Yucca harrimaniae subsp. sterilis
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Yucca harrimaniae subsp. sterilis in flower in May in Utah |
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| Yucca harrimaniae subsp. sterilis | ||||||||||||
| ( Neese & SLWelsh ) Hochstätter |
Yucca harrimaniae subsp. sterilis (English common name "Sterile Uintah Basin Yucca") is a subspecies of the plant species Yucca harrimaniae in the asparagus family (Asparagaceae).
description
Yucca harrimaniae subsp. sterilis grows solitary and spreads via runners. The root system is like the subspecies Yucca harrimaniae subsp. neomexicana rhizome-like . In contrast to the subspecies Yucca harrimaniae subsp. harrimaniae , the leaves stand apart and partly incline to the ground. The stiff, blue-green leaves are 10 to 30 cm long and 2 cm wide. The leaf margins form fine fibers.
The short inflorescence beginning in the leaves becomes 40 cm high. The pendulous, bell-shaped, spherical, hermaphrodite flowers are 2 to 4 cm long and 2 to 3 cm in diameter. Of the six white to cream-colored bracts of the same shape , the outer ones are sometimes covered in purple. The flowering period extends from May to June (in recent years, F. Hochstätter discovered capsule fruits with ripe seeds on the fruit stands.).
Occurrence
Yucca harrimaniae subsp. sterilis is distributed in the US state of Utah in plains, on flat sandy hills and in grasslands at altitudes between 1,300 and 1,700 meters. This species grows together with Sclerocactus wetlandicus , Sclerocactus wetlandicus subsp. ilseae , Pediocactus simpsonii and various species of cacti .
Yucca harrimaniae subsp. In Central Europe, sterilis is frost hardy to –20 ° C. It is rare in collections. In Germany, Mannheim, in the collection of F. Hochstätter, twelve-year-old specimens grow unprotected in the open air.
Systematics
The botanical name was chosen after the sterility of the species. The valid description by Fritz Hochstätter under the name Yucca harrimaniae subsp. sterilis was published in 1998.
A synonym is Yucca harrimaniae var. Sterilis Neese & SLWelsh (1986).
photos
Yucca harrimaniae subsp. sterilis :
With short inflorescence in Utah
Young plant with Sclerocactus wetlandicus ssp. ilseae in Utah
Individual evidence
literature
- Yucca harrimaniae subsp. sterilis . In: Fritz Hochstätter (Ed.): Yucca (Agavaceae) . Volume 1 USA, self-published. 2000, p. 35, photo material p. 90, Yucca I Front cover, back cover, p. 232-233, description p. 210, p. 233, ISBN 3-00-005946-6 .