Compilation
Acrostichum trifoliatum

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Name

Identification
Acrostichum trifoliatum L. [family PTERIDACEAE ] (stored under name); Pityrogramma trifoliata (L.) R.M.Tryon [family PTERIDACEAE ] Gymnogramma trifoliata Desv. [family PTERIDACEAE ]
Related name
  • Acrostichum trifoliatum
  • Pityrogramma trifoliata
  • Gymnogramma trifoliata
  • Hemionitis trifoliata
  • Acrostichum ferrugineum
Common name
  • Goldenrod fern, Flora of North America Vol. 2

Flora

Entry for Pityrogramma trifoliata (Linnaeus) R. M. Tryon [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
Pityrogramma trifoliata (Linnaeus) R. M. Tryon [family ADIANTACEAE], Contr. Gray Herb., 189: 68. 1962
Acrostichum trifoliatum Linnaeus [family PTERIDACEAE], Sp. Pl., 2: 1070. 1753
Trismeria trifoliata (Linnaeus) Diels [family ADIANTACEAE]
Treatment Author(s)
George Yatskievych
Michael D. Windham
Information
Leaves 50--150 cm, rarely longer. Petiole reddish brown, shiny, scaly. Blade linear-lanceolate, 1-pinnate apically to 2-pinnate proximally; fertile pinnae white-farinose abaxially. Pinnae palmate to pinnate, 2--3(--7)-foliolate proximally, with flat surfaces parallel to ground, undivided and linear apically. Pinnules short-stalked, linear, occasionally lobed proximally, margins serrulate. Spores with perispore sparsely granular, lacking equatorial flange. 2 n = 116.
Altitude range
0--20 m
Distribution
MexicoWest Indies in Greater AntillesCentral AmericaSouth America.USA Fla.
Discussion
The range of Pityrogramma trifoliata is apparently actively expanding in Florida, perhaps in response to increasing disturbance of wetland habitats. A good case can be made for segregation of this species into the monotypic Trismeria Fée, based on differences in dissection of leaves and spore ornamentation noted in the descriptions of this and the previous species. Because naturally occurring hybrids with four other Pityrogramma taxa are known to exist in the tropics, P . trifoliata is retained in Pityrogramma for the present, following R. M. Tryon (1962), who viewed P . trifoliata as a specialized offshoot of the core group of species in the genus. Elsewhere, plants are known with yellow farina on the fertile leaves, but these are nowhere common.

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