Yucca angustissima ssp. avia


Yucca angustissima ssp. avia (Reveal) Hochstaetter
Cactaceae-Review, Germany, 1 (2): 21, 1998.

Synonyms:
Yucca angustissima var. avia Reveal, Intermountain Flora, Vascular Plants of the Intermountain West, 534-536, 1977.

Type location:
M. E. JONES 5639a, Loa Pass, Puite Co., Utah, 2.550 m elevation, 17. July 1898,
Holotype deposited at US.

Distribution:
Central Utah at 2400 m to 2700 m, it grows with Pediocactus simpsonii and different Opuntia species.

Short description of the species:
Plant: acaulescent, single rosettes or small clumps. Leaves: erect or slightly flaccid, 40 cm to 60 cm long, 5 mm to 15 mm wide, concavo-convex, green to greenish-yellow, edge white, with fibers. Inflorescence: 50 cm to 180 cm tall, flowers are 35 to 45 mm long
 
 
Seeds of #1361 Yucca angustissima aff. avia, Utah, Rock Ford Creek, 1800 m., fh 1181.1.
Sown 2000
Seeds of #1360 Yucca angustissima ssp. avia, Utah, Manti La Sal area 1500 m., fh 1181.
Sown 2000

Pictures:
 
Yucca angustissima ssp. avia
Grown in Alexander Heim's garden in Greece. Copyright 2007 Alexander Heim.
Yucca angustissima ssp. avia
Grown in Alexander Heim's garden in Greece. Copyright 2007 Alexander Heim.
Yucca angustissima ssp. avia
Grown in Alexander Heim's garden in Greece. Copyright 2007 Alexander Heim.
Yucca angustissima ssp. avia
Grown in Alexander Heim's garden in Greece. Copyright 2007 Alexander Heim.

I have no pictures available of this species in habitat, if you have a photo that I may use please let me know

My own plants:
#1047 Yucca angustissima ssp. avia, Utah, Hightop Plateau 2600 m., fh 1179.29 sown 1999
#1360 Yucca angustissima ssp. avia, Utah, Manti La Sal area 1500 m., fh 1181 sown 2000
#1361 Yucca angustissima aff. avia, Utah, Rock Ford Creek, 1800 m., fh 1181.1, sown 2000.

Hardiness:
I have a few plants planted in my protected deb, which is covered from October to April against winter moisture Those plants live, but they grow very slowly. I do not think it is the winter which is the problem, but that the summers here in northern Denmark are too cold. As you can see on the photos above from Alexander Heim's garden in Greece, do they grow well there.

Reference:
HOCHSTAETTER, Cactaceae-Review, Germany, 1 (2): 21, 1998.
REVEAL, Intermountain Flora, Vascular Plants of the Intermountain West, 534-536, 1977.



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