| Cupressus forbesii | |
|---|---|
| One of the very few Cupressus forbesii that survived the Feb. 2006 fire at Coal Canyon, Cleveland National Forest | |
| Conservation status | |
| Scientific classification | |
| Kingdom: | Plantae |
| Division: | Pinophyta |
| Class: | Pinopsida |
| Order: | Pinales |
| Family: | Cupressaceae |
| Genus: | Cupressus |
| Species: | C. forbesii |
| Binomial name | |
| Cupressus forbesii Jeps. |
|
Cupressus forbesii (Tecate cypress or Forbes' cypress)[1] is a species of cypress in western North America. [2]
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Cupressus forbesii is native to chaparral and woodlands habitats and grows at 450–1,500 metres (1,480–4,900 ft). [2] It found in the western Peninsular Ranges in: Orange and San Diego Counties in Southern California; and northern Baja California, Mexico. [2]
The northernmost stand, in Orange County, which comprises a large area on the upper limits of Coal Canyon and Sierra Peak in the Santa Ana Mountains, burned in a 2006 wildfire. Very few mature trees survived but regeneration is occurring by the hundreds to thousands. However another wildfire before trees are able to reach cone-producing age, which can be quite old for this species, could extirpate the stand.
Cupressus forbesii reaches 10 metres (33 ft), and is usually without dominant terminal shoot resulting in a multi-trunked tree. The foliage ranges from rich light green to green, and seed cones are dark brown, 20–32 mm. [2]
Cupressus forbesii has in the past been referred to as Cupressus guadalupensis var. forbesii. This taxonomy has been somewhat controversial, as morphology and molecular testing have both shown Cupressus guadalupensis to be genetically distinct enough from Cupressus forbesii to to warrant being placed in its own species. Cupressus guadalupensis is endemic to Guadalupe Island off Baja California, two hundred fifty miles away from any C. forbesii stands. Molecular testing has shown Cupressus guadalupensis to be slightly more closely related to Cupressus stephensonii.
Major differences between Tecate Cypress (Cupressus forbesii) and Guadalupe Cypress (Cupressus guadalupensis) are:
The Tecate Cypress is the only plant on which the rare Thorne's Hairstreak (Callophrys gryneus thornei) lays its eggs.[3]
Cupressus forbesii has proven to be a successful specimen tree, tolerant of the California Coastal climate and its cool temperatures and humidity, where other inland-growing Cypress species such as Cupressus macnabiana have done poorly in these conditions. A Tecate Cypress planted at Strybing Arboretum in San Francisco is showing vigor and produces viable cones at forty years of age.