Blue-green palm lily
| Blue-green palm lily | ||||||||||||
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Yucca glauca in autumn in South Dakota |
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| Scientific name | ||||||||||||
| Yucca glauca | ||||||||||||
| Nutt. |
The blue-green palm lily ( Yucca glauca ) (English common name : Great Plains Yucca) is a species of palm lily ( Yucca ) in the asparagus family (Asparagaceae).
description
The blue-green palm lily grows solitary, trunkless (but sometimes with trunks up to 60 cm in height) to group-forming, with ten to twelve rosettes, 2 to 3 meters wide. The thin, soft, flexible, green, gray, sometimes white with fine fibers at the edges, leaves are 20 to 70 cm long and 1 to 2 cm wide.
The racemose inflorescence that begins in the leaves becomes 1 to 2 meters high. The bell-shaped, spherical, white, cream-colored flowers have a length and a diameter of 4 to 6 cm.
The flowering period extends from April to June.
The number of chromosomes is 2n = 60.
Occurrence
The blue-green palm lily is found in the USA in the prairies of the west in the states of Montana , Nebraska , South Dakota , North Dakota , Colorado , Wyoming , Oklahoma . Kansas and New Mexico distributed in plains at altitudes between 800 and 2600 meters. This species often grows in association with various types of cacti .
The blue-green palm lily is frost hardy to minus 18 ° C in Central Europe . It is one of the toughest species in the genus.
Systematics
The first description by Thomas Nuttall under the name Yucca glauca was published in 1813.
The following subspecies are distinguished:
- Yucca glauca nut. subsp. glauca
- Yucca glauca subsp. stricta (Sims) Hochstätter
- Yucca glauca subsp. albertana Hochstätter
Yucca glauca is a species of the Section Chaenocarpa Glaucae series .
photos
Yucca glauca :
Distribution area.
14 year old specimen with inflorescence in Mannheim.
literature
- Yucca glauca . Fritz Hochstätter (Ed.): Yucca (Agavaceae) . Volume 1 USA, self-published. 2000, pp. 51–55, photo material pp. 104–105, first description pp. 190–193, pp. 237–23 ?. ISBN 3-00-005946-6 .
