| Allenrolfea | |
|---|---|
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| Allenrolfea occidentalis | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Amaranthaceae |
| Subfamily: | Salicornioideae |
| Genus: | Allenrolfea Kuntze |
| Species | |
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Allenrolfea is a genus of shrubs in the family Amaranthaceae. The genus was named for the English botanist Robert Allen Rolfe. There are three species, ranging from North America to South America. [1]
The species of Allenrolfea are subshrubs or shrubs with erect or decumbent growth. The stems are much branched, succulent, glabrous and appear to be articulated. The alternate leaves are sessile and stem-clasping, fleshy, glabrous, their blades reduced to small, broadly triangular scales, with entire margins and acute apex. [1]
The inflorescences are terminal spikes with spirally arranged flowers. Cymes of three or five flowers are sitting in the axils of deciduous, peltate, fleshy bracts. The flowers are bisexual. The perianth consists of 4-5 joined tepals, their lobes angled and truncate distally. There are 1-2 stamens exserting the flower and an ovary with 2(-3) stigmas. [1]
The fruit in an ovoid, compressed utricle with membranous pericarp. The erect seed is brown or reddish brown, oblong, with smooth surface. It contains copious perisperm (feeding tissue), [1] and a half-annular embryo. [2]
The chromosome basic number is x = 9. [1]
The species of Allenrolfea are distributed in North America (southwestern United States), [1] Mexico, Central America, and South America (Argentina). [2] [3] [4] They grow on alkaline soils, on sandy hummocks in salt playas, and in mud flats. In the USA they are found at about 1000–1700 m above sea level. [1]
The first publication of the genus Allenrolfea was made in 1891 by Otto Kuntze. [5] With this description, he replaced the invalid name SpirostachysS.Watson from 1874, (which is illegitimate, as Spirostachys Sond. already existed since 1850). The type species is Allenrolfea occidentalis. [6]
The genus consists of three species: [1] [2] [7]
Allenrolfea is a near relative of the genus Heterostachys , which also is distributed in America. Their common lineage seems to have evolved early in the evolution of the subfamily Salicornioideae, dating back to the Early to Middle Oligocene. It might have reached America long before the other American taxa of Salicornioideae. [2]
Spirostachys is a plant genus of the family Euphorbiaceae first described as a genus in 1850. It is native to Africa. Zuloaga, F. O., O. Morrone, M. J. Belgrano, C. Marticorena & E. Marchesi. (eds.) 2008. Catálogo de las plantas vasculares del Cono Sur. Monographs in systematic botany from the Missouri Botanical Garden 107(1–3): i–xcvi, 1–3348.
Philesia is a South American genus of flowering plants in the family Philesiaceae first described as a genus in 1789.
Galium divaricatum is a species of flowering plant in the coffee family known by the common name Lamarck's bedstraw.
Bahia ambrosioides is a South American species of flowering plants in the family Asteraceae. It is native to Chile including the Juan Fernández Islands.
Oplismenopsis is a genus of South American plants in the grass family. The only known species is Oplismenopsis najada, native to southern Brazil, Uruguay, and northeastern Argentina.
Neobouteloua is a genus of Argentine and Chilean plants in the grass family.
Eriachaenium is a genus of South American flowering plants in the family Asteraceae.
Dolichlasium is a genus of flowering plants in the family Asteraceae.
Duseniella is a genus of Argentine flowering plants in the family Asteraceae.
Gamochaetopsis is a genus of flowering plants in the daisy family.
Gypothamnium is a genus of South American flowering plants in the family Asteraceae.
Huarpea is a genus of flowering plants in the family Asteraceae.
Paleaepappus is a genus of flowering plants in the aster tribe within the sunflower family.
Hippeastrum aulicum, the Lily of the Palace, is a bulbous perennial, in the family Amaryllidaceae, native to the Atlantic Forest and Cerrado ecoregions from Brazil to Paraguay, in South America.
Hippeastrum cybister is a flowering perennial herbaceous bulbous plant, in the family Amaryllidaceae, native from Bolivia to Argentina.
Heterostachys is a genus of flowering plants in the plant family Amaranthaceae. The two species are shrubby halophytes native to South America and Central America.
Guynesomia is a genus of Chilean flowering plants in the tribe Astereae within the family Asteraceae.
Ribes magellanicum is a South American species of shrubs in the currant family, found in Patagonia.
Rubus geoides is a South American species of flowering plant in the rose family. It has been found only in the extreme southern part of the continent, in the Provinces of Tierra del Fuego, Santa Cruz, Río Negro, and Neuquén in Argentina, the adjacent Magallanes Region of Chile, and the Falkland Islands.
Philodendron appendiculatum, also known as güembé, is a perennial species in the genus Philodendron, belonging to the family Araceae. It lives in the jungles, wetlands, and moist forests of South America.
Media related to Allenrolfea at Wikimedia Commons
Data related to Allenrolfea at Wikispecies| Authority control databases: National |
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