Ecotypic Variation in Medusahead, an Introduced Annual Grass

McKell, Cyrus M.; Robison, John P.; Major, Jack

doi:10.2307/1933458

Cited by 42 publications

(22 citation statements)

References 26 publications

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“…Genetic variability may be related to geographic isolation of populations caused by the mountainous terrain or to environmental differences related to altitude or other ecological factors. In other species there is evidence for the existence of ecotypie variation in seed germination (Stearns and Olson, 1958;Vaartaja, 1959;McKell, Robinson, and Major, 1962;Mergen, 1963). Cross pollination, however, of this inisect-pollinated species should not be eliminated as a possibility for gene flow since bumblebee foragers can carry pollen over great vertical distances with the aid of winds and thermal updrafts (Macior, personal communication).…”

Section: Discussion the Nature Of Dormancy In Achenes Of B Bistortomentioning

confidence: 99%

Variability in Germination of Bistorta bistortoides (Pursh) Small

Allessio¹

1969

Bulletin of the Torrey Botanical Club

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Section: Discussion the Nature Of Dormancy In Achenes Of B Bistortomentioning

confidence: 99%

Variability in Germination of Bistorta bistortoides (Pursh) Small

Allessio¹

1969

Bulletin of the Torrey Botanical Club

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“…Possible cases of this may be the Medusa-head grass Taeniatherum asperum (McKell et al 1962) and Bromus tectorum (Mack 1981).…”

Section: Minor and Major Weedsmentioning

confidence: 99%

Patterns of Plant Invasion in North America

Baker¹

1986

Ecological Studies

158

106

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Twenty years ago, an international conference on The Genetics of Colonizing Species was held in Asilomar. The proceedings of the conference were published in the next year (Baker and Stebbins 1965). The plant materials that were discussed then were mainly weeds. * This would seem to be a restriction but it is a fact that most colonizing plants are weeds. In North America, except for the sea shores, the moraines in front of receding glaciers, and the recolonization of devastated areas around Mount St. Helens, there are few opportunities for introduced plants to take part in plant succession. Otherwise, the disturbance in the natural system that almost always seems to be necessary for plant invaders to be successful is caused by human activities.

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“…Possible cases of this may be the Medusa-head grass Taeniatherum asperum (McKell et al 1962) and Bromus tectorum (Mack 1981). Possible cases of this may be the Medusa-head grass Taeniatherum asperum (McKell et al 1962) and Bromus tectorum (Mack 1981).…”

Section: Minor and Major Weedsmentioning

confidence: 99%

“…Seventy-five new aliens were reported out of a total of over 180 (St. John 1937) within the same area in which Piper and Beattie had collected for their 1914 Flora. Mack within eastern Washington by 1901(McKell et al 1962). Included within this list of new arrivals are several species that are common today (Arctium minus, Centaurea jacea, Centaurea repens , Holosteum umbellatum, Hypericum perJoratum, Poa bulbosa).…”

Section: Plant Invasion Into the Intermountain Westmentioning

confidence: 99%