Category Archives: Trees


In August Leonard and I climbed Mount Lassen. The higher we climbed the more stunted and deformed the whitebark pines (Pinus albicaulis) along the trail became. I was enchanted by the shape of these conifers and the tenacity with which … Continue reading

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Aspen Clones

This gallery contains 2 photos.

Quaking aspen (Populus tremuloides) reproduces both by seeds and root sprouts. This Willow Family (Salicaceae) member is dioecious, having male and female flowers on different plants. These unisexual, densely clustered, hairy, pendant catkins produce capsules, fruits that split open at … Continue reading

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Quaking Aspen

This gallery contains 7 photos.

Quaking aspen (Populus tremuloides) is the most widely distributed tree in North America. It ranges from Atlantic to Pacific, from Alaska and Canada to northern Mexico. In western North America quaking aspen becomes more and more confined to high-mountain habitats … Continue reading

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Limber Pine

This gallery contains 9 photos.

Limber pines (Pinus flexilis) are timberline trees growing in desert ranges and mountain slopes at elevations as low as 4,000 feet in northern habitats, however, in more southerly climes they only occur much higher. This short, compact pine can be … Continue reading

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Dwarf Juniper

This gallery contains 6 photos.

Juniperus communis can be an erect tree, a waist-high shrub or a prostrate shrub in form. Depending on the growth pattern, some taxonomists separate this species into subspecies. Others simply classify all the forms as J communis, as I will … Continue reading

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