Tag Archives: cynipid wasp

Oak Apple Gall

This gallery contains 8 photos.

There are over 150 species cynipid wasps that induce galls on California oaks. Barely the size of fruit flies, these wasps cause some of the most exotic plant galls displaying a variety of shapes (conical, spherical, stalked, disc-shaped, spiny, etc.) … Continue reading

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Red Cone Gall

This gallery contains 6 photos.

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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Hairy Gall Wasp

This gallery contains 5 photos.

Canyon live oaks (Quercus chrysolepis) are plentiful on Spring Hill (a “satellite” volcanic cone) at the base of Mount Shasta (Shasta County CA). When young, the evergreen, leathery leaves have spiny margins while older leaves are usually entire. Both leaf … Continue reading

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Crystalline Tube Gall

This gallery contains 7 photos.

A gall formed on Oregon white oaks (Quercus garryana –¬†see “Oaks in Spring” 03-05-14) by the cynipid wasp Trichoteras tubifaciens is the crystalline tube gall. A tubular-shaped gall covered in short, crystalline hairs, the crystalline tube gall ranges in color … Continue reading

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Urchin Gall Wasp

This gallery contains 6 photos.

The urchin gall wasp (Antron quercusechinus) is a cynipid wasp that induces galls on oaks and exhibits an alternation of generation. In the spring a sexual generation emerges from a bud gall. The males and females of this generation induce … Continue reading

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Sunburst Gall Wasp

This gallery contains 6 photos.

Another cynipid wasp that induces a fascinating gall on blue oaks and Oregon white oaks (Quercus garryana) is the sunburst gall wasp (Andricus stellaris). As with the ball-tipped gall wasp, another cynipid wasp featured in my last post (see “Ball-tipped … Continue reading

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Ball-tipped Gall Wasp

This gallery contains 4 photos.

Most wildflowers have long faded and due to the continuing drought in our area (Northern California) fungi are scarce while the birds are unpredictable and scattered. Thus while wandering about I find myself focusing on usually overlooked subjects. Oaks support … Continue reading

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