Difference between revisions of "Asclepias variegata"
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===Fire ecology===<!--Fire tolerance, fire dependence, adaptive fire responses--> | ===Fire ecology===<!--Fire tolerance, fire dependence, adaptive fire responses--> | ||
| − | ''Asclepias variegata'' has been found in burned pine-oak-hickory stands and pinelands, as well as annually burned savannas | + | ''Asclepias variegata'' has been found in burned pine-oak-hickory stands and pinelands, as well as annually burned savannas<ref name="fsu"/>. |
| − | + | ===Pollination=== | |
| + | Pollination of ''Asclepias'' is unusual. Pollen is contained in sacs (pollinia) located in the slits of the flower (stigmatic slits), when a pollinator walks across the flower head, these sacs attach to the pollinator and disperses on to another plant when the pollinator lands and walks<ref name="fnps"/>. There is no specialist insect pollinator<ref name="xerces">[[http://www.xerces.org/wp-content/uploads/2014/06/Milkweeds_XerSoc_june2014.pdf]]Xerces Society. Accessed: March 30, 2016</ref>. | ||
<!--===Use by animals===--><!--Herbivory, granivory, insect hosting, etc.--> | <!--===Use by animals===--><!--Herbivory, granivory, insect hosting, etc.--> | ||
<!--===Diseases and parasites===--> | <!--===Diseases and parasites===--> | ||
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==Conservation and Management== | ==Conservation and Management== | ||
==Cultivation and restoration== | ==Cultivation and restoration== | ||
Revision as of 13:55, 30 March 2016
| Asclepias variegata | |
|---|---|
| |
| photo by Gil Nelson | |
| Scientific classification | |
| Kingdom: | Plantae |
| Division: | Magnoliophyta - Flowering plants |
| Class: | Magnoliopsida - Dicotyledons |
| Order: | Gentianales |
| Family: | Asclepiadaceae |
| Genus: | Asclepias |
| Species: | A. variegata |
| Binomial name | |
| Asclepias variegata L. | |
| |
| Natural range of Asclepias variegata from USDA NRCS Plants Database. | |
Common names: Redring Milkweed, White Milkweed
Contents
Taxonomic notes
Synonyms: Biventraria variegata (Linnaeus) Small
Description
In general, with the Asclepias genus, they are perennial herbs usually milky sap. The stems are erect, spreading or decumbent and usually are simple and often solitary. The leaves are opposite to subopposite, are sometimes whorled, and rarely alternate. The corolla lobes are reflexed and are rarely erect or spreading. The filaments are elaborate into five hood forming a corona around the gynosteguim. The corona horns are present in most species[1].
More specifically, for A. variegata, the stems are simple, solitary, weakly pubescent or glabrate, and are approximately 2-10 dm tall. The leaves are opposite, have 2-5 pairs, the lower leaves are usually quite reduced in size, suborbicular to ovate or widely elliptic-lanceolate, and are 5-14 cm long, 3-7 cm wide. The leaves are firm, glabrous or very weakly pubescent, especially above. There are 1-4 umbels,that are terminal or from upper nodes, are globose, and are 3-6cm broad. The pedicels are 1-2 cm long. The corolla is bright white in color. The lobes are reflexed, are 6-7 mm long. The corona is 4-7 mm in diameter. The horns are shorter than the hoods. The follicles are 10-14 cm long, 1.5-2 cm broad. Flowers May to June; July to September[1].
Distribution
It is found from Connecticut west to Ohio, south to eastern Texas, and east to Florida[2].
Ecology
Habitat
Asclepias variegata is found in upland pine-oak forests and woodlands[2], and in mesic hammocks[3]. Additionally, it occurs on bluffs and slopes, burned pinelands, and annually burned savannas. It prefers higher light levels, growing mainly in sunny to semi-shaded environments, and is usually found in drying loamy sand or moist sandy loam. It also appears in disturbed habitat such as park trails and the borders of clear-cuts[4].
Associated species include pine, oak, hickory, magnolia, maple, sweet gum, juniper, Rubus brambles, Vaccinium, Chionanthus and others[4].
Phenology
This species flowers from May to July[2], but it has also been observed flowering in April. Fruiting has been observed in June, October, and November[4].
Fire ecology
Asclepias variegata has been found in burned pine-oak-hickory stands and pinelands, as well as annually burned savannas[4].
Pollination
Pollination of Asclepias is unusual. Pollen is contained in sacs (pollinia) located in the slits of the flower (stigmatic slits), when a pollinator walks across the flower head, these sacs attach to the pollinator and disperses on to another plant when the pollinator lands and walks[5]. There is no specialist insect pollinator[6].
Conservation and Management
Cultivation and restoration
Photo Gallery
References and notes
Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: June 2014. Collectors: Loran C. Anderson, Robert K. Godfrey, H. Kurz, K. Craddock Burks, James R. Burkhalter, L G Plank, Gary R. Knight, Andre F. Clewell, R. Kral, Richard S. Mitchell, Lisa Keppner, Ed Keppner, D.C. Hunt, R. Komarek, Wilson Baker, and R. F. Doren. States and Counties: Florida: Leon, Santa Rosa, Okaloosa, Jackson, Gadsden, Liberty, Jefferson, Wakulla, Walton, and Bay. Georgia: Grady and Thomas.
Radford, Albert E., Harry E. Ahles, and C. Ritchie Bell. Manual of the Vascular Flora of the Carolinas. 1964, 1968. The University of North Carolina Press. 848-852. Print.
Weakley, Alan S. Flora of the Southern and Mid-Atlantic States: Working Draft of 21 May 2015. University of North Carolina Herbarium (NCU). PDF. 933.
Wunderlin, Richard P. and Bruce F. Hansen. Guide to the Vascular Plants of Florida. Third edition. 2011. University Press of Florida: Gainesville/Tallahassee/Tampa/Boca Raton/Pensacola/Orlando/Miami/Jacksonville/Ft. Myers. 271. Print.
- ↑ 1.0 1.1 Radford, Albert E., Harry E. Ahles, and C. Ritchie Bell. Manual of the Vascular Flora of the Carolinas. 1964, 1968. The University of North Carolina Press. 848-852. Print.
- ↑ 2.0 2.1 2.2 Weakley, Alan S. Flora of the Southern and Mid-Atlantic States: Working Draft of 21 May 2015. University of North Carolina Herbarium (NCU). PDF. 933.
- ↑ Wunderlin, Richard P. and Bruce F. Hansen. Guide to the Vascular Plants of Florida. Third edition. 2011. University Press of Florida: Gainesville/Tallahassee/Tampa/Boca Raton/Pensacola/Orlando/Miami/Jacksonville/Ft. Myers. 271. Print.
- ↑ 4.0 4.1 4.2 4.3 Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: June 2014. Collectors: Loran C. Anderson, Robert K. Godfrey, H. Kurz, K. Craddock Burks, James R. Burkhalter, L G Plank, Gary R. Knight, Andre F. Clewell, R. Kral, Richard S. Mitchell, Lisa Keppner, Ed Keppner, D.C. Hunt, R. Komarek, Wilson Baker, and R. F. Doren. States and Counties: Florida: Leon, Santa Rosa, Okaloosa, Jackson, Gadsden, Liberty, Jefferson, Wakulla, Walton, and Bay. Georgia: Grady and Thomas.
- ↑ Cite error: Invalid
<ref>tag; no text was provided for refs namedfnps - ↑ [[1]]Xerces Society. Accessed: March 30, 2016
