Wildflowers of Tucson, Arizona
Other Wildflower
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Mammillaria heyderi var. macdougalii - Macdougal's Nipple Cactus Mammillaria heyderi var. macdougalii - Macdougal's Nipple Cactus
Scientific Name: Mammillaria heyderi var. macdougalii (M. gummifera, M. macdougalii)
Common Name: Macdougal's Nipple Cactus
Flower Color: Greenish white to yellow-green
Plant Type: Cactus, Shrub, Perennial
Height: To 6 inches (15 cm) tall, but usually less
Date Observed: April 24, 2005
Notes: The up to 1.25 inch (3.2 cm) wide flowers have greenish stigma lobes and reddish streaked, petal-like tepals. Each nipple-like tubercle has 1 or 2 central spines and 10 to 12 radial spines. These low, flat cacti grow at elevations above 3500 feet (1067 m).
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