Prochnyanthes is a monotypic genus in the Agavaceae family from high mountains of Mexico. The base of the plant is a bulbous rhizome.
Prochnyanthes mexicana syn. Agave bulliana (also Bravoa bulliana, Prochnyanthes bulliana, Polianthes mexicana, and Prochnyanthes viridescens), is the only species and is found on dry rocky slopes in pine-oak grassland or in shaded moist ravines at 1150 to 3100 m. altitude in the states of Durango, Aguascalientes, Jalisco, Nayarit, Michoacán, and Zacatecas of Mexico. The flowers appear from late June to early September on spicate inflorescences 1 to 2 m. tall with 4 to 22 flowering nodes with paired flowers that are white tinged with grey-green or dull green on the exterior and red, white, or creamy on the interior.
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