Hymenostephium

Last updated

Hymenostephium
Hymenostephium tenue.jpg
Hymenostephium tenue
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Subtribe: Helianthinae
Genus: Hymenostephium
Benth. in Benth. & Hook.f.
Type species
Hymenostephium mexicanum
Synonyms [2]
  • GarcilassaPoepp. & Endl.in E.F.Poeppig & S.L.Endlicher, Nov. Gen. Sp. Pl. 3: 45 (1843)
  • HaplocalymmaS.F.Blake in Proc. Amer. Acad. Arts 51: 517 (1916)
  • MicrocephalumSch.Bip. ex Klatt in Leopoldina 23: 90 (1887), not validly publ.
  • Viguiera sect. DiplostichisS.F.Blake [3]

Hymenostephium is a genus of flowering plants in the family Asteraceae. It includes herbs and slender shrubs that occur from Mexico through to Venezuela and north-western Argentina.

Contents

Description

Hymenostephium is characterized by the relatively slender habit of the plants, 1–2 seriate involucres, and relatively small heads of flowers. There is variation in the pappus which, in part, has led to some members having been placed formerly in the now empty genus Haplocalymma, or in separate genera now considered as synonymous with Hymenostephium.

Molecular phylogenetic data place the genus as sister to Sclerocarpus and in a relatively basal position in the subtribe Helianthinae, [4] [5] the group that includes the common sunflower (Helianthus annuus). [6]

Species

Includes 22 accepted species; [2]

Distribution

They are native to the countries of north western Argentina, Bolivia, Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panamá, Peru and Venezuela. [2]

Related Research Articles

<span class="mw-page-title-main">Heliantheae</span> Tribe of sunflower plants

The Heliantheae are the third-largest tribe in the sunflower family (Asteraceae). With some 190 genera and nearly 2500 recognized species, only the tribes Senecioneae and Astereae are larger. The name is derived from the genus Helianthus, which is Greek for sun flower. Most genera and species are found in North America and South America. A few genera are pantropical.

Aldama media is a species of flowering plant in the family Asteraceae. It is found only in Ecuador. Its natural habitat is near saline lakes, growing in dry forests, scrublands and grasslands. It is threatened by habitat loss.

<i>Viguiera</i> Genus of flowering plants

Viguiera is a genus of flowering plants in the family Asteraceae. It contains around 19–40 species, which are commonly known as goldeneyes and are native to the New World. These are herbs to bushy shrubs that bear yellow or orange daisy-like flowers.

<i>Heliomeris</i> Genus of plants

Heliomeris is a genus of flowering plants in the family Asteraceae, known generally as false goldeneyes.

<i>Aldama</i> (plant) Genus of flowering plants

Aldama is a genus of flowering plants in the family Asteraceae. The native range of this genus is tropical & sub-tropical America. The genus was originally described to include one species of subtribe Helianthinae that were characterized by having pales that tightly enclosed the cypselae (achenes).

Desmanthodium is a genus of flowering plants in the family Asteraceae.

<i>Sclerocarpus</i> Genus of plants

Sclerocarpus is a genus of flowering plants in the tribe Heliantheae within the family Asteraceae. Bonebract is a common name for plants in this genus.

<i>Simsia</i> Genus of plants

Simsia is a genus of flowering plants in the tribe Heliantheae within the family Asteraceae. It includes annuals, herbaceous perennials, and shrubs. They range from the western United States south through Central and South America to Argentina, with the center of diversity occurring in Mexico. The genus is named for British physician and botanist John Sims (1749–1831). Although some species are relatively rare, others have become common weeds that line the roadsides and fields of Mexico, often forming dense stands mixed with Tithonia and other Asteraceae. Some species are known by the common name bushsunflower.

<i>Iostephane</i> Genus of flowering plants

Iostephane is a genus of Mexican flowering plants in the family Asteraceae. They were first published in G.Bentham & J.D.Hooker, Genera Plantarum Vol.2 on page 368 in 1873.

<i>Lagascea</i> Genus of flowering plants

Lagascea is a genus of flowering plants in the family Asteraceae. It occurs primarily in Mexico, but some species extend into Central America and one reaches north into the western United States. One species, L. mollis, has been widely introduced to other localities around the tropics and subtropics.

Otopappus is a genus of flowering plants in the tribe Heliantheae within the family Asteraceae, primarily Mesoamerican but with one species from Jamaica.

Rhysolepis was a genus of Mexican plants in the tribe Heliantheae within the family Asteraceae. Until 2011, when botanists Schilling & Panero studied the subtribe Helianthinae based on molecular sequences of nuclear ITS, ETS, and cpDNA, coming to a conclusion that that the genus ViguieraKunth, did not constitute a monophyletic group. Among their conclusions they proposed to reclassify the genus, dividing and relocating its species in at least eleven genera: AldamaLa Llave, BahiopsisKellogg, Calanticaria(B.L. Rob. & Greenm.) E.E. Schill. & Panero, DavilanthusE.E. Schill. & Panero, DendroviguieraE.E. Schill. & Panero, GonzaleziaE.E. Schill. & Panero, HeiseriaE.E. Schill. & Panero, HeliomerisNutt., HymenostephiumBenth., SidneyaE.E. Schill. & Panero and ViguieraKunth.

<i>Perymenium</i> Genus of flowering plants

Perymenium is a genus of South American and Mesoamerican plants in the tribe Heliantheae within the family Asteraceae.

<i>Echeandia</i> Genus of flowering plants

Echeandia is a genus of New World plants in the century plant subfamily within the asparagus family.

<i>Bahiopsis</i> Genus of flowering plants

Bahiopsis is a genus of North American flowering plants in the tribe Heliantheae within the family Asteraceae. It is native to the southwestern United States and northwestern Mexico, with several of the species endemic to the Baja California Peninsula.

Calanticaria is a genus of flowering plants belonging to the family Asteraceae.

Davilanthus is a genus of flowering plants belonging to the family Asteraceae.

Gonzalezia is a genus of flowering plants belonging to the family Asteraceae.

Heiseria is a genus of flowering plants belonging to the family Asteraceae.

Dendroviguiera is a genus of flowering plants in the sunflower family. Its native range stretches from Mexico into Central America. Formerly part of the Viguiera genus, until a DNA study in 2011 separated out all the shrub/tree species of the Viguiera genus.

References

  1. Bentham, George in Bentham, George & Hooker, Joseph Dalton. 1873. Genera plantarum :ad exemplaria imprimis in Herberiis Kewensibus servata definita 2: 382 in Latin
  2. 1 2 3 "Hymenostephium Benth. | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 2 November 2023.
  3. Tropicos, Hymenostephium Benth.
  4. Schilling, E.E.; Panero, J.L. (2002). "A revised classification of subtribe Helianthinae (Asteraceae: Heliantheae) I. Basal lineages". Botanical Journal of the Linnean Society. 140: 65–76. doi: 10.1046/j.1095-8339.2002.00079.x .
  5. Schilling, Edward E.; Panero, Jose L. (November 2011). "A revised classification of subtribe Helianthinae (Asteraceae: Heliantheae) II. Derived lineages". Botanical Journal of the Linnean Society. 167 (3): 311–331. doi: 10.1111/j.1095-8339.2011.01172.x .
  6. Turner, Billie T. 2013. Recension of the Mexican species of Hymenostephium (Asteraceae:Helianthese). Phytologia 95:1-9