 9-24-11. © Ron Vanderhoff.

C. floribunda (left) and C. canadensis (right). San Juan Ck Channel, Michelson to Campus, 9-24-11. © Ron Vanderhoff.

With spittlebug. San Juan Ck Channel, Michelson to Campus, 9-24-11. © Ron Vanderhoff.

Barbara's Lake, Lag Cyn., 9-11-11. © Ron Vanderhoff.

Laguna Lakes, Lag. Coast Wldns., 7-11-13. © Ron Vanderhoff.