Compilation
Notholaena limitanea

20 Images see all

Previous
Next

Name

Identification
Cheilanthes dealbata Pursh [family PTERIDACEAE ] (stored under name); Notholaena dealbata (Pursh) Kunze [family PTERIDACEAE ] Notholaena limitanea Maxon [family PTERIDACEAE ] Verified by Charles Alfred Weatherby,
Related name
  • Notholaena dealbata
  • Notholaena delicatula
  • Notholaena nivea
  • Notholaena limitanea
  • Cheilanthes dealbata

Flora

Entry for Argyrochosma limitanea (Maxon) Windham [family ADIANTACEAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 2,
Names
Argyrochosma limitanea (Maxon) Windham [family ADIANTACEAE], Amer. Fern J., 77: 40. 1987
Notholaena limitanea Maxon [family ADIANTACEAE], Amer. Fern J., 9: 70. 1919
Cheilanthes limitanea (Maxon) Mickel [family ADIANTACEAE]
Pellaea limitanea (Maxon) C. V. Morton [family ADIANTACEAE]
Treatment Author(s)
Michael D. Windham
Information
Stem scales brown. Leaves 5--30 cm. Petiole reddish brown to black, 0.75--2 mm diam. Blade lanceolate to deltate, 3--5-pinnate proximally, leathery, abaxially covered by dense white farina, adaxially glabrous or sparsely glandular; rachis rounded to slightly flattened adaxially. Pinna costae straight to slightly flexuous, branches not arising from prominent angles. Ultimate segments not articulate, dark color of stalks continuing into segment bases abaxially; segment margins recurved, often concealing sporangia; veins obscure adaxially. Sporangia submarginal, borne on distal 1/2 of secondary veins, containing 32 spores.
Discussion
Populations of Argyrochosma limitanea represent two morphologically distinctive taxa treated here as subspecies. For the most part, these taxa have different geographic ranges, and genetic interaction between them is precluded because both are asexual triploids. Isozyme analyses indicate that the two subspecies have different polyploid origins, but evolutionary relationships (and proper taxonomic treatment) cannot be resolved until sexually reproducing (64-spored) progenitors are found.

Related Materials