Key To Fall Yellow-Flowering Shrubs In The San Gabriel Mountains

This is a key to the most common shrubs that bloom in the fall with yellow flowers found along the roads of the San Gabriel Mountains. It is available in two forms:

There are seven species of shrubs that produce copious yellow blooms along the roadsides of the San Gabriel Mountains in September and October of each year. Although to a beginner these species look fairly similar from a car traveling at 50 mph, it is very easy to distinguish these species up close. After becoming familiar with these species, it soon becomes easy to recognize the other species from the car as well. Only four of these species are common:

Not every shrub with yellow flowers blooming in the fall found in the San Gabriel Mountains is in this key; just the most common ones. Some Ericameria are missing; see Goldenbush Key for a few of the other less common species.

The key does not include Heterotheca species, since these are not in fact shrubs, but perennials with stems that seem woody, but die down to the ground each winter. H. grandiflora does not look very shrubby, and usually consists of just a single stem that looks like a telephone pole, hence its common name of telegraph weed. H. sessiliflora is a very low compact plant, much smaller than the shrubs in this key.

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Copyright © 2004 by Tom Chester, Michael Charters and Jane Strong
Permission is freely granted to reproduce any or all of this page as long as credit is given to us at this source:
Comments and feedback: Tom Chester | Michael Charters | Jane Strong
Last update: 13 September 2004