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Encyclopedia > Snapdragon
Antirrhinum

Snapdragon
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Lamiales
Family: Scrophulariaceae
Genus: Antirrhinum
Species

This list is currently incomplete

Section Antirrhinum
Antirrhinum australe
Antirrhinum barrelieri
Antirrhinum boissieri
Antirrhinum braun-blanquetii
Antirrhinum charidemi
Antirrhinum graniticum
Antirrhinum grosii
Antirrhinum hispanicum
Antirrhinum latifolium
Antirrhinum lopesianum
Antirrhinum majus
Antirrhinum meonanthum
Antirrhinum microphyllum
Antirrhinum molle
Antirrhinum onubensis
Antirrhinum pertegasii
Antirrhinum pulverulentum
Antirrhinum rupestre
Antirrhinum sempervirens
Antirrhinum siculum
Antirrhinum spurium
Antirrhinum valentinum
Section Orontium
Antirrhinum calycinum
Antirrhinum orontium
Section Saerorhinum
Antirrhinum breviflorum
Antirrhinum confertiflorum
Antirrhinum cornutum
Antirrhinum costatum
Antirrhinum coulterianum
Antirrhinum fernandezcasasii
Antirrhinum filipes
Antirrhinum kellogii
Antirrhinum kingii
Antirrhinum leptaleum
Antirrhinum multiflorum
Antirrhinum nuttalianum
Antirrhinum ovatum
Antirrhinum subcordatum
Antirrhinum vexillo-calyculatum
Antirrhinum virga
Antirrhinum watsonii


Antirrhinum is a genus of plants in the family Scrophulariaceae, more commonly known as snapdragons from the flowers' fancied resemblance to the face of a dragon.


The taxonomy of this genus is disputed at present. At one extreme, ITIS recognises only the Old World species of sect. Antirrhinum in the genus, listing only the Garden Snapdragon A. majus (the only species in the section naturalised in North America). At the other, Thompson (1988) treated 36 species in the genus; many modern botanists accept this circumscription. New species also continue to be discovered (see e.g. Romo et al., 1995).


Recent research in the molecular systematics of this group, and related species, by Oyama and Baum (2004), has confirmed that the genus as described by Thompson is monophyletic, provided that one species (A. cyathiferum) is removed to a separate genus, and two others (previously listed as Mohavea confertiflora and M. breviflora) are included. The species list at the right follows these conclusions. It is widely agreed that this broad group should be subdivided into three or four subgroups, but the level at which this should be done, and exactly which species should be grouped together, remain unclear. Some authors continue to follow Thompson in using a large genus Antirrhinum, which is then divided into several sections; others treat Thompson's genus as a tribe or subtribe, and divide it into several genera.


If the broad circumscription is accepted, its sections are as follows:

  • Section Antirrhinum: about 20 Old World species of perennial plants, the type Antirrhinum majus, mostly native to the western Mediterranean region with a focus on the Iberian Peninsula.
  • Section Orontium: two to six species, also Mediterranean. The species in this section, including the type Lesser Snapdragon A. orontium, are often treated in the genus Misopates.
  • Section Saerorhinum: about 16 New World species, mostly annual plants and mostly native to California, though species are found from Oregon to Baja California Sur and as far east as Utah. Like other authors, Thompson placed A. cyathiferum in this section, but Oyama and Baum, following earlier authors, suggest that it should be reclassified in genus Pseudorontium, while Mohavea confertiflora and M. breviflora should be included. Some authors classify the species in this section into the genera Sairocarpus, Howelliella and Neogaerrhinum.
Enlarge
Snapdragon (Antirrhinum majus)

The Garden Snapdragon is an important garden plant; cultivars of this species have showy white, crimson, or yellow bilabiate flowers. It is also important as a model organism in botanical research, and its genome has been studied in detail.


While Antirrhinum majus is the plant that is usually meant if the word "snapdragon" is used on its own, many other species in the genus, and in the family Scrophulariaceae more widely, have common names that include the word "snapdragon".


External links

  • Snapdragon Home Page (http://caliban.mpiz-koeln.mpg.de/~stueber/snapdragon/snapdragon.html)

References

  • Oyama, R. K., & Baum, D. A. (2004). Phylogenetic relationships of North American Antirrhinum (Veronicaceae). American Journal of Botany 91: 918-925.
  • Romo, A., Stubing, G., & Peris, J. B. (1995). A new species of Antirrhinum (Scrophulariaceae) from North Morocco. Annales Botanici Fennici 32: 165-168.
  • Thompson, D. M. (1988). Systematics of Antirrhinum (Scrophulariaceae) in the New World. Systematic Botany Monographs 22.
Enlarge
A white cultivar of Common Snapdragon Antirrhinum majus

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