Basionym: Yucca intermedia McKelvey, Yuccas S.W.U.S. 2:116, 1947.
Synonyms:
Yucca intermedia McKelvey. (1947) Yuccas of the southwestern
United States vol. 2:116, 1947.
Yucca intermedia var. ramosa McKelvey Yuccas of the S.W.U.S.
2:120, 1947.
Yucca baileyi var. intermedia (McKelvey) Reveal, Intermountain
Flora 6: 527-536 (1977)
Unpublished names:
Yucca glauca var. intermedia Mesa Garden seed list
Type location:
Just north of Town of Willard, elev. ca. 1920 m
Distribution:
Central New Mexico towards Mora Co., to San Miguel Co., Santa Fe Co.,
Bernalillo Co., Valencia Co., Torrance Co., De Baca Co. and North East
Soccoro Co. at 1500 to 2000 m elevation.
Short description of the species:
Plants acaulescent or sometimes forming a a short stem (rare!),
single rosettes or in small groups of 3 to 4 rosettes. Leaves pale
green to yellowish green, 30 - 60 cm long, very narrow 0,3 to 0,8 cm wide,
stiff (sometimes flexible!), straight, plano-convex. Margin of the leaves
white to grey, and with only few fibers.
Inflorescens 100 to 150
cm tall, usually a simple raceme, and very rarely a somewhat paniculate,
if so only in the lower part of the inflorescens!. Scape: starting
between the leaves. Flowers campanulate (bell shaped) or occasionally
somewhat globose (round), 5 to 6 cm long, cream to greenish occasionally
with pink stripes on the outer tepals, flowers sometimes in singles but
usually in two flowers together. Pistil about 3,2 cm long, . Fruit
5 to almost 6 cm long, 2 to 2,5 cm thick, sometimes constricted.
Seeds
black, shiny to dull, quite small 0,5 to 0,8, with a marginal wing.
Hardiness:
I have some experience with this species, it is not very hardy outside
without protection from winter moisture. If grown in a bed that are protected
against winter moisture and if the bed is well drained the plant will grow
into a very beautiful specimen.
My own Yucca baileyi ssp. intermedia:
191A Yucca baileyi ssp. intermedia, New Mexico, Taos Co.,
sown 1991, Mesa Garden #1991.68
received as
Yucca
glauca var. intermedia, many fibers.
grown in a large
pot that are inside the unheated greenhouse during the winter.
191B Yucca baileyi ssp. intermedia, New Mexico, Taos Co.,
sown 1991, Mesa Garden #1991.68.
received as
Yucca
glauca var. intermedia, many fibers,
grown in a bed
that are protected against winter moisture from October to May.
Photo by Benny Moeller Jensen, ©2000-2005
March 2000.
191C Yucca baileyi ssp. intermedia, New Mexico, Taos
Co., sown 1991, Mesa Garden #1991.68
received as
Yucca
glauca var. intermedia,
can handle few
winters un protected, but only badly!! now I protect is with a sheet of
glass in the winter.
336A Yucca baileyi ssp. intermedia, New Mexico, Bernalillo
Co., Albuquerque G 20 s1992 Mesa Garden #1991.6
received as
Yucca
glauca var. intermedia
grown in a large
pot that are inside the unheated greenhouse during the winter.
336B Yucca baileyi ssp. intermedia, New Mexico, Bernalillo
Co., Albuquerque, sown 1992 Mesa Garden #1991.6
received as
Yucca
glauca var. intermedia,
grown in a bed
that are protected against winter moisture from October to May.
912 Yucca baileyi ssp. intermedia, New Mexico, Albuquerque,
fh 1178.83, sown 1998.
grown in a large
pot that are inside the unheated greenhouse during the winter.
1054 Yucca baileyi ssp. intermedia, New Mexico, Albuquerque area, 1900 m. fh 1179.25, sown 2000
1055 Yucca baileyi ssp. intermedia, New Mexico, Albuquerque,
fh 1179.83, sown 1999
grown in a large
pot that are inside the unheated greenhouse during the winter.
Notes:
According to Webber this species is Yucca
glauca x Yucca elata.
Dave J. Ferguson did in a posting to the discussion group Hardycacti_etc on the subject "Yucca hybrids" comment that:
"The "Yucca glauca" parent is hard to peg down. There aren't three species in the group growing around Santa Fe, rather the plants in the area are variable. Most people just call them all Yucca glauca, but if you really look at them, you will find plants which match Yucca baileyi, Y. intermedia, and Yucca glauca (and these could all grow from seed from the same fruit). These aren't as variable in appearance as are plants from many other areas, but the pistil and fruits are rather variable in size, shape, and coloring. Probably best to call them "intermedia" since this is basically a name for varied intermediate populations where Yucca baileyi, Yucca glauca, Yucca elata, and Yucca angustissima blend anyway".
The above comment may suggest that the plants in this area needs further investigation to determine which status they should have: Hybrids, species, subspecies or just natural variation within Yucca baileyi (or Yucca glauca!)
Pictures:
Picture of a cultivated plant in Hungary.
Note that the inflorescens is somewhat paniculate!, maybe this isn't
a Yucca baileyi ssp. intermedia?
Photo by Andrew Treer, Budapest, ©1999-2005.
Reference:
FERGUSON, D. J., posting to Hardycacti_etc. Thu, 12 Oct. 2000 09:02:04
-0700 (PDT) "Re: Yucca hybrid"
HOCHSTAETTER, F., Cactaceae-Review IRT, Germany, 1 (2): 21 (1998)
HOCHSTAETTER, Navajo County Web page: documentation of nomenclature
HOCHSTAETTER, F., (2000), YUCCA (vol. I): 46-47 (Yucca baileyi
ssp. intermedia)
MCKELVEY, S.D., Yuccas of the southwestern United States vol. 2:
, 1947. Yucca intermedia var. ramosa
MCKELVEY, S.D., Yuccas of the southwestern United States vol. 2:116,
1947. Yucca intermedia McKelvey.
MCKELVEY, Yuccas of the southwestern United States, Part two (1947)
REVEAL, Intermountain Flora, Vascular Plants of the Intermountain West,
527-536, 1977
WEBBER, Agric. Monograph U.S.D.A. 17:56-59 (1953) (Yucca intermedia
as
a syn for Yucca glauca x Yucca
elata)
WEBBER, Agric. Monograph U.S.D.A. 17:62-65 (1953) (Yucca
intermedia
var.
ramosa
as a syn for Yucca
glauca x Yucca elata)
TRELEASE, 1902 Yucca glauca Trelease
Missouri Bot. Gard. Ann. Rpt. 13: (1902)
! Photo gallery ! Yucca ! Hardy Cactus ! E-mail ! DANSK ! Home ! Caudex index ! Cucurbitaceae (Danish text!) ! Links ! Search ! NEWS ! Wanted !
Copyright © 1998-2005
Benny Møller Jensen
Hjørring
Danmark