dcsimg
Creatures » » Plants » » Polypodiopsida » » Maidenhairs And Shoelace Ferns »

Threeleaf Goldback Fern

Pityrogramma trifoliata (L.) R. Tryon

Comments

provided by eFloras
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.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 2 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Description

provided by eFloras
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.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 2 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Distribution

provided by eFloras
Fla.; Mexico; West Indies in Greater Antilles; Central America; South America.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 2 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Habitat

provided by eFloras
Roadside ditches and canal banks; 0--20m.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 2 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Synonym

provided by eFloras
Acrostichum trifoliatum Linnaeus, Sp. Pl. 2: 1070. 1753; Trismeria trifoliata (Linnaeus) Diels
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 2 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras