Thryallis
Encyclopedia
Thryallis is a genus
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 in the Malpighiaceae
Malpighiaceae
Malpighiaceae is a family of flowering plants in the order Malpighiales. It comprises approximately 75 genera and 1300 species, all of which are native to the tropics and subtropics...

 comprising 5 species
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 of scandent shrubs and woody vines native to Brazil
Brazil
Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

 and adjacent Paraguay
Paraguay
Paraguay , officially the Republic of Paraguay , is a landlocked country in South America. It is bordered by Argentina to the south and southwest, Brazil to the east and northeast, and Bolivia to the northwest. Paraguay lies on both banks of the Paraguay River, which runs through the center of the...

 and Bolivia
Bolivia
Bolivia officially known as Plurinational State of Bolivia , is a landlocked country in central South America. It is the poorest country in South America...

.

At one time some species now assigned to Galphimia
Galphimia
Galphimia is a genus in the Malpighiaceae, a family of about 75 genera of flowering plants in the order Malpighiales; the name is an anagram of Malpighia. Galphimia comprises 26 species of large herbs, shrubs, and treelets. Twenty-two species occur in Mexico, one extending into Texas and one ...

, e.g., Galphimia gracilis
Galphimia gracilis
Galphimia gracilis, a species in the genus Galphimia of the family Malpighiaceae, is native to eastern Mexico. It is widely cultivated in warm regions throughout the world, often under the common names gold shower or shower-of-gold or sometimes thryallis...

, were referred to Thryallis, but the generic name Thryallis is now a conserved name
Conserved name
A conserved name or nomen conservandum is a scientific name that has specific nomenclatural protection. Nomen conservandum is a Latin term, meaning a "name which should be conserved"...

 according to the rules of the International Code of Botanical Nomenclature. The genus Thryallis is distinctive in the stellate hairs and scales found on the vegetative parts, and in that the limb of the petals is much wider than long, traits not found in Galphimia
Galphimia
Galphimia is a genus in the Malpighiaceae, a family of about 75 genera of flowering plants in the order Malpighiales; the name is an anagram of Malpighia. Galphimia comprises 26 species of large herbs, shrubs, and treelets. Twenty-two species occur in Mexico, one extending into Texas and one ...

.

External links and references



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