Bract Milkweed

 

Asclepias brachystephana

Common Name(s):

bract milkweed

desert-rose milkweed

short-crowned milkweed

 

Scientific Name:

Asclepias brachystephana

 

Native Range:

AZ, NM, TX

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USDA Symbol:

ASBR

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Habitat: 

• mesquite scrub

• desert mountains

• dry plains

• grasslands

• mesas

• disturbed areas of dry alluvial soil

• elevation 3,500-7,000 feet (1,070-2,130 meters)

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Growing Conditions:

• Full sun

 

Plant Height:
• 12-24 inches (30-58 centimeters) tall

 

Stem Description:

• ascend at an angle or are erect

• clustered

• whitish color due to dense hairs

• hairs may be absent from older stems which will appear greenish

 

Leaf Description:

• 3-6 inches (cm) long 

• linear-lanceolate

• apex is acuminate

• abruptly narrowed at the base into a short petiole

• petiole 0.8-0.3 inches (2-8 millimeters) long

 

Leaf Arrangement:

• opposite and dense

 

Leaf Margin:

• 2-5 inches (5-12 centimeters) long

• 0.20-0.8 inches wide (5-20 millimeters) wide

 

Leaf Surface:

• white and woolly above, smooth below

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Flowering Period: 

• April through September

Flower Description: 

• reddish purple to violet

• petals are oblong-ovate

• corollas reflexed backwards 

• 3-8 umbels

• hoods broader than long, toothed on the inner margins 

• hoods and horns are yellowish

• horns attached near the middle of the hoods

• petals are approximately 0.2 inches (5 millimeters) long

• flower stalks are 0.4-0.8 inches (10-20 millimeters) long

• 6-12 flower stalks per cluster

• flowers often near the top nodes of the stem

 

Pod Description:

• 2-4 inches (cm) long

• erect on deflexed pedicels

• oblong

• smooth

• reddish

• white or green striped

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Other Information:

• Special value to native bees