Stylisma humistrata

Stylisma humistrata
Photo was taken by Gil Nelson
Scientific classification
Kingdom:	Plantae
Division:	Magnoliophyta – Flowering plants
Class:	Magnoliopsida – Dicotyledons
Order:	Solanales
Family:	Convolvulaceae
Genus:	Stylisma
Species:	S. humistrata
Binomial name
Stylisma humistrata (Walter) Chapm.
Natural range of Stylisma humistrata from USDA NRCS Plants Database.

Common name: southern dawnflower

Distribution

It is found in the Coastal Plains of southwestern Georgia (Baker County) (Kirkman et al 2004).

Ecology

Habitat

Stylisma humistrata can be found in longleaf pine-oak woodlands, longleaf pine-wiregrass-scrub oak ridges, annually burned pinelands, mesic woodlands, floodplains, hardwood hammocks (FSU Herbarium), and subxeric and xeric areas in longleaf pine-oak communities (Carter et al. 2004). It can also be found along roadsides, edges of cornfields, recently logged oak-pine slopes, and old fields (FSU Herbarium). Soil types include loamy sand, loam, and red sandy clay (FSU Herbarium). Associated species include Spigelia gentianoides and Quercus incana (FSU Herbarium).

Phenology

Flowers and fruits May through October (FSU Herbarium).

Seed bank and germination

S. humistrata exhibits physical seed dormancy and does not require light for germination (Jayasuriya 2008).

References and notes

• Carter, R. E., M. D. MacKenzie, D. H. Gjerstad and D. Jones. 2004. Species composition of fire disturbed ecological land units in the Southern Loam Hills of south Alabama. Southeastern Naturalist 3:297-308.

• Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: July 2015. Collectors: Loran C. Anderson, R. A. Norris, Robert K. Godfrey, R. Komarek, J. M. Kane, Jean Wooten, R. R. Smith, T. Myint, C. Jackson, Gary R. Knight, Robert Kral, Mabel Kral, S. B. Jones, Carleen Jones, Gwynn W. Ramsey, H. L. Stripling, T.E. Smith, R. D. Whetstone, James G. Teer, John W. Thieret, Sidney McDaniel, C. Ritchie Bell, Roomie Wilson, L. H. Shinners, R. L. Wilbur, Delzie Demaree, Harry E. Ahles, J. A. Duke, Lisa Keppner, Ed Keppner. States and Counties: Alabama: Clarke, Escambia, Geneva, Houston, Sumter. Arkansas: Bradley. Florida: Bay, Calhoun, Gadsden, Jackson, Lafayette, Leon, Liberty, Madison, Okaloosa, Washington. Georgia: Baker, Early, Grady, Lowndes, Thomas. Louisiana: Bienville, Tangipahoa, Union, Washington. Mississippi: Forrest, Jones, Wayne, Winston. North Carolina: Bladen, New Hanover, Narthampton, Pamlico. Texas: Woods. Compiled by Tall Timbers Research Station and Land Conservancy.

• Jayasuriya, K.M.G. Gehan, Jerry M. Baskin and Carol C. Baskin (2008). Dormancy, germination requirements and storage behaviour of seeds of Convolvulaceae (Solanales) and evolutionary considerations. Seed Science Research 18: 223-237

• Kirkman, L. K., K. L. Coffey, R. J. Mitchell and E. B. Moser. 2004. Ground cover recovery patterns and life-history traits: implications for restoration obstacles and opportunities in a species-rich savanna. Journal of Ecology 92:409-421.