Croptilon divaricatum

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Croptilon divaricatum
Croptilon divaricatum Gil.jpg
Photo was taken by Gil Nelson
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida – Dicotyledons
Order: Asterales
Family: Asteraceae ⁄ Compositae
Genus: Croptilon
Species: C. divaricatum
Binomial name
Croptilon divaricatum
(Nutt.) Raf.
CROP DIVA dist.jpg
Natural range of Croptilon divaricatum from USDA NRCS Plants Database.

Common name: Slender scratchdaisy

Taxonomic notes

Synonyms: Haplopappus divaricatus (Nuttall) A. Gray; Isopappus divaricatus (Nuttall) Torrey & Gray;

(Inula divaricata Nuttall The Flora of North America).

Description

A description of Croptilon divaricatum is provided in The Flora of North America.

Distribution

Occurs in the U.S. Gulf States in areas that have sandy soil where pocket gophers inhabit. This gives the area the characteristic disturbed appearance, bare ground and freshly turned patches of soil. [1] It is found occasionally in disturbed areas as defined in - Analysis of Longleaf Pine Sandhill Vegetation in Northwest Florida - in the bluestem-dominant plots.[2]

Ecology

Pine thinning resulted in significantly higher frequencies of C. divaricatum after 5 and 8 years.[3]

Habitat

It occurs in Sandhill Research and Education Center in South Carolina where soil series include Lakeland sands, loamy sands. Are mostly entisols (arenic and grosarenic quartzipsamments) with high permeability and low available water capacity. Previously was an agricultural area, so some of the land includes mosaic old-fields, pine stands, scrub oak dominated forests, and forested wetlands.[4] It is found in open areas near the edges of mixed pine-hardwood forests and wetlands, at boundaries between or near 2 or more natural communities in Alachua County, Florida.[5]

It is found in longleaf pine savanna communities.[3]

It is found in Longleaf pine-wiregrass savannas, turkey oak sand ridges, and edges of hardwood swamps and hillside bogs. It is also found in human disturbed areas, such as roadsides, fallow fields, and orange groves. Requires high light levels. It is associated in areas with sandy loam, clayey soil, and sandy soil types. [6] Associated species include Aster, Conyza, Lygodesmia, Liatris, Panicum, Leptoloma oognatum, and others. [6]

Phenology

It is a summer annual.[1] It has been observed fruiting in October and November. [6]

Seed dispersal

This species is thought to be dispersed by wind. [7]

Fire ecology

It is found in frequently burned areas, such as Longleaf pine savannas. [6]

Pollination

Use by animals

Bees were captured on Croptilon divaricatum.[5]

Conservation and management

Cultivation and restoration

Photo Gallery

References and notes

  1. 1.0 1.1 Shaal, B. A., Wesley J. Leverich (1982). "Survivorship Patterns in an Annual plant community." oecologia 54(2): 149-151.
  2. Rodgers, H. L., and Louis Provencher (1999). "Analysis of Longleaf Pine Sandhill Vegetation in Northwest Florida." castanea 64(2): 138-162.
  3. 3.0 3.1 Harrington, T. B. (2011). "Overstory and understory relationships in longleaf pine plantations 14 years after thinning and woody control." Canadian Journal of Forest Research 41: 2301-2314.
  4. Jenkins, R. A., and Patrick D. McMillan (2009). "Vascular Flora of Sandhill Research and Education Center, Richland County, South Carolina." Castanea 74(2): 168-180.
  5. 5.0 5.1 Hall, H. G. a. J. S. A. (2010). "Surveys of bees (Hymenoptera: Apoidea: Anthophila) in natural areas of Alachua County in north-central Florida." The Florida Entomologist 93(4): 609-629.
  6. 6.0 6.1 6.2 6.3 Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: June 2014. Collectors: Loran C. Anderson, Cecil R. Slaughter, Tara Baridi, Rex Ellis, L. Baltzell, Bruce Hansen, JoAnn Hansen, Paul L. Redfearn, Jr., C. Jackson, Robert K. Godfrey, John B. Nelson, Cortland S. Hill, A. H. Curtiss, Gary R. Knight, P. Genelle, G. Fleming, James D. Ray, Jr., Richard S. Mitchell, Andre F. Clewell, Cortland S. Hill, R. R. Smith, Gary H. Morton, Jeri Kirkland, D. B. Ward, R. Kral, Kathleen Craddock Burks, H. E. Grelen, R. A. Norris, and R. Komarek. States and Counties: Florida: Bay, Calhoun, Citrus, Clay, Dade, Dixie, Escambia, Gadsden, Hernando, Jackson, Jefferson, Lake, Leon, Liberty, Madison, Okaloosa, Putnam, Wakulla, and Walton. Georgia: Grady and Thomas.
  7. Kirkman, L. Katherine. Unpublished database of seed dispersal mode of plants found in Coastal Plain longleaf pine-grasslands of the Jones Ecological Research Center, Georgia.