Difference between revisions of "Diodia virginiana"
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===Phenology=== <!--Timing off flowering, fruiting, seed dispersal, and environmental triggers. Cite PanFlora website if appropriate: http://www.gilnelson.com/PanFlora/ --> | ===Phenology=== <!--Timing off flowering, fruiting, seed dispersal, and environmental triggers. Cite PanFlora website if appropriate: http://www.gilnelson.com/PanFlora/ --> | ||
Flowering and fruiting have been observed from May through November (FSU Herbarium). | Flowering and fruiting have been observed from May through November (FSU Herbarium). | ||
| + | ===Seed dispersal=== | ||
| + | According to Kay Kirkman, a plant ecologist, this species disperses by gravity. <ref name="KK"> Kay Kirkman, unpublished data, 2015. </ref> | ||
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===Fire ecology=== <!--Fire tolerance, fire dependence, adaptive fire responses--> | ===Fire ecology=== <!--Fire tolerance, fire dependence, adaptive fire responses--> | ||
It is favored by frequent fire,<ref>Glitzenstein, J. S., D. R. Streng, et al. (2003). "Fire frequency effects on longleaf pine (Pinus palustris, P.Miller) vegetation in South Carolina and northeast Florida, USA." Natural Areas Journal 23: 22-37.</ref> and grows in habitats maintained by fire (FSU Herbarium). | It is favored by frequent fire,<ref>Glitzenstein, J. S., D. R. Streng, et al. (2003). "Fire frequency effects on longleaf pine (Pinus palustris, P.Miller) vegetation in South Carolina and northeast Florida, USA." Natural Areas Journal 23: 22-37.</ref> and grows in habitats maintained by fire (FSU Herbarium). | ||
Revision as of 14:15, 12 April 2016
| Diodia virginiana | |
|---|---|
| |
| Photo taken by Gil | |
| Scientific classification | |
| Kingdom: | Plantae |
| Division: | Magnoliophyta - Flowering plants |
| Class: | Magnoliopsida – Dicotyledons |
| Order: | Rubiales |
| Family: | Rubiaceae |
| Genus: | Diodia |
| Species: | D. virginiana |
| Binomial name | |
| Diodia virginiana L. | |
| |
| Natural range of Diodia virginiana from USDA NRCS Plants Database. | |
Common name: Virginia buttonweed
Contents
Taxonomic notes
Synonyms: Diodia virginiana var. attenuata Fernald; D. virginiana var. latifolia Torrey & A. Gray; D. virginiana var. virginiana; D. tetragona Walter; D. hirsuta Pursh
Description
Diodia virginiana tends to grow in spreading mats, sometimes floating in shallow water (FSU Herbarium).
Generally, for Diodia genus, they are "annual or perennial herbs. Leaves sessile, opposite pubescent or glabrate, margins hyaline, setose-serrate; stipules linear or fimbriate, ½ as long, or longer than, the fruit. Flowers 4-merous, axillary, usually solitary, sessile; calyx lobes equal or unequal; corolla salverform. Fruit leathery, surmounted by the persistent calyx lobes, splitting into 2, indehiscent, 1-seeded segments." - Radford et al 1964.
Specifically, for D. virginiana species, they are "erect or spreading, usually pubescent perennial from a woody root crown, the stems branched, 1-6 dm or more long. Leaves elliptic-lanceolate to oblanecolate, mostly 2-7 cm long, 4-12 mm wide. Calyx lobes 2, linear-lanceolate, 2-4 mm long, pubescent; corolla white, tube filiform, 7-9 mm long, lobes 3-4 mm long, the inner surface pubescent; stigmas filiform or the style appearing cleft. Fruit pubescent, oblong-ellipsoid, 5-9 mm long, 3-5 mm in diam., prominently ridged. Fruit splitting into 2, indehiscent, 1-seeded segments." - Radford et al 1964.
Distribution
Ecology
Habitat
D. virginiana occurs in moist to wet areas, and areas subject to periodic inundation like ephemeral ponds (FSU Herbarium). It occurs in a wide range of light levels, from deep shade to full sun, but tends to prefer sandy soil types such as loamy sand, sand, sandy loam and sandy peat (FSU Herbarium). It can be found in natural communities including pine savannas, grassy areas near lakes and ponds, prairies, floodplain forests, sand bars, cypress-hardwood swamps, swampy woodlands, wetland areas, and calcareous hammocks (FSU Herbarium). However, it can also appear in disturbed habitat, like cutover pine woods, roadsides, old fields, and mowed areas (FSU Herbarium).
Associated species include Diodia teres, Aristida stricta, Polygonum, Sabatia dodecandra, Hypericum galioides, Eupatorium semiserratum (FSU Herbarium).
Phenology
Flowering and fruiting have been observed from May through November (FSU Herbarium).
Seed dispersal
According to Kay Kirkman, a plant ecologist, this species disperses by gravity. [1]
Fire ecology
It is favored by frequent fire,[2] and grows in habitats maintained by fire (FSU Herbarium).
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, R. K. Godfrey, R. Komarek, R. Kral, Sidney McDaniel, R. A. Norris, A.E. Radford, Cecil R. Slaughter, B. K. Holst, Valerie Renard, Lovette E. Williams, Rev. Robert Brinker, Robert L. Lazor, Grady W. Reinert, Suellen Folensbee, Paul L. Redfearn, Jr., S. W. Leonard, Gary R. Knight, Jame Amoroso, W. G. D'Arcy, Gywnn W. Ramsey, H. Larry Stripling, W. P. Adams, K. Craddock Burks, William Lindsey, D. W. Mather, Jean W. Wooten, Robert J. Lemaire, O. Lakela, Robert J. Lemaire, Leon Neel, R. F. Doren, A. Gholson Jr., K. Willis, R. Cherry, and Annie Schmidt. States and Counties: Florida: Alachua, Bay, Calhoun, Charlotte, Citrus, Collier, Columbia, Dade, Dixie, Duval, Escambia, Flagler, Franklin, Hamilton, Highland, Holmes, Indian River, Jackson, Jefferson, Lake, Leon, Levy, Liberty, Madison, Marion, Okaloosa, Orange, Osceola, Palm Beach, Polk, Osceola, Sarasota, Santa Rosa, St. Johns, Sumter, Taylor, Wakulla, Walton, and Washington. 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. 979. Print.
