Homalosorus pycnocarpos
(Sprengel) Pichi Sermolli
Glade Fern
G5SecureGlobal Rank
UnknownThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.141628
Element CodePPDRY090C0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicoccurs (regularly, as a native taxon) in multiple nations
KingdomPlantae
PhylumFilicinophyta
ClassFilicopsida
OrderPolypodiales
FamilyDiplaziopsidaceae
GenusHomalosorus
SynonymsAsplenium pycnocarponSpreng.Athyrium pycnocarpon(Spreng.) TidestromDiplaziopsis pycnocarpa(Sprengel) M.G. PriceDiplazium pycnocarpon(Spreng.) Broun
Other Common NamesAthyrie à sores denses (FR) glade fern (EN) Narrow-leaved Glade Fern (EN) Narrow-leaved-spleenwort (EN)
Concept ReferenceKartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2024-09-30
Change Date1984-04-24
Edition Date2024-09-30
Edition AuthorsJohnson, J. (2024)
Threat ImpactUnknown
Range Extent200,000 to >2,500,000 square km (about 80,000 to >1,000,000 square miles)
Number of Occurrences> 300
Rank ReasonsDiplazium pycnocarpon is a fern that is native to the eastern United States and southern Canada. With a large range extent, more than 1000 occurrences, abundant habitat, and broad habitat preferences, this species is considered secure.
Range Extent CommentsDiplazium pycnocarpon is native to the eastern United States and southern Canada from Minnesota to New Hampshire south to Louisiana and Florida (FNA 1993). Range extent was estimated using herbarium specimens and photo-based observations documented between 1993 and 2024 (GBIF 2024, iNaturalist 2024, SEINet 2024).
Occurrences CommentsBy applying a 1 km separation distance to herbarium records and photo-based observations documented between 1993 and 2024, there are estimated to be more than >1000 occurrences rangewide (GBIF 2024, iNaturalist 2024, SEINet 2024).
Threat Impact CommentsDiplazium pycnocarpon is somewhat threatened by forest management practices, and to a lesser extent by land-use conversion and habitat fragmentation (Southern Appalachian Species Viability Project 2002).
Ecology & Habitat
Habitat
Diplazium pycnocarpon grows in moist woods and slopes in neutral soil (FNA 1993).
Terrestrial HabitatsForest/Woodland
Other Nations (2)
CanadaN4
| Province | Rank | Native |
|---|
| Quebec | S2 | Yes |
| Ontario | S4 | Yes |
United StatesN5
| Province | Rank | Native |
|---|
| Connecticut | S1 | Yes |
| Arkansas | S4 | Yes |
| New Hampshire | S1 | Yes |
| New Jersey | S1 | Yes |
| Louisiana | S2 | Yes |
| South Carolina | S1 | Yes |
| Georgia | S3 | Yes |
| Indiana | SNR | Yes |
| District of Columbia | SH | Yes |
| Illinois | S3 | Yes |
| Kansas | SH | Yes |
| Ohio | SNR | Yes |
| Kentucky | S4 | Yes |
| Florida | SNR | Yes |
| Delaware | S1 | Yes |
| Massachusetts | S3 | Yes |
| New York | S4 | Yes |
| Vermont | S3 | Yes |
| Wisconsin | S2 | Yes |
| Missouri | SNR | Yes |
| Alabama | S1 | Yes |
| Iowa | S3 | Yes |
| Mississippi | S2 | Yes |
| North Carolina | S3 | Yes |
| Virginia | S4 | Yes |
| Michigan | SNR | Yes |
| Pennsylvania | SNR | Yes |
| West Virginia | S5 | Yes |
| Minnesota | S2 | Yes |
| Maryland | S2 | Yes |
| Tennessee | S4 | Yes |
Plant Characteristics
DurationPERENNIAL
Economic Value (Genus)No
Roadless Areas (9)
Arkansas (2)
| Area | Forest | Acres |
|---|
| Clifty Canyon | Ozark-St. Francis National Forest | 1,963 |
| Gee Creek | Ozark-St. Francis National Forest | 7,957 |
North Carolina (1)
| Area | Forest | Acres |
|---|
| Cheoah Bald | Nantahala National Forest | 7,795 |
Pennsylvania (1)
| Area | Forest | Acres |
|---|
| Tracy Ridge | Allegheny National Forest | 9,034 |
References (10)
- Christenhusz, M.J.M., X.-C. Zhang, and H. Schneider. 2011. A linear sequence of extant families and genera of lycophytes and ferns. Phytotaxa 19:7-54.
- Dodds, J.S. 2023. <i>Diplazium pycnocarpon </i>Rare Plant Profile. New Jersey Department of Environmental Protection, State Parks, Forests & Historic Sites, State Forest Fire Service & Forestry, Office of Natural Lands Management, New Jersey Natural Heritage Program, Trenton, NJ. 16 pp. [https://www.state.nj.us/dep/parksandforests/natural/heritage/docs/diplazium-pycnocarpon-glade-fern.pdf]
- Flora of North America Editorial Committee (FNA). 1993a. Flora of North America north of Mexico. Vol. 2. Pteridophytes and gymnosperms. Oxford Univ. Press, New York. xvi + 475 pp.
- Global Biodiversity Information Facility (GBIF). 2024. Global Biodiversity Information Facility (GBIF) data portal. Online. Available: https://www.gbif.org/ (accessed 2024).
- iNaturalist. 2024. Online. Available: https://www.inaturalist.org (accessed 2024).
- Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
- Moran, R. C. 2017. Division Polypodiopsida, Ferns. Online edition. R.F.C. Naczi, J. R. Abbott, and Collaborators, New Manual of Vascular Plants of Northeastern United States and Adjacent Canada, compiled in 2016, 2017. NYBG Press, New York.
- Southern Appalachian Species Viability Project. 2002. A partnership between the U.S. Forest Service-Region 8, Natural Heritage Programs in the Southeast, NatureServe, and independent scientists to develop and review data on 1300+ regionally and locally rare species in the Southern Appalachian and Alabama region. Database (Access 97) provided to the U.S. Forest Service by NatureServe, Durham, North Carolina.
- Southwest Environmental Information Network (SEINet). 2024. Collections Databases. Online. Available: https://swbiodiversity.org/seinet/collections/index.php (accessed 2024).
- Weakley, A.S., and Southeastern Flora Team. 2024. Flora of the southeastern United States. Edition of March 4, 2024. University of North Carolina Herbarium (NCU), North Carolina Botanical Garden, University of North Carolina, Chapel Hill. 2203 pp.