Narrow Leaf Milkweed,
Mexican Whorled Milkweed
Asclepias fascicularis
Color: Greenish white, sometimes tinged purple
Common name: Narrow Leaf Milkweed, Mexican Whorled Milkweed
Latin name: Asclepias fascicularis
Family: APOCYNACEAE, formerly included in Asclepiadaceae
Height: 20-30 inches
Description: Normally without hairs. The plant sends up many thin, erect stems with blooms in clusters of lavender or lavender-tinted white flowers which have five reflexed lobes that extend down away from the blossom. The fruits are smooth milkweed pods which split open to spill seeds along with plentiful silky hairs.
Leaf: Long pointed leaves which are very narrow and often whorled about the stem, giving the plant its common names.
Range: California (except North Coast, Central Coast, South Coast)
Habitat: Dry ground, valleys, foothills; springs and alkali seeps in the Mojave Desert.
Elevation: 50–2200 m.
Flowering time: Jun–Sep
Notes: It is a specific Monarch butterfly food and habitat plant in nectar and vegetation and cocoon habitat plant. The alkaloids they ingest from the plant are retained in the butterfly, making it unpalatable to predators. Asclepias fascicularis, a dicot, is a perennial herb that is native to California and is also found outside of California, but is confined to western North America. Distribution outside California: to Washington, Utah, Baja California. It can cause minor dermatitis. Photographed July 22, 2006 with an Canon EOS 20D with a 300mm lens and 1.4 teleconverter.
Horticulture information: Given excellent drainage (modification of compacted or other water-holding soils may be necessary), absence of frequent summer water (distance from water-loving plants), and full or nearly full sun (tolerates summer afternoon sun), grows especially well in zones 3, 7, 8, 9, 14, 15, and 18 and also in zones 10, 16, 17, 19, 20, 21, 22, 23, and 24.
We have an online wildflower field guide that is designed to help you identify desert wildflowers by color, scientific name, region and common name. The pictures are sized to work on the iPod, iPhone, iPad and similar devices. With your iPod or phone you will easily be able to identify wildflowers while in the desert. Links for downloads are on the bottom of the Wildflower Field Guide page.
Photo tips: Most digital point-and-shoot cameras have a macro function - usually symbolized by the icon of a little flower. When you turn on that function, you allow your camera to get closer to the subject, looking into a flower for example. Or getting up close and personal with a bug. More on desert photography.
Mojave Desert Wildflowers - This book is the standard by which all other wildflower books are measured. The author, Jon Mark Stewart, has combined super photography with concise information. This book has an entire color page for each wildflower covered, with a discussion of the wildflower. 210 pages with 200 color photos. More...
What's Blooming Now - Check the Wildflower Reports
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The Desert Environment
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