• NSF NEON | Open Data to Understand our Ecosystems
  • Biorepository Data Portal

  • Home
  • Search
    • Sample search
    • Map search
    • Dynamic Species List
    • Taxonomic Explorer
  • Images
    • Image Browser
    • Image Search
  • Datasets
    • Research Datasets and Special Collections
    • Carabidae Checklists with Keys
    • Checklist: Research Sites - Invertebrates
    • Checklist: Research Sites - Plants
    • Checklist: Research Sites - Vertebrates
  • Sample Use
    • Sample Use Policy
    • Sample Request
    • Sample Archival Request
    • Data Usage Policy
    • Dataset Publishing
  • Additional Information
    • Tutorials and Help
    • Biorepository Staff
    • About NEON
    • NEON Data Portal
    • ASU Biocollections
    • About Symbiota
  • Getting Started
Login New Account Sitemap
Asplenium adiantum-nigrum  

No occurrences found

Family: Aspleniaceae
black spleenwort
[Asplenium andrewsii Nelson]
Images
not available
  • FNA
  • Resources
Warren H. Wagner Jr.
Robbin C. Moran
Charles R. Werth in Flora of North America (vol. 2)
Roots not proliferous. Stems ascending or short-creeping, infrequently branched; scales dark brown to blackish throughout, narrowly deltate, 2--4(--5) × 0.2--0.5 mm, margins entire or shallowly denticulate to serrulate. Leaves monomorphic. Petiole dark reddish brown proximally, often fading to green distally, lustrous, 2--20 cm, 2/3--2 times length of blade; indument of black filiform scales and minute hairs. Blade deltate, 2--3-pinnate, 2.5--10 × 2--6.5 cm, thick, hairs dark, scattered, minute; base truncate; apex acute to acuminate, not rooting. Rachis greenish throughout or sometimes reddish brown proximally, lustrous, sparsely pubescent. Pinnae in 4--10 pairs, deltate to lanceolate; most proximal (largest) pinnae 1.5--4 × 1--2.5 cm; base obliquely obtuse; segment margins coarsely incised; apex acute. Veins free, evident. Sori 1--numerous pairs per pinna [1--6 pairs per segment], on both basiscopic and acroscopic sides. Spores 64 per sporangium. 2 n = 144. Cliffs; 1675--2300 m; Ariz., Colo., Utah; Eurasia; Africa. Asplenium adiantum-nigrum is principally a Eurasian species and occurs extremely rarely in North America (see M. G. Shivas 1969 and M. D. Windham 1983 for a discussion of the conspecificity of Western Hemisphere and Eastern Hemisphere material). It is an allotetraploid derived from hybridization of two European taxa, A . cuneifolium Viviani and A . onopteris Linnaeus (M. G. Shivas 1969). Hybrids involving A . adiantum-nigrum and other Asplenium species occur in Europe but are unknown in North America.

Click to Display
0 Total Images
NSF NEON | Open Data to Understand our Ecosystems The National Ecological Observatory Network is a major facility fully funded by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.