Taxonomy and Distribution of Clematis, Sect. Atragene (Ranunculaceae), in North America

Pringle, James S.

doi:10.2307/2805705

Cited by 5 publications

(9 citation statements)

References 23 publications

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“…DC. (Pringle, 1971; Johnson, 1997; Grey‐Wilson, 2000). De Candolle's sectional treatment was adopted by some taxonomists (Tamura, 1987; Johnson, 1997; Wang & Li, 2005), whereas others treated the Atragene group either as a subsection of sect.…”

Section: Brief Taxonomic Historymentioning

confidence: 99%

“…Pringle (1971) revised the North American Atragene group and recognized two species and three varieties based on division types of leaves and shapes of sepals. In his later worldwide revision, Pringle (1991) recognized five species: C. occidentalis , Clematis columbiana (Nutt.)…”

Section: Brief Taxonomic Historymentioning

confidence: 99%

“…The treatment of Pringle (1971) was followed for the North American species except C. occidentalis var. dissecta (Hitchc.)…”

Section: Morphological and Morphometric Analysesmentioning

confidence: 99%

“…It grows in an isolated region in Washington state, USA. Pringle (1971) distinguished this variety by its deeply dissected leaves, tufted stems, and elongate peduncles. However, we noticed that elongate stems and undivided leaves also occur in C. occidentalis var.…”

Section: Morphological and Morphometric Analysesmentioning

confidence: 99%

“…In contrast, C. occidentalis var. grosseserrata ranges from Wyoming and Utah, USA, to central British Columbia and Alberta, Canada, and can inhabit hills and mountains as low as 300 m. The distinctive distribution pattern of C. occidentalis was explained by Pringle (1971) that they may have developed from two refugia after the Wisconsin glacial period and the absence of appropriate conditions in the central regions might also account for the disjunctive distribution pattern.…”

Section: Geographical Distribution and Ecologymentioning

confidence: 99%

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A revision of Clematis sect. Atragene (Ranunculaceae)

Yang

Xie

2009

J of Sytematics Evolution

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Clematis sect. Atragene is revised in this paper based on the examination of a large number of herbarium specimens, extensive field observations, and morphometric analyses. Brief taxonomic history and geographical distribution of the section are given, the relationships among the species are discussed, and the evolutionary trends of some characters in the section are evaluated. The staminodes of the plants in this section may have evolved from the outer stamens with petaloid filaments and gradually disappearing anthers. Subsequently, they may have evolved in two different ways. One possibility is that the staminodes elongate and become lanceolate, as long as sepals, and their apices turn into attenuate. The other is that the staminodes are spathulate, but not elongating, as long as stamens, and their apices turn into retuse from obtuse and rounded. The evolutionary trend of sepals may be from thin to thick in texture, and the veins from non-prominent to prominent. As a result, five new series are established and nine species, two subspecies and nine varieties (including three new ranks) are recognized in this section. An identification key is provided, and each taxon is described and illustrated. Clematis sibirica and Clematis ochotensis are treated as subspecies of Clematis alpina due to their subtle differences and lack of, or few, overlapping distributions. Clematis fusijamana and Clematis fauriei are recognized as varieties of C. alpina ssp. ochotensis for the continuous variation of the velutinous strips on the sepal margins. Clematis iliensis is treated as variety of C. alpina ssp. sibirica for the continuous variation of leaf division types. Extensive variations in sepal color and basal caruncle size support degrading Clematis chiisanensis as a variety of Clematis koreana. The North American ser. Occientales may be primitive, whereas ser. Macropetalae may be the most advanced taxon in this section. Ser. Alpinae and ser. Koreanae are closely related to each other. However, the systematic position of ser. Tomentosae cannot be determined based on morphological characters alone in the present study.

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Section: Brief Taxonomic Historymentioning

confidence: 99%

Section: Brief Taxonomic Historymentioning

confidence: 99%

“…The treatment of Pringle (1971) was followed for the North American species except C. occidentalis var. dissecta (Hitchc.)…”

Section: Morphological and Morphometric Analysesmentioning

confidence: 99%

Section: Morphological and Morphometric Analysesmentioning

confidence: 99%

Section: Geographical Distribution and Ecologymentioning

confidence: 99%

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A revision of Clematis sect. Atragene (Ranunculaceae)

Yang

Xie

2009

J of Sytematics Evolution

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Areal- und Florenkunde (Floristische Geobotanik)

Jäger

1972

Fortschritte Der Botanik

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THE TYPIFICATION OF THE LINNAEAN NAMES ATRAGENE ALPINA AND A. SIBIRICA (RANUNCULACEAE)

Serov¹,

Jarvis

1988

TAXON

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Summary Atragene alpina L. is typified by the specimen in Herb. Burser XVII: 39 (UPS) and A. sibirica L. by 711.7 (LINN). The latter is shown to be a nomen ambiguum. However, current usage for both names in Clematis is maintained, the correct names in Clematis being C alpina (L.) Miller and C. sibirica Miller, respectively. In Atragene the correct names for these two species are A. alpina L. and A. speciosa Weinmann.

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Taxonomy and Distribution of Clematis, Sect. Atragene (Ranunculaceae), in North America

Cited by 5 publications

References 23 publications

A revision of Clematis sect. Atragene (Ranunculaceae)

A revision of Clematis sect. Atragene (Ranunculaceae)

Areal- und Florenkunde (Floristische Geobotanik)

THE TYPIFICATION OF THE LINNAEAN NAMES ATRAGENE ALPINA AND A. SIBIRICA (RANUNCULACEAE)

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