Hesperocyparis macrocarpa
A coniferous tree endemic to California's Central Coast.
The Monterey cypress, scientifically named *Hesperocyparis macrocarpa* (formerly *Cupressus macrocarpa*), is a conifer in the cypress family that grows only in California. It is a glacial relict, meaning its natural range today is limited to two small, isolated stands near Carmel: Cypress Point in Pebble Beach and Point Lobos. During the last ice age, this tree likely formed a much larger forest that stretched farther north and south.
This medium-sized evergreen often grows irregularly and develops a flat top due to the strong winds in its native habitat. Under ideal conditions, it can reach 40 meters (133 feet) tall, with a trunk up to 2.5 meters (over 8 feet) in diameter. Its dense sprays of bright green, scale-like leaves (2–5 mm long) grow on rounded shoots and release a strong lemony scent when crushed. Seedlings under a year old have needle-like leaves 4–8 mm long. The seed cones are round or oblong, 20–35 mm long, with 6 to 14 scales; they start green and turn brown about 20–24 months after pollination. The pollen cones are 3–5 mm long and release pollen in late winter or early spring. The name *macrocarpa* comes from Greek and means "with large fruit."
Despite claims that some trees may be up to 2,000 years old due to their large trunks, the oldest confirmed age from physical evidence is only 284 years. Botanist Willis Linn Jepson noted that claims of 1,000 to 2,000 years in seaside literature lack real data and likely cater to a desire for superlatives. Few trees in the wild live past 100 years. However, many early introductions to New Zealand around 1860 still survive, with felling being their main cause of death. One example is the 160-year-old St. Barnabas Church tree in Stoke, Nelson, New Zealand.
German botanist Karl Theodor Hartweg first described the species in manuscript, but the formal description was published by George Gordon in 1849, who attributed the name *Cupressus macrocarpa* to Hartweg. Hartweg noted he could not venture far from Monterey for fear of being suspected of political motives by locals. His paper reached London in May 1847. Based on genetic evidence, New World *Cupressus* species, including this one, have been moved to the genus *Hesperocyparis*, as they are not closely related to Old World *Cupressus*.
Quick Facts
- Genus
- Hesperocyparis
- Species
- macrocarpa
Facts from the source article.
Lore & Background
The Monterey cypress was first described in manuscript by German botanist Karl Theodor Hartweg, but the formal scientific description was published by George Gordon in 1849, who named it Cupressus macrocarpa based on Hartweg's manuscript. Hartweg's observations occurred during the Mexican–American War, and he confined his excursions near Monterey due to safety concerns. The species has since been transferred to the genus Hesperocyparis based on genetic evidence separating New World from Old World Cupressus species. Fossilized remains at Drakes Bay and Rancho La Brea show a much larger past extent.
Despite assumptions that some trees may be up to 2,000 years old, the longest-lived report based on physical evidence is only 284 years. Botanist Willis Linn Jepson noted that claims of great age rest on no actual data. Few trees survive beyond 100 years.
Reader's Guide
Hesperocyparis macrocarpa holds significance as a glacial relict endemic to a tiny area of California's Central Coast, making it a living remnant of a once-larger forest. Its natural habitat, characterized by cool, moist summers and sea fog, is protected at Point Lobos State Natural Reserve and Del Monte Forest. The species has been widely planted in similar oceanic climates worldwide, including the coasts of California and Oregon, Europe, New Zealand, South Africa, and the Falkland Islands. In New Zealand, it naturalizes and grows larger than in its native range, with one specimen having a trunk diameter over 4.6 meters. It is used as a windbreak, ornamental, and timber tree, though it is susceptible to cypress canker in hot summers. The foliage is slightly toxic to livestock, and the wood is used by craftspeople and boat builders. The species is also one parent of the hybrid Leyland cypress. Its limited natural distribution and long cultivation history highlight both its vulnerability and its adaptability.
Did You Know?
- The natural distribution of Monterey cypress is confined to only two small populations near Carmel, California.
- The longest-lived individual based on physical evidence is only 284 years old, despite claims of trees up to 2,000 years.
- The species was first described by Karl Theodor Hartweg in 1846 during the Mexican–American War.
- In New Zealand, a specimen with a trunk diameter over 4.6 meters is considered the largest recorded single-stemmed specimen in the world.
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