Aristida lanosa
Common name: Woollysheath Three-awn
| Aristida lanosa | |
|---|---|
| |
| Photo by James H. Miller, USDA Forest Service, Bugwood.org | |
| Scientific classification | |
| Kingdom: | Plantae |
| Division: | Magnoliophyta - Flowering plants |
| Class: | Liliopsida – Monocotyledons |
| Order: | Poales |
| Family: | Poaceae ⁄ Gramineae |
| Genus: | Aristida |
| Species: | A. lanosa |
| Binomial name | |
| Aristida lanosa Muhl. ex Elliott | |
| |
| Natural range of Aristida lanosa from USDA NRCS Plants Database. | |
Contents
Taxonomic notes
Synonyms: none[1]
Varieties: Aristida lanosa var. lanosa; A. lanosa var. macera Fernald & [1]
Description
Tufted perennials. Culms are frequently geniculate, growing 0.7-1.2m tall. Nodes are glabrous or floccose; branches form lower nodes. Internodes are glabrous. Leaves are mostly low cauline; blades scaberulous beneath on margins and grow up to 40cm long and 0.5 mm wide. Sheath margins usually scarious and longer than internodes, floccose are lanose. Ligules are short ciliate and 0.1-0.2 mm long. Panicles or racemes are narrow. Panicles are brownish, 30-45cm long. Branches ascending and are scaberulous. Pedicels are unequal and scaberulous. Spikelets are 1-flowered and up to 10-18 mm long, and are frequently in 3’s. The spikelets are disarticulating above glumes. The pedicels are 1-6 mm long. Glumes are 1-nerved or first faintly 3-5 nerve and are scaberulous, margins are usually scarious, acuminate to short-awned, the first glume 10-18 mm long, the second is 9-12 mm long. Lemmas are faintly 3-nerved, spotted-papillose, margins scarious, and frequently enrolled in awns of 3. The lemma body is 8-9 mm long and the awns are ascending to divergent, they are twisted or straight basally, unequal, 5-30 mm long. Paleas are absent. The callus bearded and grow up to 1 mm long. The grain is linear, are yellowish in color, and grow up to 6.5 mm long. Plants are abundant in dry, sterile soils. Flowers from August to October.[2]
Distribution
The distribution of Aristida lanosa is from New Jersey, south to Florida, and west to Texas.[1] In Florida, its distribution is restricted to the north portion of the state.[3]
Ecology
Habitat
A. lanosa occurs in frequently burned upland longleaf pine-wiregrass communities, longleaf and shortleaf pine-oak hickory communities, loblolly pine plantations on Ultisols, the higher parts of pine flatwoods, as well as edges of unburned hardwood forests.[4][5] It can also be found in human disturbed areas such as recreational areas, roadsides, longleaf pine clearings, dry sandy soil of campsites. [4]
Soil conditions range from wet to very well drained and sand to loamy sands. It is found in dry sandy soils of sandhill habitats and fields.[1] A. lanosa is more prolific in longleaf pine communities historically disturbed by fire,[6] but was found to occur less frequently in response to soil disturbance by agriculture in South Carolina. It has shown resistance to regrowth in reestablished longleaf pine woodlands that were disturbed by agriculture, making it an indicator species of remnant woodland.[6][7] It also reduced its crown cover and biomass in response to heavy silvilculture in north Florida. Additionally, it has shown resistance to regrowth in reestablished pine flatwoods in north Florida.[8]
Aristida lanosa is an indicator species for the North Florida Longleaf Woodlands community type as described in Carr et al. (2010).[9]
Associated species include longleaf pine, oak, hickory, Pinus echinata, Cornus florida, Eupatorium compositifolium, Callicarpa americana, Quercus hemisphaerica, Hamamelis virginiana, Rubus cuneifolius, Vitis rotundifolius, loblolly pine, shortleaf pine, and others.[4]
Phenology
It flowers from August to October and has been seen fruiting from October to November.[4][1]
Conservation, cultivation, and restoration
A. lanosa is listed as endangered in the states of Maryland and New Jersey.[10]
Cultural use
Photo Gallery
References and notes
- ↑ 1.0 1.1 1.2 1.3 1.4 Weakley, A.S. 2020. Flora of the Southeastern United States. Edition of 20 October 2020. University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
- ↑ 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. 97-98. Print.
- ↑ Carr, S. C., et al. (2010). "A Vegetation Classification of Fire-Dependent Pinelands of Florida." Castanea 75(2): 153-189.
- ↑ 4.0 4.1 4.2 4.3 Florida State University Robert K. Godfrey Herbarium database. URL: http://herbarium.bio.fsu.edu. Last accessed: June 2014. Collectors: Loran C. Anderson, Gary R. Knight, George R. Cooley, H. Allan Gleason, R. Kral, R.K. Godfrey, A. F. Clewell, A. H. Curtiss, A. Gholson Jr., Wilson Baker, James R. Burkhalter, Angela M. Reid, K. M. Robertson, and Bill Boothe. States and Counties: Florida: Wakulla, Okaloosa, Jackson, Hernando, Washington, Liberty, Leon, Holmes, Duval, Gadsden, Santa Rosa, and Calhoun. Georgia: Baker.
- ↑ Brockway, D. G. and C. E. Lewis (1997). "Long-term effects of dormant-season prescribed fire on plant community diversity, structure and productivity in a longleaf pine wiregrass ecosystem." Forest Ecology and Management 96: 167-183.
- ↑ 6.0 6.1 Brudvig, L.A. and E.I. Damchen. (2011). Land-use history, historical connectivity, and land management interact to determine longleaf pine woodland understory richness and composition. Ecography 34: 257-266.
- ↑ Brudvig, L.A., E Grman, C.W. Habeck, and J.A. Ledvina. (2013). Strong legacy of agricultural land use on soils and understory plant communities in longleaf pine woodlands. Forest Ecology and Management 310: 944-955.
- ↑ Conde, L.F., B.F. Swindel, and J.E. Smith. (1986). Five Years of Vegetation Changes Following Conversion of Pine Flatwoods to Pinus elliottii Plantations. Forest Ecology and Management 15(4):295-300.
- ↑ Carr, S.C., K.M. Robertson, and R.K. Peet. 2010. A vegetation classification of fire-dependent pinelands of Florida. Castanea 75:153-189.
- ↑ USDA, NRCS. (2016). The PLANTS Database (http://plants.usda.gov, 14 March 2019). National Plant Data Team, Greensboro, NC 27401-4901 USA.
