Tamarix ramosissima (saltcedar, tamarisk) is a shrub or a tree (family Tamaricaceae) which can be found along streams and lake shores, throughout California. Tamarix ramosissima is associated with dramatic changes in geomorphology, groundwater availability, soil chemistry, fire frequency, plant community composition, and native wildlife diversity. It may hybridize with Tamarix gallica or Tamarix chinensis.

Chinese tallow tree (Triadica sebifera) is a deciduous tree (family Euphorbiaceae) native to eastern Asia that was introduced into California as an ornamental shade tree. It has since naturalized in several locations across California and is expanding into riparian areas, where stands threaten wildlife habitat and crowd out native vegetation. Leaves are waxy and bright […]

Acacia cyclops (cyclops Acacia) is a shrub (family Fabaceae) with golden yellow flowers and narrow leaves found in the coastal ranges and peninsular ranges of California. It is native to Southwestern Australia. It occurs in dunes. Its seeds are dispersed via birds and the germination process may be assisted by the seed’s passage through the […]

Acacia paradoxa (kangaroothorn) is a shrub (family Fabaceae) with yellow flowers and spiny branches found in the coastal ranges of California. It is native to Southeastern Australia. It favors woodland habitats. It is pollinated by beetles, wasps, bees and other insects. Its seeds are dispersed via water, birds and human activities.

Acacia pycnantha (golden wattle) is a shrub (family Fabaceae) with golden yellow flowers and narrow leaves found in the San Francisco Bay area and coastal ranges of California. It is native to Southeastern Australia. It favors woodland habitats. It spreads via long-lived seeds, and is dispersed by ants, birds, wind, water and dumped garden waste.

Acaena novae-zelandiae (biddy-biddy) is a herb/subshrub (stem succulent) (family Rosaceae) with white flowers found in the coastal ranges of California. A pale reddish colored burr is left after the flowers fall. It is native to Australia, New Zealand and New Guinea. It favors dunes, grasslands, and scrub and chaparral habitat. It can spreads via roots […]

Aegilops cylindrica (jointed goatgrass) is an annual grass (family Poaceae) with joints similar to wheat that can grow up to 4 feet tall and is found in the Cascade ranges, Modoc Plateau, Sacramento Valley and San Bernardino and peninsular ranges of southern California. It is native to Mediterranean Europe and western Asia. It favors grasslands. […]

Alopecurus pratensis (meadow foxtail) is a perennial grass (family Poaceae) that can grow to be more than 3 feet high and is found in the coastal ranges, desert ranges and northern and southern ranges of California. It is native to Eurasia. It grows in grasslands, wetlands and meadows. It spreads via seeds and rhizomes through […]

Alyssum murale (yellowtuft) is a perennial herb (family Brassicaceae) with tiny yellow flowers and narrow leaves found in the southern and northeastern ranges of Oregon. It is native to Southeastern Europe. It favors woodland habitats. It spreads via wind and human activities. Its seeds attach to nearby growing plants.

Alyssum corsicum (yellowtuft) is a perrenial herb/subshrub (stem succulent) (family Brassicaceae) with tiny yellow flowers and silver-blue leaves found in the southern and northeastern ranges of Oregon. It is native to Southeastern Europe. It favors woodland habitats. It spreads via wind and human activities. Its seeds attach to nearby growing plants.