urbpan: (dandelion)
"Warm" meaning "above 32F."

 photo IMG_4356_zpsa5d2b3e9.jpg
A non-native invasive species, but a source of color at the black chain-link gate. The fruit of the tomato relative bittersweet nightshade Solanum dulcamara.

 photo IMG_4357_zpseac2a7b9.jpg
Just a few feet away, the fruit of the fungus Exidia recisa, having weakened the wood of an overhead branch, has fallen with its food to the ground. There is no accepted common name for this mushroom, but I like "winter jelly" or maybe "willow jelly" since it's one of the only mushrooms common in winter, and it mostly feeds on willow branches.
urbpan: (cold)
Urban species #074: Pussy willow Salix discolor


Macro photos by [livejournal.com profile] cottonmanifesto

If an award were to be given for "most charismatic shrub," I'd have to cast my vote for the pussy willow. Few others have buds (which have the adorable name "catkins") which have soft grey fur to pet. The fact that they develop these flower buds just as us northerners are desperate for a sign of spring makes it all the better. The fur, as it turns out, provides the same function for the developing flower as it does for mammals: it keeps it warm. Pussy willows bloom early in the spring (or late in the winter, depending on your view) to take advantage of the few pollinators available this time of year. Those pollinators that are active (and here I'm talking about a few kinds of bees and other insects) have few other flowers that they can visit and draw nectar from.

Pussy willows are shrubs (or sometimes small trees) that like swamps and water margins, and may be planted in city parks in such locations. Salix discolor is native to North America, and S. caprea is its European relative. Cuttings of either species can be readily transplanted by simply sticking a cut branch into the ground. Willows of all kinds are favored by herbivores, including urban species like muskrats.

closer up, and two full images )
urbpan: (cold)


Urban species #028: Weeping willow Salix babylonica*

Native to China, this large, spreading tree is appreciated for it's unusual, drooping branches. This form can be artificially cultivated in other urban trees, such as cherry, but naturally occurs in the weeping willow. Often planted in city parks near water, it is an uncommonly thirsty tree. Ducks may nest in its vast spreading root structure, squirrels den in cavities in the wide trunk, the canopy of dangling branches gently sweeping the ground invite a picnic. Though exotic, weeping willow is not considered invasive in the United States, except Hawaii.

two large photographs )

*The trees in these photographs are probably golden weeping willow, Salix x sepulcralis 'Chrysocoma', a hybrid that is cold-tolerant and can grow much taller than S. babylonica.

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