Scientific Name
Dasylirion longissimum Lem.
Common Name(s)
Mexican Grass Tree
Scientific Classification
Family: Asparagaceae
Subfamily: Nolinoideae
Genus: Dasylirion
Etymology
The specific epithet "longissimum" (pronounced "lon-JIS-ee-mum") means "longest, very long" and refers to the exceptionally long, narrow leaves of this species.
Origin
Dasylirion longissimum is native to Mexico. It occurs in southern San Luís Potosí, Queretaro, and Hidalgo.
Description
Dasylirion longissimum is a large succulent with long, arching, grass-like leaves that radiate symmetrically out of an upright or partially reclining, woody trunk skirted with old leaves. The trunk slowly grows and can reach a height of 13.1 feet (4 m). The leaves are glaucous green, spoon-shaped at the base, gradually narrowing above, and have nearly toothless margins. They can measure up to 4.6 feet (1.4 m) long and 0.5 inches (1.2 cm) wide.
A spike with white to brownish-yellow flowers usually appears from summer to fall and can grow up to 13.1 feet (4 m) tall. This plant is dioecious, with male and female flowers on separate plants.
How to Grow and Care for Dasylirion longissimum
Hardiness: USDA hardiness zone 8b to 10b: from 15°F (-9.4°C) to 40°F (4.4°C).
Dasylirions are slow-growing, carefree, durable, drought-tolerant plants. However, they grow faster when watered well (don't water the crown, as it can rot easily). They should be placed in a sunny, well-drained area, with additional summer water in dry climates.
These make great specimen plants for xeriscape gardens and blend well in either tropical or arid gardens. Small plants are relatively inexpensive, but larger ones are a fortune. These make excellent potted specimens, and their symmetrical form provides a striking focal point.
They thrive best in full sun but can be grown with some shade and humidity. Plant in very fast-draining soil and provide little or no water in winter. Treat it like a succulent. Best where winter temperatures stay above 50°F (10°C), though some frost can occur. Plants in containers can be moved inside during longer cold spells.
See more at How to Grow and Care for Dasylirion.
Links
- Back to genus Dasylirion
- Succupedia: Browse succulents by Scientific Name, Common Name, Genus, Family, USDA Hardiness Zone, Origin, or cacti by Genus
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