Difference between revisions of "Buckleya"
Amer. J. Sci. Arts 45: 170. 1843. name conserved
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--><p><i>Buckleya</i> is disjunct between eastern North America and Asia. Based on morphologic features such as the deciduous sepals, W. N. Carvell and W. H. Eshbaugh (1982) proposed that <i>B. distichophylla</i> is most closely related to B. graebneriana Diels of China, a hypothesis supported by the molecular phylogenetic analysis of Li J. H. et al. (2001).</p> | --><p><i>Buckleya</i> is disjunct between eastern North America and Asia. Based on morphologic features such as the deciduous sepals, W. N. Carvell and W. H. Eshbaugh (1982) proposed that <i>B. distichophylla</i> is most closely related to B. graebneriana Diels of China, a hypothesis supported by the molecular phylogenetic analysis of Li J. H. et al. (2001).</p> | ||
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| + | |id=carvell1982a | ||
| + | |text=Carvell, W. N. and W. H. Eshbaugh. 1982. A systematic study of the genus Buckleya (Santalaceae). Castanea 47: 17–37. | ||
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| + | |id=li2001a | ||
| + | |text=Li, J. H., D. E. Boufford, and M. J. Donoghue. 2001. Phylogenetics of Buckleya (Santalaceae) based on ITS sequences of nuclear ribosomal DNA. Rhodora 103: 137–150. | ||
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|family=Thesiaceae | |family=Thesiaceae | ||
|distribution=e United States;e Asia (China;Japan). | |distribution=e United States;e Asia (China;Japan). | ||
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|publication title=Amer. J. Sci. Arts | |publication title=Amer. J. Sci. Arts | ||
|publication year=1843 | |publication year=1843 | ||
|special status= | |special status= | ||
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|genus=Buckleya | |genus=Buckleya | ||
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Latest revision as of 19:18, 5 November 2020
Shrubs, dioecious. Stems hairy. Leaves opposite or subopposite, distichous to decussate. Inflorescences: staminate 1–3[–5] dichasia, pistillate flowers solitary, subtended by 2 pairs of decussate, deciduous bracts. Pedicels: staminate present, pistillate absent. Flowers unisexual. Staminate flowers: hypanthium absent; sepals 0; petals 4, post-staminal hairs absent; nectary squarish; stamens 4. Pistillate flowers: hypanthium completely adnate to ovary; sepals 4; petals 4; nectary squarish; ovules 3–4 per locule; stigma 4-lobed. Pseudodrupes: exocarp fleshy; pedicels not enlarging or becoming fleshy; sepals accrescent, deciduous [persistent], petals deciduous. x = 15.
Distribution
e United States, e Asia (China, Japan).
Discussion
5 species (1 in the flora).
The morphologic nature of the two floral whorls appearing at the fruit apex has received various interpretations. R. K. F. Pilger (1935) referred to the outer whorl as bracts and suggested that they are prophylls from two aborted side flowers of a dichasium. A simpler explanation, followed here, is that the outer whorl represents sepals and the inner whorl petals (F. H. Smith and E. C. Smith 1943; J. P. Der and D. L. Nickrent 2008).
Buckleya is disjunct between eastern North America and Asia. Based on morphologic features such as the deciduous sepals, W. N. Carvell and W. H. Eshbaugh (1982) proposed that B. distichophylla is most closely related to B. graebneriana Diels of China, a hypothesis supported by the molecular phylogenetic analysis of Li J. H. et al. (2001).