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Heterotheca ( Anglèis )

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Heterotheca, (common names goldenasters, camphorweed, or telegraph weed)[5] are North American plants in the family Asteraceae.[1][6]

Etymology

Heterotheca comes from Ancient Greek ἕτερος héteros "other, different" and θήκη thḗkē "case, chest", and refers to the fact that, in some species in the genus, the cypselae (achenes containing seed) of the disk and ray florets have different shapes.[5][7]

Description, biology

These are annual and perennial herbs bearing daisy-like flower heads with yellow disc florets and usually yellow ray florets, associated with mesic to xeric habitats across North America. Several species now included in Heterotheca were previously classified in the genus Chrysopsis[3][5]

Heterotheca species are often used as food plants by the larvae of some Lepidoptera species including Schinia lynx, Schinia nubila and Schinia saturata (all of which have been recorded on Heterotheca subaxillaris).

Chemistry

The leaf volatiles from which the name "camphorweed" is derived include camphor, but as a minor constituent (less than 2%); of the 41 documented volatiles in a study of Heterotheca subaxillaris, for example, caryophyllene, pinene, borneol, myrcene, and limonene each comprised over 5% of the total.[8]

Species

Sources:[3][9]

Formerly included

Many species have been included in Heterotheca at various times in the past, but now regarded as more suitable for other genera. The most common of these is Chrysopsis, but others include Aster Bradburia Osbertia Munnozia Pityopsis + Tomentaurum.[3]

References

  1. ^ a b "Heterotheca". Tropicos. Missouri Botanical Garden.
  2. ^ "Heterotheca". The Plant List. Missouri Botanical Garden. Royal Botanic Gardens, Kew.{{cite web}}: CS1 maint: others (link) Note that this website has been superseded by World Flora Online
  3. ^ a b c d Flann, C (ed) 2009+ Global Compositae Checklist
  4. ^ The Plant List, search for Heterotheca
  5. ^ a b c Semple, John C. (2006). "Heterotheca". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 20. New York and Oxford. Retrieved 16 July 2016 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
  6. ^ Cassini, Alexandre Henri Gabriel de. 1817. Bulletin des Sciences, par la Societe Philomatique 1817: 137
  7. ^ a b C. Williamson, Gerald (2016). "US Wildflower - Camphorweed, Camphor Weed, False Goldenaster - Heterotheca subaxillaris". US Wildflowers. Retrieved 16 July 2016.
  8. ^ Lincoln, D.E.; Lawrence, B.M. (1984). "The volatile constituents of camphorweed, Heterotheca subaxillaris". Phytochemistry. 23 (4): 933–934. doi:10.1016/S0031-9422(00)85073-6.
  9. ^ "Heterotheca". County-level distribution maps from the North American Plant Atlas (NAPA). Biota of North America Program (BONAP). 2014.

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Heterotheca: Brief Summary ( Anglèis )

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Heterotheca, (common names goldenasters, camphorweed, or telegraph weed) are North American plants in the family Asteraceae.

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Heterotheca ( Spagneul; Castilian )

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Heterotheca, es un miembro de la familia Asteraceae. Comprende 77 especies descritas y solo 25 aceptadas.[1][2]

Descripción

Son hierbas anuales o perennes, generalmente con raíces primarias, a veces con rizomas, la base del vástago a veces algo leñosa. Tallos 1 a varios, erectos o ascendentes, con generalmente varios a numerosos ramas ascendentes por encima del punto medio, a veces sólo unos pocos-ramificados hacia la punta. Hojas basales a menudo marchitas o ausentes en el tiempo de floración, la hoja es estrecha a ampliamente oblanceolada, cónica en la base con un pecíolo alado, los márgenes enteros, ligeramente ondulados o dentados de diversas maneras. Hojas del tallo ligeramente a moderadamente reducido hacia la punta de la raíz, sésiles, estrechamente oblanceoladas a oblongo-lanceoladas, oblongo-ovadas, los márgenes enteros o dentados diversamente, las superficies y especialmente los márgenes de moderada a densamente pilosas, a veces también glandular. Inflorescencias de cabezuelas solitarias en las puntas de las ramas o de grupos pequeños, sueltos, a veces aparecen paniculadas. Involucro 4-10 mm de largo, en forma de copa o ligeramente en forma de campana. Brácteas involucrales en 3-6 series desiguales. Rayos florales 10-35 (ausente en otras partes), pistiladas, la corola de 4-15 mm de largo, de color amarillo. Disco floretes 15-65, perfecto, la corola 3-9 mm de largo, de color amarillo. Frutas 1.2-4.0 mm de largo.[3]

Taxonomía

El género fue descrito por Alexandre Henri Gabriel de Cassini y publicado en Bull. Sci. Soc. Philom. Paris 1817: 137. 1817.[3]​ La especie tipo es: Heterotheca lamarckii Cass.

Especies seleccionadas

A continuación se brinda un listado de las especies del género Heterotheca aceptadas hasta junio de 2011, ordenadas alfabéticamente. Para cada una se indica el nombre binomial seguido del autor, abreviado según las convenciones y usos.

Referencias

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Heterotheca: Brief Summary ( Spagneul; Castilian )

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Heterotheca, es un miembro de la familia Asteraceae. Comprende 77 especies descritas y solo 25 aceptadas.​​

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Heterotheca ( portughèis )

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Heterotheca é um género botânico pertencente à família Asteraceae[1].

  1. «Heterotheca — World Flora Online». www.worldfloraonline.org. Consultado em 19 de agosto de 2020
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Heterotheca: Brief Summary ( portughèis )

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Heterotheca é um género botânico pertencente à família Asteraceae.

«Heterotheca — World Flora Online». www.worldfloraonline.org. Consultado em 19 de agosto de 2020  title=
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Heterotheca ( vietnamèis )

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Heterotheca là một chi thực vật có hoa trong họ Cúc (Asteraceae).[1]

Loài

Chi Heterotheca gồm các loài:

Chú thích

  1. ^ The Plant List (2010). Heterotheca. Truy cập ngày 25 tháng 9 năm 2013.

Liên kết ngoài


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Heterotheca: Brief Summary ( vietnamèis )

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Heterotheca là một chi thực vật có hoa trong họ Cúc (Asteraceae).

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