The De Candolle system is a system of plant taxonomy by French (Swiss) botanist Augustin Pyramus de Candolle (1778−1841).
The first taxonomic system by de Candolle, who introduced the term taxonomy, appeared in his description of the plants of France, his Flore française (1805–1815), in 5 volumes dealing with plant species found in France.
The De Candolle system is a subsequent taxonomic system.
The abbreviation Syst. in de Candolle's work and subsequent literature refers to his Regni vegetabilis systema naturale.
The De Candolle system recognises the following groups of vascular plants (references to Prodromus). Within the Prodromus he cross references his earlier Regni vegetabilis systema naturale.
A general schema is laid out in the Regnii vegetabilis pp. 117–122, as follows:
Plantae Vasculares seu Cotyledoneae DC.
Vol IV - 2 parts Vol V
List of De Candolle system families recognized in the Théorie élémentaire de la botanique (1813), on page 213:
The De Candolle system families were further developed in the Prodromus (1824–1873).
Note that this system was published well before there were internationally accepted rules for botanical nomenclature. Here, a family is indicated as "ordo". Terminations for families were not what they are now. Neither of these phenomena is a problem from a nomenclatural perspective, the present day ICBN provides for this.
Within the dicotyledons ("classis prima DICOTYLEDONEÆ") the De Candolle system recognises (Pagination from Prodromus, 17 Parts) the list:
(Index to Part I p. 741)
Somewhat inconsistently the Prodromus also treats:
(Overall Index Part XVII Page 323)
Augustin Pyramusde Candolle was a Swiss botanist. René Louiche Desfontaines launched de Candolle's botanical career by recommending him at an herbarium. Within a couple of years de Candolle had established a new genus, and he went on to document hundreds of plant families and create a new natural plant classification system. Although de Candolle's main focus was botany, he also contributed to related fields such as phytogeography, agronomy, paleontology, medical botany, and economic botany.
Prodromus Systematis Naturalis Regni Vegetabilis (1824–1873), also known by its standard botanical abbreviation Prodr. (DC.), is a 17-volume treatise on botany initiated by Augustin Pyramus de Candolle. De Candolle intended it as a summary of all known seed plants, encompassing taxonomy, ecology, evolution and biogeography. He authored seven volumes between 1824 and 1839, but died in 1841. His son, Alphonse de Candolle, then took up the work, editing a further ten volumes, with contributions from a range of authors. Volume 17 was published in October 1873. The fourth and final part of the index came out in 1874. The Prodromus remained incomplete, dealing only with dicotyledons.
Alfred Wesmael was a Belgian professor of botany. His outstanding work in taxonomy saw him invited to become Visiting Professor at the University of Washington.
Aphanostephus (dozedaisy) is a genus of flowering plants in the daisy family, Asteraceae.
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Duhaldea is a genus of Asian flowering plants in the daisy family.
Microglossa is a genus of Asian and African flowering plants in aster tribe within the sunflower family.
Syncephalum is a genus of flowering plants in the pussy's-toes tribe within the daisy family.
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Arctogeron is a genus of flowering plants in the daisy family.
Calyciflorae is a grouping of plants that is no longer used by botanists. Augustin Pyramus de Candolle defined it as a subclass within the class Dicotyledoneae. It overlapped largely with the modern Rosids group. The group Calyciflorae was defined as:
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Jacques Denys (Denis) Choisy was a Swiss Protestant clergyman and botanist.
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Olearia decurrens, commonly known as the clammy daisy bush, is a shrub or subshrub species in the family Asteraceae native to inland Australia.
Amyema gaudichaudii, commonly known as melaleuca mistletoe is a plant in the family Loranthaceae endemic to eastern Australia. Like other mistletoes, it is a shrubby, woody, aerial hemiparasite plant. It has relatively small, wedge-shaped leaves and small, dark red flowers arranged in groups of three. It only grows on a few species of Melaleuca.
Scaevola glandulifera, the viscid hand-flower, is a shrub in the family Goodeniaceae, endemic to Western Australia.
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Podolepis canescens is a herb in the Asteraceae family, which is found in South Australia, the Northern Territory, New South Wales and Victoria. PlantNet also states that it is found in Western Australia, but FloraBase states that the name is misapplied in Western Australia, based on Jeanes (2015).