Yucca × schottii

Schott's yucca
Conservation status
	; Least Concern (IUCN 3.1)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Order:	Asparagales
Family:	Asparagaceae
Subfamily:	Agavoideae
Genus:	Yucca
Species:	Y. × schottii
Binomial name
	Yucca × schottii; Engelm.
Synonyms
	Sarcoyucca schottii (Engelm.) Linding. ; Yucca × brasiliensis Sprenger ; Yucca × macrocarpa Engelm. ; Yucca × puberula Torr., nom. illeg. ;

Yucca × schottii is a plant species in the genus Yucca, native to southern Arizona, southwestern New Mexico, and the northern parts of Sonora and Chihuahua. The common names are Schott's yucca, hoary yucca, and mountain yucca. The "×" in the name indicates that this is a nothospecies, regarded as being a natural hybrid between two other species. In this case, Yucca × schottii is believed to have originated as a hybrid between Y. baccata and Y. madrensis. Yucca × schottii is firmly established and does reproduce freely in the wild.^[3]

Yucca × schottii is called mountain yucca because it is found at higher elevations than other tree-like yuccas. It occurs in the mountain ranges at the north of the Sierra Madre Occidental cordillera. It is found in extreme southeast Arizona, then the smaller bootheel region of southwest New Mexico, and the neighboring northern Mexico states of Sonora and extreme northwest Chihuahua.^[4] Most of its range, about half is in Arizona.^[4] The mountainous regions of Arizona are in the northeast Sonora Desert, as well as Sonora; the region of New Mexico–Chihuahua lies on the extreme northwest border of the Chihuahuan Desert. This specific region at the intersection of these two deserts, is a Basin and Range area, with sky islands, named the Madrean Sky Islands for the Madrean pine forests of the Sierra Madre Occidental.^[4]

Yucca × schottii is a tall species up to 5 m in height, with thin trunks rarely more than 30 cm across, branching occasionally well above ground. Leaves are lanceolate, broad and tapering at both ends, stiff and rigid, up to 60 cm long and up to 8 cm wide, with a hard spine forming the tip. Flowers are white. Fruit is fleshy and egg-shaped.^[5]^[6]^[7]

Mountain yucca
(Schott's yucca)

References

^ Salywon, A.; Hodgson, W.; Clary, K.; Solano, E.; Puente, R.; Ayala-Hernández, M.M. (2020). "Yucca schottii". IUCN Red List of Threatened Species. 2020. Retrieved 7 June 2021.
^ "The Plant List: A Working List of All Plant Species".
^ CONABIO. 2009. Catálogo taxonómico de especies de México. 1. In Capital Nat. México. CONABIO, México D.F.
^ ^a ^b ^c Little Jr., Elbert L. (1976). "Map 208, Yucca schottii". Atlas of United States Trees. Vol. 3 (Minor Western Hardwoods). US Government Printing Office. LCCN 79-653298. OCLC 4053799.
^ Engelmann, Georg. 1873. Transactions of the Academy of Science of St. Louis 3: 46
^ Shreve, F. & I. L. Wiggins. 1964. Vegetation and Flora of the Sonoran Desert 2 vols. Stanford University Press, Stanford.
^ McKelvey, Susan. 1938. Yuccas of the Southwestern United States. Jamaica Plain: Arnold Arboretum.

External links

[IUCN-1] Salywon, A.; Hodgson, W.; Clary, K.; Solano, E.; Puente, R.; Ayala-Hernández, M.M. (2020). "Yucca schottii". IUCN Red List of Threatened Species. 2020. Retrieved 7 June 2021.

[2] "The Plant List: A Working List of All Plant Species".

[3] CONABIO. 2009. Catálogo taxonómico de especies de México. 1. In Capital Nat. México. CONABIO, México D.F.

[Little-4] Little Jr., Elbert L. (1976). "Map 208, Yucca schottii". Atlas of United States Trees. Vol. 3 (Minor Western Hardwoods). US Government Printing Office. LCCN 79-653298. OCLC 4053799.

[5] Engelmann, Georg. 1873. Transactions of the Academy of Science of St. Louis 3: 46

[6] Shreve, F. & I. L. Wiggins. 1964. Vegetation and Flora of the Sonoran Desert 2 vols. Stanford University Press, Stanford.

[7] McKelvey, Susan. 1938. Yuccas of the Southwestern United States. Jamaica Plain: Arnold Arboretum.

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