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New taxa of Corispermum L. (Chenopodiaceae), with preliminary comments on the taxonomy of the genus in North America



New taxa of Corispermum L. (Chenopodiaceae), with preliminary comments on the taxonomy of the genus in North America



Novon 5(4): 340-353



Five new species and three varieties of Corispermum L. (Chenopodiaeeae) are described from North America. Corispermum pacificum Mosyakin and C. pallidum Mosyakin are restricted to the Pacific Northwest; C. welshii Mosyakin is known from Utah and adjacent parts of Wyoming; C. navicula Mosyakin occurs in Colorado and probably adjacent states; C. hookeri Mosyakin is known from Canada. Corispermum pacificum is closely related to the Asian taxa C. crassifolium Turczaninov and C. maynense Ignatov; C. pallidum is possibly related to C. macrocarpum Bunge ex Maximowicz; the three remaining new taxa and all other native North American taxa are allied to the C. pallasii Steven aggregate. The nomenclature of C. pallasii (= C. leptopterum (Ascherson) Iljin = C. sibiricum Iljin subsp. baicalense Iijin = C. bjelorassicum Klokov and Krasnova), C. villosum Rydberg, and C. americanum (Nuttall) Nuttall is discussed. Three new varieties are described: C. americanum var. rydbergii Mosyakin, C. hookeri var. pseudodeclinatum Mosvakin, and C. ochotense var. alaskanum Mosyakin. Corispermum ochotense Ignatov, a species recently described from the northeastern part of the Russian Far East, is reported from Alaska and northwestern Canada, where it is represented by two varieties. Corispermum ochotense var. alaskanum differs from the typical variety in having larger fruits. Preliminary results of a study of the genus in North America are discussed.

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Accession: 009095453

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DOI: 10.2307/3391962


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