Morales, JF; Endress, M E; Liede-Schumann, S: Systematics of Prestonia (Apocynaceae: Apocynoids: Echiteae) 80 years after Woodson, Annals of the Missouri Botanical Garden, 102, 520-541 (2017), doi:https://doi.org/10.3417/D-17-00002A
Stichworte: Apocynoids, classification, ITS, molecular phylogeny, Prestoniinae, systematics.
Abstract:
Prestonia R. Br. (apocynoids, Echiteae) comprises ca. 58 species, which are lianas with eglandular leaves, axillary or terminal cymose inflorescences, sepals with a single colleter, flowers usually with an annular corona around the mouth and/or free corona lobes, follicular fruits, and truncate seeds that are comose at themicropylar end. Three infrageneric classifications have been proposed in the last 110 years, all of them based only on morphological characters and none of which have been tested with molecular data. In the present study, based on the analyses of 62 nuclear and 258 chloroplast sequences from 65 species, we test the monophyly of Prestonia as well as the infrageneric classifications proposed for the genus. Prestonia was shown to be monophyletic, but the infrageneric sections proposed by Schumann, Woodson, and Pichon are all non-monophyletic. We propose a new infrageneric classification for Prestonia, recognizing six sections: Coalitae Woodson, Denticulatae J. F. Morales, M. E. Endress & Liede, Exsertae J. F. Morales, M. E. Endress & Liede, Haemadictyon (Lindl.) Baill., Mollis J. F. Morales, M. E. Endress & Liede, and Prestonia. A key to the sections is provided. Prestonia pickelii Markgr. is removed from the synonymy of P. quinquangularis (Jacq.) Spreng. and resurrected as an accepted species. We provide a brief overview of the prolific groundbreaking work of Robert E. Woodson and Marcel Pichon in the Apocynaceae and Prestonia, and respectfully pay homage to their invaluable contributions to our knowledge of the family.
Aktuelle Termine


BayCEER-Kolloquium:
Do. 14.12.2017
A Molecular Scale Approach: X-Ray Absorption Spectroscopy in Environmental Study
Do. 21.12.2017
Silicon in biogeochemistry
Ökologisch-Botanischer Garten:
So. 07.01.2018
Stärk´ anlaufen: Winterspaziergang im ÖBG
So. 07.01.2018
Musikalischer Jahresbeginn mit den Rockin´ Dinos
Workshop:
Do. 14.12.2017
Workshop on synchrotron-based X-ray absorption spectroscopy
Wetter Versuchsflächen
Luftdruck (356m): 961.1 hPa
Lufttemperatur: 0.3 °C
Niederschlag: 1.2 mm/24h
Sonnenschein: 3 h/d
Wind (Höhe 17m): 8.4 km/h
Wind (Max.): 27.0 km/h
Windrichtung: S

...mehr
Globalstrahlung: 2 W/m²
Lufttemperatur: -2.3 °C
Niederschlag: 0.1 mm/24h
Sonnenschein: <1 h/d
Wind (Höhe 32m): 28.2 km/h
Wind (Max.): 52.4 km/h

...mehr