Pseudognaphalium obtusifolium

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Pseudognaphalium obtusifolium
Pseudognaphalium obtusifolium Gil.jpg
Photo taken by Gil Nelson
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta – Flowering plants
Class: Magnoliopsida – Dicotyledons
Order: Asterales
Family: Asteraceae ⁄ Compositae
Genus: Pseudognaphalium
Species: P. obtusifolium
Binomial name
Pseudognaphalium obtusifolium
(L.) Hilliard & B.L. Burtt
PSEU OBTU dist.jpg
Natural range of Pseudognaphalium obtusifolium from USDA NRCS Plants Database.

Common names: Rabbit tobacco or Sweet everlasting (Nelson 2005).

Taxonomic notes

Synonyms: Gnaphalium obtusifolium Linnaeus; Gnaphalium obtusifolium Linnaeus var. praecox Fernald; Gnaphalium obtusifolium var. obtusifolium; Pseudognaphalium obtusifolium ssp. obtusifolium – K2; > Pseudognaphalium obtusifolium ssp. praecox (Fernald) Kartesz – K2; ? Gnaphalium polycephalum Michaux

Description

A description of Pseudognaphalium obtusifolium is provided in The Flora of North America.

Distribution

It is found in medium-sized gaps in a study investigating the interacting effects of overstory removal and ungulate herbivory in a hemlock hardwood forest in Alberta, Michigan. [1]

Ecology

Habitat

In the Coastal Plain in Florida and Georgia, P. obtusifolium can be found in mesic hardwoods, turkey oak scrubs, longleaf pine/scrub oak stands, pine flatwoods, bordering cattail marshes, sand ridges, cypress pond margins, annually burned pine savannas, and annually burned mature longleaf pine-wiregrass communities. [2] [3] It can also be found in roadside ditches, and open fields. Soil types include loamy sand, peat soils, sandy loam, and clay soil. [2] Associated species include slash pine, loblolly bay, longleaf pine, wiregrass, Liatris, Panicum, Leptoloma cognata, Polygonella, and Amphicarpum. [2] It has been observed that five to eight years after thinning a longleaf pine stand there was an increase in the frequency of P. obtusifolium. [4]

Phenology

P. obtusifolium has been observed to flower in March and August through October.[2][5]

Seed dispersal

This species is thought to be dispersed by wind. [6]

Pollination

The following Hymenoptera families and species were observed visiting flowers of Pseudognaphalium obtusifolium at Archbold Biological Station. [7]

Sphecidae: Cerceris blakei

Conservation and management

Cultivation and restoration

Photo Gallery

References and notes

  1. Holmes, S. A. and C. R. Webster 2011. Herbivore-induced expansion of generalist species as a driver of homogenization in post-disturbance plant communities. Plant Ecology 212: 753-768.
  2. 2.0 2.1 2.2 2.3 Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: July 2015. Collectors: Loran C. Anderson, David Hall, Gary Schultz, Cecil R Slaughter, A. F. Clewell, R.K. Godfrey, R. E. Perdue, Jr., Rev. Robert Brinker, James P. Gillespie, C. Jackson, Paul L. Redfearn, Jr., Richard S. Mitchell, Gary R. Knight, H. E. Grelen, H. Larry Stripling, D. B. Ward, E. S. Ford, R. Komarek, William D. Reese, Dianne Hall, MacClendons, G. Wilder. States and Counties: Florida: Bay, Calhoun, Citrus, Clay, Dixie, Escambia, Franklin, Gadsden, Gulf, Hamilton, Jackson, Lafayette, Leon, Liberty, Nassau, Putnam, Volusia, Wakulla. Georgia: Grady, Thomas. Compiled by Tall Timbers Research Station and Land Conservancy.
  3. Nelson, Gil. East Gulf Coastal Plain Wildflowers. A Field Guide to the Wildflowers of the East Gulf Coastal Plain, including Southwest Georgia, Northwest Florida, Southern Alabama, Southern Mississippi, and Parts of Southeastern Louisiana. Guilford, CT: Falcon, 2005. 115. Print.
  4. 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.
  5. 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: 13 DEC 2016
  6. 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.
  7. Deyrup, M.A. and N.D. 2015. Database of observations of Hymenoptera visitations to flowers of plants on Archbold Biological Station, Florida, USA.