Roadside Laguna Cyn. Rd, 1600 and 3800 ft S El Toro Rd, 9-8-11. © Ron Vanderhoff.


Tropical Horseweed
(Asthmaweed)

Erigeron floribunda

Exotic species, native to South America

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C. floribunda (left) and C. canadensis (right). San Juan Ck Channel, Michelson to Campus, 9-24-11. © Ron Vanderhoff.
Roadside Laguna Cyn. Rd, 1600 and 3800 ft S El Toro Rd, 9-8-11. © Ron Vanderhoff.

Roadside Laguna Cyn. Rd, 1600 and 3800 ft S El Toro Rd, 9-8-11. © Ron Vanderhoff.
Roadside Laguna Cyn. Rd, 1600 and 3800 ft S El Toro Rd, 9-8-11. © Ron Vanderhoff.