Nicotiana sect. Petunioides
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| G.Don |
Nicotiana sect. Petunioides is a section of the genus tobacco ( Nicotiana ). Eight species are counted to it.
description
The species in the Petunioides section are annual , herbaceous plants that can easily become woody at the base. The leaves are stalked or in the upper part of the plant also winged-stalked and sticky hairy.
The inflorescences are sham panicles , loose grapes or spherical clusters. The flowers open in the evening but hardly wilt during the day. The crown is radially symmetrical or only slightly zygomorphic , salver-shaped and white in color, the outside of the corolla tube is greenish or somewhat purple. The corolla lobes are pointed. The stamens are unequal in length within a flower, but set at the same height near or below the center of the tubular part of the crown.
The number of chromosomes is n = 12.
distribution
The species are distributed from the southwestern United States to South America .
Systematics
The following species are included in the Petunioides section :
- Nicotiana acuminata (Graham) Hook.
- Nicotiana attenuata Torrey ex S. Watson
- Nicotiana corymbosa J. Rémy
- Nicotiana linearis Phil
- Nicotiana longibracteata Phil.
- Nicotiana miersii J. Rémy
- Nicotiana pauciflora J. Rémy
- Nicotiana spegazzinii Millán
Botanical history
The section Petunioides was first set up in 1838 by George Don junior as one of four sections of the genus Nicotiana . It included all species with white salver-shaped flowers. Of the species counted today in the section, he only lists Nicotiana acuminata , further representatives of the sections Suaveolentes ( Nicotiana suaveolens ), Alatae ( Nicotiana longiflora , Nicotiana plumbaginifolia and Nicotiana bonariensis ), Noctiflorae ( Nicotiana noctiflora ) and Nicotiana sect. Repandae ( Nicotiana repanda ). Furthermore, species are listed by him, which today are either synonyms of other accepted species names, or whose species concept is insufficiently known. These are Nicotiana vincaeflora , Nicotiana persica , Nicotiana angustifolia , Nicotiana dilatata and Nicotiana viscosa .
After Michel Félix Dunal divided the genus into only two sections in 1852 and assigned a total of 23 species to a group of Petunioides without rank within its Didicli section , Richard Wettstein resumed the classification of Don in 1895, but classified the species in the Polydiclia section after Don the Petunioides section . The current scope of the section was first compiled by Thomas Harper Goodspeed , but he published the name Acuminatae for the section in 1945 and also used it in his 1954 monograph on the genus Nicotiana . Priority according to the International Code of Nomenclature for Algae, Fungi and Plants (ICBN), however, has the name Petunioides after George Don junior.
proof
- ↑ a b c d e f g Sandra Knapp, Mark W. Chase and James J. Clarkson: Nomenclatural changes and a new sectional classification in Nicotiana (Solanaceae) . In: Taxon , Volume 53, Number 1, February 2004. pp. 73-82.
- ↑ a b c T. H. Goodspeed, H.-M. Wheeler and PC Hutchinson: Section Acuminatae, Taxonomic Treatment In: Thomas Harper Goodspeed (Eds.): The Genus Nicotiana: Origins, Relationships and Evolution of its Species in the Light of their Distribution, Morphology and Cytogenics , 1954. Reprinted by AJ Reprints Agency , New Delhi, India, 1982. pp. 421-425.
- ^ George Don junior: Nicotiana . In: A General History Of the Dichlamydeos Plants , Volume 4, JG and F. Rivington, London, 1838. pp. 462-467. doi : 10.5962 / bhl.title.21964
- ↑ Michél Felix Dunal: XLVIII: Nicotiana . In: AP de Candolle (ed.): Prodromus Systematis Naturalis Regni Vegetabilis , Volume 13, Part 1: Michél Felix Dunal: Solanaceae , Victor Masson, Paris, 1852. pp. 556-572. doi : 10.5962 / bhl.title.286
- ^ Richard von Wettstein: Solanaceae . In: A. Engler and K. Prantl (eds.): The natural plant families , part 4, department 3b, Wilhelm Engelmann, Leipzig, 1895.