Hordeum jubatum L.

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The New York
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BOTANICAL
Ney .Yofk Botanical Garden
1721188"
PLANTS OF BRITISH COLUMBIA, CANADA
Hordeum jubatum x Elymus trachycaulus
Poaceae: Triticeae
Chilko River, about 17 km west southwest of Alexis Creek on Highway 20 and 5.7
km south on a dirt road. 52° 5.94’N 123° 28.39’W.
Elevation 692 m. Dry, sandy hills; collected Elymus trachycaulus along roadside
and on disturbed bank of silt/clay, Associated species: Melllotus alba, Medicago
sativa, Chrysothamnus nauseosus, Artemisia frigida. Large intergrading
population of several species, that appear to be hybridizing and introgressing.
Mail components: Hordeum jubatum, hybrid of H. jubatum and Elymus
trachycaulus, Pseudoroegneria spicata; Thinopyrum ponticum, and two variants
of Elymus trachycaulus, one unawned, the other long-awned, and intermediates.
Variation noted on seed bags. The long-awned plants were more common in the
less disturbed vegetation.
Roland von Bothmer 19.96 s. n.
Mary E. Barkworth
August 10, 1996
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