Revision of Pectis Section Pectidium (compositae: Tageteae)
نویسندگان
چکیده
gramineis foliis capitulis parvis." Linnaeus (1759) published alter nate names for Sloane's plant under both Peetis and Verbesina. The history of sect. longc Pectidium is closely intertwined with a standing misapplication of the name Pectis linifolia. Only a year after Linnaeus described P. linifolia, {f . Jacquin (1760) published Pectis punctata. P. now to be tax- e ll Although punctata is known onomically synonymous with P. linifolia, this situation was not recognized by early botanists. The name Pectis punctata e ll soon gained wide acceptance while P. linifolia slipped into obscurity and disuse. Pectidium, In 1831 Lessing described the genus . based upon punctata. Pectis P. In the same publication, he misapplied e linifolia to a plant now correctly known as P. leptocephala (Cass.) Urban. Lessing's misapplication of P. linifolia was widely fol lowed, and most 19th century literature mentioning P. linifolia actually pertains to P. leptocephala. Pectidium Gray (1852) reduced i iwl1 from generic to sectional status. In 1853, Gray described Peetis imberbis. and in 1883 he included this species, punctata, to c , P. . and two species previously assigned sect. Heteropectis, P. multiseta Benth. and P. coulteri Harv. & Gray, in a broadened concept of sect. Pectidium. (1897) Fernald \ removed P. coulteri and P. multiseta from sect. Pectidium and raised the section to subgeneric status. corFernald also finally rected the misapplication of P. linifolia and properly relegated P.
منابع مشابه
Nematicidal and larvicidal activities of the essential oils from aerial parts of Pectis oligocephala and Pectis
The chemical composition of the essential oils from aerial parts of Pectis apodocephala and Pectis oligocephala were analyzed by GC-MS. The essential oils of these species were predominantly constituted by monoterpenes. Geranial (42.9– 44.5%), neral (32.2– 34.2%) and α-pinene (10.7– 11.4%) were the main constituents in the oil of P. apodocephala, while p-cymene (50.3– 70.9%) and thymol (24.4– 4...
متن کاملNematicidal and larvicidal activities of the essential oils from aerial parts of Pectis oligocephala and Pectis apodocephala Baker.
The chemical composition of the essential oils from aerial parts of Pectis apodocephala and Pectis oligocephala were analyzed by GC-MS. The essential oils of these species were predominantly constituted by monoterpenes. Geranial (42.9-44.5%), neral (32.2-34.2%) and alpha-pinene (10.7-11.4%) were the main constituents in the oil of P. apodocephala, while p-cymene (50.3-70.9%) and thymol (24.4-44...
متن کاملA Revision of Alyssum L. Section Gamosepalum (Hausskn.) Dudley (Brassicaceae), in Iran
Section Gamosepalum has been reported from Turkey for the first time by Dudley. In recent years, several species of this section were reported as new records for Iran. Four species of Alyssum section are tranfered from sect. Alyssum to sect. Gamosepalum with considering of important characters in each section. These changes made two synonymies. Five species of Gamosepalum section including A. l...
متن کاملThe limitations of molecular markers in phylogenetic reconstruction: the case of Centaurea section Phrygia (Compositae)
متن کامل
REVISION ON TAXONOMY OF POLYGONUM SECTIONS IN IRAN BY PALYNOLOGICAL CHARACTERS
Species belonging to different sections of the genus Polygonum L. were studied micro-morphologically. For this purpose, digital images were obtained from all species and lower taxa belonging to sections Persicaria, Bistorta, Tiniaria and Pleuropterus. Since section Polygonum is much diverse, pollens of three representative species Polygonum luzuloides, P. olivascens and P. setosum were photogra...
متن کامل