The San Diego Ragweed represents a species of plant that finds itself in a sticky situation. But then, so does anyone who happens to brush up against it.
This remains an extremely rare variety of ragweed. This plant appears endemic only to Baja California, Mexico, and two counties in California, United States. That forms an extremely narrow range of habitat.
Experts classified it as a member of what has been dubbed the coastal sage scrub community of plants. The San Diego Ragweed possesses highly specific habitat requirements. This, in combination with both habitat loss and possessing a highly restricted, to begin with, has made preserving the San Diego Ragweed difficult.
Once again human expansion forms a major factor. This species currently awaits evaluation for inclusion in the IUCN Red List of Threatened Species.
San Diego Ragweed Habitat and Physical Characteristics
The San Diego Ragweed is a large (not to mention intimidating looking) type of shrub. It is sometimes known as the San Diego bursage, due to its prolific production of numerous burs.
The species is technically an evergreen (hard to believe, isn’t it?) and is also monoecious, as are most ragweed varieties. The San Diego Ragweed may attain heights of as much as 10 ft (3 m) and averages a width of approximately 6.6 ft (2 m). Well, we did say it was a large variety.
Interestingly, both the leaves and the flowers of this species are a pale yellowish green in color. The infinite variety of Nature at work.
The San Diego Ragweed is only found at altitudes ranging from 164-492 ft (50-150 m) above sea level. The species is a perennial and grows quite rapidly. In keeping with this tendency towards rapid growth, blooming typically occurs in early Spring.