Category Archives: Trees

Prunus Witches’ Broom

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  Continuing on the bitter cherry (Prunus emarginata) theme: The yeast-like sac fungus Taphrina confusa induces witches’ brooms on several Prunus species. Although the western choke cherry (P virginiana) and Sierra plum (P subcordata) are most often infected, Leonard and … Continue reading

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Bitter Cherry Fruits

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By August, red drupes have formed from the white bitter cherry (Prunus emarginata) flowers discussed in my previous post  (see “Bitter Cherry” on 03-17-19). Bitter cherry fruits are very bitter and astringent. I can attest to how unpalatable these pretty … Continue reading

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Bitter Cherry

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Bitter cherry (Prunus emarginata) is a native shrub or small tree found from British Columbia to Baja and east into the Rocky Mountain States. The two varieties of P emarginata are distinguished, in part, by their growth form: one more … Continue reading

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Redwood Needles and Cones

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Since my last post about coast redwoods (see “Redwood Longevity”  from 10-14-18) Leonard and I spent several days amid the coast redwoods (Sequoia sempervirens) on the Northern California Coast. On this trip I collected some mature redwood cones. While staring … Continue reading

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Redwood Longevity

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Coast redwoods (Sequoia sempervirens) normally live between 1,000 and 1,500 years. One redwood was determined to be 2,200 years old. (see “Coast Redwood” on 10-13-18) To achieve these phenomenal life spans, coast redwoods have many adaptations to help them survive. … Continue reading

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Coast Redwood

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Leonard and I visited the redwoods (Sequoia sempervirens) more often than usual this year. I never tire of hiking among these magnificent trees. Although there are as many as 40 fossil forms of redwoods distributed throughout North America, currently there … Continue reading

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Red Cone Gall

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There are over 800 species of cynipid wasps, most of which use oak trees as their egg-laying sites. The red cone gall is induced by the cynipid wasp Andricus kingi. Red cone galls occur on the leaves of blue, Oregon  … Continue reading

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