Yucca species

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Scientific Name Yucca glauca USDA PLANTS Symbol YUGL
Common Name Great Plains Yucca, Soapweed ITIS Taxonomic Serial No. 43142
Family Asparagaceae (Asparagus) SEINet
Reference
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Description Life zones and habitat: Plains and foothills (3800 to 9000 ft.); Dry, sandy or limestone soils in grasslands and disturved areas; very widespread.
Plant: Round yucca shrub up to 24 inches tall (excluding inflorescence and fruit stem); often colony-forming with up to 15 plants.
Leaves: Rosettes of pale green, concave, somewhat flexible leaf blades, linear to linear-lanceolate, 16 to 24 inches long and up to 1/2-inch wide; margins are white and toothless with white threads; usually very sharp tips.
Inflorescence: Flowering stalk 20 to 40 inches tall arising within and above rosette; large bell-shaped, hanging flowers with white or greenish-white tepals, 1-3/4 to 2 inches long; white filaments 5/8 to 1-1/8 inches long; green pistil 1 to 1-1/2 inches long and dark green style.
Bloom Period: May to July.
Fruit: Erect, green, cylindrical fruit capsules, not constricted, 2 to 3+ inches long.
References: "Flora of Colorado" by Jennifer Ackerfield and SEINet.
BONAP Distribution Map
Colorado Status:
Native
Scientific Name Yucca harrimaniae USDA PLANTS Symbol YUHA
Common Name Spanish Bayonet ITIS Taxonomic Serial No. 43144
Family Asparagaceae (Asparagus) SEINet
Reference
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Description Life zones and habitat: Semidesert and mesas (4500 to 8000 ft.); dry desert slopes, foothills and plateaus.
Plant: Short, round yucca shrub up to 20 inches tall (excluding inflorescence and fruit stem); often colony-forming.
Leaves: Rosettes of pale green, concave, rigid leaf blades, linear- or spatulate-lanceolate, widest near middle, 12 to 20 inches long and 3/4 to 1-5/8-inches wide; margins are toothless, with white or brown threads; very sharp tips.
Inflorescence: Flowering stalk 14 to 28 inches tall arising within or just above rosette; large bell-shaped, hanging flowers with creamy-white, yellow or greenish-yellow tepals usually tinged purple, 1-3/4 to 2 inches long; filaments 5/8 to 1-1/8 inches long; pale green pistil 1 to 1-1/2 inches long and pale to bright green style.
Bloom Period: May and June.
Fruit: Erect cylindrical fruit capsules usually deeply constricted toward center 1-1/4 to 2-3/8 inches long
References: "Flora of Colorado" by Jennifer Ackerfield and SEINet.
BONAP Distribution Map
Colorado Status:
Native

© Tom Lebsack 2021