Agalinis divaricata

From Coastal Plain Plants Wiki
Jump to: navigation, search
Agalinis divaricata
Agalinis divaricata MMS Torreya SP Oct 2015.jpg
Photo by Michelle Smith at Torreya State Park
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Order: Lamiales
Family: Orobancheaceae
Genus: Agalinis
Species: A. divaricata
Binomial name
Agalinis divaricata
(Chapm.) Pennell
AGAL DIVA dist.jpg
Natural range of Agalinis divaricata from USDA NRCS Plants Database.

Common names: Pineland false foxglove; Little gerardia

Taxonomic notes

Synonym: Gerardia divaricata Chapm.

Description

It is an annual and flowers in the fall[1]. It flowers summer to fall.[2]

Distribution

It is infrequent in central, north, and west Florida. Found from: West to Mississippi, east to Alabama[1]. Listed as critically imperiled in Alabama and Georgia.[3] On the Florida panhandle and northern peninsula, observations have been made from Santa Rosa county[4][5], eastward to Leon and Wakulla, and in Levy, Alachua, Marion, Citrus, and Hernando counties.[4]

Ecology

Habitat

It occurs primarily in well drained sands and loamy sands of pine-oak sandhill communities, sand dunes and interdune hollows (Entisols), and pine flatwoods communities (Spodosols). It thrives in frequently burned areas.[6] It is found in dry, scrub pinelands.[1] It is found in dry pine-oak savannas, sandhills, and mesic bog margins[2]. Found in dry loamy sands, well drained sands, deep coarse sands, and loamy sand areas.[6] A. divaricata is also fund in human disturbed areas such as pine plantations, old fields, and along roadside edges and ditches. It does well in high levels of light.

Associated species: Myrica, Pinus, Quercus, Liatris, Pityopsis, Agalinis pulchella, Agalinis aphylla, Agalinis tenuifolia, Agalinis plukenetii, Quercus laevis, Aristida stricta, Andropogon spp.; Polygonella, Chrysopsis, Haplopappus, Opuntia, Eupatorium, Dicerandra, Trichostema, Liatris gracilis, and others.[6]

Phenology

Agalinis divaricata has been observed to flower between September to December with the peak of inflorescence in October.[7] In dry, longleaf pine forests and savannas of the Florida panhandle and northern peninsular Florida, A. divaricata flower from September through October.[4]

Fire ecology

It thrives in frequently burned areas; and occurs in areas with extremely xeric conditions (such as sand dunes) which limit competition with other vegetation.[6]

Use by animals

Agalinis species, including this one, host larvae of the common buckeye butterfly (Junonia coenia) in Florida.[4]

Conservation and management

A. divaricata requires fire or other vegetation-removing disturbance to maintain high light levels in the habitat which also reduces competition. It does not appear to be common in areas with a great deal of soil disturbance, although it occurs along roadsides and ditches.[6] This species is highly threatened by land-use conversion, habitat fragmentation and forest management practices.[3]

Cultivation and restoration

Photo Gallery

References and notes

  1. 1.0 1.1 1.2 Hall, David W. Illustrated Plants of Florida and the Coastal Plain: based on the collections of Leland and Lucy Baltzell. 1993. A Maupin House Book. Gainesville. 341. Print.
  2. 2.0 2.1 Wunderlin, Richard P. and Bruce F. Hansen. Guide to the Vascular Plants of Florida. Second edition. 2003. University Press of Florida: Gainesville/Tallahassee/Tampa/Boca Raton/Pensacola/Orlando/Miami/Jacksonville/Ft. Myers. 546. Print.
  3. 3.0 3.1 [[1]]NatureServe. Accessed: March 21, 2016
  4. 4.0 4.1 4.2 4.3 Observation by Roger Hammer in Silver Springs State Park, Marion County, FL. September 2016, posted to Florida Flora and Ecosystematics Facebook Group August 4, 2017.
  5. Observation by Kim Davis in Blackwater Forest and Garcon Point Nature Trail, Santa Rosa County, FL, September 19-28, 2003, posted to Florida Flora and Ecosystematics Facebook Group September 20126.
  6. 6.0 6.1 6.2 6.3 6.4 .Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: June 2014. Collectors: Sidney McDaniel, Andre F. Clewell, Robert K. Godfrey, Paul O. Schallert, J. M. Canne, John Morrill, Loran C. Anderson, J. Hays, Robert Kral, Jean W. Wooten, H. E. Grelen, John C. Semple, L. Brouillet, Wilson Baker, H. Roth, V Craig, Bill Boothe, Marcia Boothe, R. A. Norris, and T. MacClendon. States and Counties: Florida: Bay, Calhoun, Franklin, Gadsden, Gulf, Jackson, Leon, Liberty, Levy, Okaloosa, Santa Rosa, Wakulla, Walton, and Washington.
  7. Nelson, G. PanFlora: Plant data for the eastern United States with emphasis on the Southeastern Coastal Plains, Florida, and the Florida Panhandle. www.gilnelson.com/PanFlora/ Accessed: 6 DEC 2016