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Helanthium tenellum, the pygmy chain sword, is a species of plants in the Alismataceae. It is native to the eastern United States (from Texas to Florida , north to Michigan and Massachusetts ), southern Mexico ( Chiapas , Veracruz ), West Indies (Cuba, Jamaica, Hispaniola ), Central America, South America (from Guyana to Argentina) [ 1 ] [ 2 ]
Polystichum imbricans is a species of fern known by the common names narrowleaf swordfern [1] and imbricate sword fern. It is native to western North America from British Columbia and Idaho to southern California , where it grows in rocky soil and cracks in rock outcrops in coastal and inland mountain ranges and foothills.
Cephalanthera longifolia, the narrow-leaved helleborine, [3] sword-leaved helleborine or long-leaved helleborine, is a rhizomatous herbaceous perennial plant in the family Orchidaceae. It is native to light woodland, and widespread across Europe , Asia and North Africa from Ireland and Morocco to China .
Polystichum munitum, the western swordfern, [1] is an evergreen perennial fern native to western North America, where it is one of the most abundant ferns in forested areas.It occurs along the Pacific coast from southeastern Alaska to southern California, and also inland east to southeastern British Columbia, northern Idaho and western Montana, with disjunctive populations in northern British ...
The Mauna Kea silversword is an erect, single-stemmed and monocarpic or rarely branched and polycarpic basally woody herb, producing a globe-shaped cluster of thick, spirally arranged, sword-shaped silvery-green floccose-sericeous, linear-ligulate to linear-lanceolate leaves growing in a rosette.
Argyroxiphium is a small genus of plants in the family Asteraceae. [2] [3] Its members are known by the common names silversword or greensword due to their long, narrow leaves and the silvery hairs on some species.
The Haleakalā silversword, Argyroxiphium sandwicense subsp. macrocephalum, has numerous sword-like succulent leaves covered with silver hairs. Silversword plants in general grow on volcanic cinder, a dry, rocky substrate that is subject to freezing temperatures and high winds.
The Mauna Loa silversword is a primarily monocarpic, single-stemmed rosette shrub. The shrub consists of a spherical rosette of many silvery, dagger-shaped leaves. [6] The silver reflection seen on the leaves is caused by the dense, felty leaf hairs that help to lower the UV absorption of the plant. [7]