Tag: plants

willow galls

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galls

Galls, also known as cecidia, are abnormal swellings that form on the outer tissues of plants, resembling benign tumors or warts in animals. These growths can be triggered by a wide range of parasites, including viruses, fungi, bacteria, other plants, insects, and mites. The scientific study of these structures is called cecidology.

Galls come in many different sizes, shapes and colours; I’m always looking out for them. Our native arroyo willows display at least two different insect-triggered galls. The sawfly/midge lays its eggs under the surface of the leaf/stem. Cecidologists are still trying to figure out how the plant’s genetic instructions cause the responding structures, which provide shelter and food for the insect’s larvae when they hatch.

junior rangers

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JR_plants

It was a busy day at the Park today! We started off with a Junior Ranger program on plants, with a whole lot of enthusiastic kids. Then I worked in the Visitor Center for the afternoon; nearly 200 people came through in four hours, over three-quarters of them in the first two hours. I heard so many great questions, it made my inquiring heart happy.

Cercocarpus betuloides

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Cercocarpus betuloides

Mountain mahogany is one of my favourite chaparral shrubs. Right now, clusters of yellow flowers are attracting hummingbirds, butterflies—and nature journalers! It’s especially notable for its long, feathery seeds that curl like delicate spirals and glisten in the sunlight. The name Cercocarpus translates to “fruit with a tail,” a nod to these distinctive seed plumes. Despite its name—given for the dark, mahogany-colored bark—this native plant is actually in the Rose family.

Cotoneaster pannosus

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Cotoneaster pannosus

Growing up in Canberra, Australia, we had a row of cotoneasters along the back fence, so I immediately recognised the one in the garden here. Silverleaf Cotoneaster, originally introduced from China as an ornamental plant, features white flowers and red fruits. It has escaped cultivation and is now found in disturbed areas, particularly near residential zones, as well as in undisturbed coastal scrub, grasslands, and forests. Each plant can produce thousands of fruits annually, which are spread by birds, small mammals, water, and human activity. Its Cal-IPC (Invasive Plants Council) rating is Moderate.

The berries are toxic to domestic pets, including dogs and cats, and are not considered safe for human consumption. I’ve read that blackbirds, thrushes and waxwings enjoy the fruit, but I have not observed that for myself — must keep an eye out for birds in the bush!

Dieffenbachia

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dieffenbachia

Along with dinosaurs and fossils and underwater photographs, this house has a lot of large Dieffenbachia plants.

Dieffenbachia is a perennial herbaceous plant with an upright stem and simple, alternate leaves marked by white spots and flecks, which make it a popular choice for indoor foliage. These plants are favored as houseplants due to their ability to thrive in low light conditions.

The common name “dumb cane” comes from the toxic effect of raphides found in the plant, which can impair speech. Ingesting the plant can lead to immediate numbness, followed by painful swelling of the feet, the formation of blisters, and swelling of the throat. These symptoms are accompanied by a painful stinging and burning sensation in the mouth and throat, which may persist for up to two weeks. So don’t be eating those leaves!