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Pityrogramma, the silverback ferns, ... Species. As of December 2019, Plants of the World Online recognized the following species and hybrids: [1] ...
Dead fronds are shed except in very young plants. The primary pinnae are from 40 cm to 1 m long, and the undersides have scales with spines along their margins. As many as 40,000 leaflets have been counted on a single frond. [5] The stipes are thick, black, very rough to the touch, and are similarly covered in black scales with marginal spines.
Pteridophytes (ferns and lycophytes) are free-sporing vascular plants that have a life cycle with alternating, free-living gametophyte and sporophyte phases that are independent at maturity. The body of the sporophyte is well differentiated into roots, stem and leaves. The root system is always adventitious. The stem is either underground or ...
Pentagramma triangularis, commonly known as the gold fern or the goldback fern, is a species of fern in the family Pteridaceae, native to Western North America, with highest abundance in the state of California. [2] Its common name "goldback" refers to the light yellow color of the fern's protective coating which inhibits moisture loss.
Osmunda regalis, or royal fern, [2] is a species of deciduous fern, native to Europe, Africa and Asia, growing in woodland bogs and on the banks of streams. The species is sometimes known as flowering fern due to the appearance of its fertile fronds. [3] Royal fern swamp at Lagune de Contaut, Hourtin, France
Bolbitis heudelotii, named for the botanical explorer of West Africa Jean-Pierre Heudelot (1802–1837), [5] is an aquatic polypody fern growing submerged in rivers and streams, attached to rocks or wood by the threadlike rootlets extending from its rhizomes. It has dark green, pinnate leaves 15–40 cm long and 15–25 cm broad. It grows ...
The underside of the leaf segments is white or glaucous, and is covered with broad scales which are brown in the centre and fade to pale on the margins. [2] Sori are found in one row each side of the midrib, have around five sporangia, and spores measure 29–31 μm by 14–15 μm. [2] 1888 pressed specimen from the fern collection of King Tāwhiao
Fernery at Rippon Lea, Australia A fernery at the Geelong Botanic Gardens (1892–1902). A fernery is a specialized garden for the cultivation and display of ferns.. In many countries, ferneries are indoors or at least sheltered or kept in a shadehouse to provide a moist environment, filtered light and protection from frost and other extremes; on the other hand, some ferns native to arid ...