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AGAVE AND YUCCA | CACTI | WILDFLOWERS

Asclepias Linaria, Pineneedle Milkweed


Plants > Wildflowers > Apocynaceae > Asclepias Linaria
Pineneedle Milkweed; Asclepias linaria (pineneedle milkweed), Joe's Canyon Trail, Coronado National Memorial, Arizona
Asclepias linaria (pineneedle milkweed), Joe's Canyon Trail, Coronado National Memorial, Arizona
Common name:
Pineneedle milkweed
Family:
Dogbane (Apocynaceae)
Scientific name:
Asclepias linaria
Main flower color:
White
Range:
South Arizona and far southwest New Mexico
Height:
Up to 5 feet
Habitat:
Canyons, rocky hillsides, from 2,500 to 6,000 feet
Leaves:
Thin, linear, pointed at the tip; up to 2 inches long
Season:
February to December
Pintrest
Leaves of asclepias linaria resemble those of a pine tree; narrow, needle-like, crowed all along the stem, and pointing in all directions. Leaf margins are rolled under, and are lined with a few short hairs, most noticeable on young growth. Leaf tips taper to a sharp point.

The plant can bloom any time of year, reflecting its habitat of sunny, desert areas in central and south Arizona, but the peak months are from April to August. Flowers are produced in several clusters, at or near the top of the stems, each typically containing 10 to 20 heads. The flowers, which are attached by stalks of around one inch in length, are formed of a five-lobed calyx below a five-lobed corolla, white with purple streaks, while at the center are five similarly colored hoods, each enclosing a short white horn, generally not exserted. When fully mature both the calyx and corolla lobes are reflexed. Fruits are bulbous green follicles.




Leaves and flowers
Leaves and flowers
Pineneedle Milkweed
Green fruit
Buds and flowers
Buds and flowers
Yellowish flowers
Yellowish flowers
Compact cluster
Compact cluster
Flowers and leaves
Flowers and leaves
Inflated fruit
Inflated fruit
Developing flowers
Developing flowers
Flower cluster
Flower cluster
White flowers
White flowers
Purplish buds
Purplish buds
Pine-like leaves
Pine-like leaves
Inflorescence
Inflorescence
Clustered flowers
Clustered flowers
Greenish-white flowers
Greenish-white flowers
Inflorescence
Inflorescence
Clustered flowers
Clustered flowers
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