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Author: Henry Allan Gleason
Publisher:
ISBN:
Category : Compositae
Languages : en
Pages : 116
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Author: Henry Allan Gleason
Publisher:
ISBN:
Category : Compositae
Languages : en
Pages : 116
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Book Description
Author: New York Botanical Garden
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 536
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Author:
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 330
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Author:
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 544
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Author:
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 532
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Author: T.J. Mabry
Publisher: Springer Science & Business Media
ISBN: 3709169283
Category : Science
Languages : en
Pages : 126
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Book Description
T. J. MABRY and G. W AGENITZ The half-day symposium on "Multidisciplinary approaches to the systematics of Compositae", held as part of the XIV International Botanical Congress in Berlin, on July 26, 1987, was designed to complement the University of Reading Compositae Conference (1975). The latter had yielded two impressive and thorough volumes on "The biology and chemistry of the Compositae", which were edited by HEYWOOD, HARBORNE & TURNER (1977). The 1987 Berlin Symposium did not attempt to update the information from the earlier conference but instead focussed on selected new methods for investigating the systematics of the family as well as a few examples of new systematic approaches with classical methods. From mapping chloroplast DNA restriction sites JANSEN, PALMER, and MI CHAELS reported the astonishing fact that, with the exception of one group (the subtribe Barnadesiinae of the tribe Mutisieae), all investigated other members of Compositae exhibit a characteristic inversion in their chloroplast DNA, suggesting that the inversion occurred early in the evolution of the family and that at least its major part is monophyletic. Within those groups with the inverted segment, chloroplast DNA also suggests that most of the conventionally recognized tribes are also monophyletic. This lends high credit to our predecessors who laid the foundations for the taxonomic system of the Compositae. These chloroplast DNA studies have already been published and are not included here (JANSEN & PALMER 1987, 1988).
Author: New York Botanical Garden
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 534
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Book Description
Contains the Report of the director and other administrative officers, together with occasional contributions on scientific subjects, but beginning in 1933 the Annual report of the director was published in It's Journal.
Author: Lars Peter Kvist
Publisher:
ISBN:
Category : Gesneriaceae
Languages : en
Pages : 464
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Book Description
Seventeen species of Pearcea (Gesneriaceae) are recognized, nine of which are new: Pearcea bella, P. bilabiata, P. cordata, P. fuscicalyx, P. glabrata, P. gracilis, P. grandifolia, P. intermedia, and P. strigosa. Of the remaining eight species, two were originally described in Pearcea, one is transferred herein from Kohleria, and five come from Parakohleria, a genus placed in synonymy herein. Pearcea occurs mainly on the eastern Andean slopes of Colombia (5 species), Ecuador (12 species), Peru (6 species), and Bolivia (1 species), and one species also occurs on the western Andean slopes in Ecuador. The largest number of species appears to occur in Ecuador, although additional species may occur in less explored parts of Peru. Pearcea differs from related and similar genera in the Gloxinieae by having fleshy capsules dehiscing by two valves and exposing a sticky seed mass. All species are herbs, usually with bright red flowers, and are usually found in the shady, humid forest understory, often near small streams. Hybridization, local speciation, and polymorphic variation may complicate the species delimitation. The variable Pearcea sprucei occurs throughout nearly the entire range of the genus (and includes the only accepted variety, var. parviflora), but most species are rare and local.
Author: Henry Allan Gleason
Publisher:
ISBN:
Category : Vernonia
Languages : en
Pages : 52
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Author: New York Botanical Garden
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 316
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Book Description
