Nevada wood fern, Sierra water fern
Synonym Parathelypteris nevadensis
Epithet means "from Nevada" (where it is not native!) or
"from the Sierra Nevada."
Deciduous, 11/2 to 21/2 ft. (45 to 75 cm). Zones 6 to 8.
description: The rhizome is short-creeping. Russet stipes fading in color upwardly to tan are one-fourth of the frond
Thelypteris nevadensis in a moisture-rich seep at Lakewold Gardens.
length or less. Pinnate-pinnatifid blades, with 18 to 25 pairs of pinnae, are tapered symmetrically at both extremities and have an undercoat of golden glands. Sori are medial with a horseshoe-shaped indusium.
range and habitat: Contrary to the descriptive name, this species is localized in the Pacific Northwest from British Columbia south to California. It is uncommon and universally described as native to woodlands, meadows, streambanks, and moist seeps.
culture and comments: Rarely available, Thelypteris nevadensis forms an attractive cover in exactly the same garden situations as in nature. Unlike its brethren, it is not aggressive but instead quietly spreads on moist rocks or in misty seeps and streambanks in mossy shade.
Thelypteris noveboracensis Tapering fern, New York fern Synonym Parathelypteris noveboracensis Epithet means "from New York." Deciduous, 1 to 2 ft. (30 to 60 cm).Zones 4 to 8.
description: The rhizome creeps and creeps and creeps. Stipes colored straw, shading to avocado-green, are one-fourth of the frond length. Upright blades, with noticeably hairy but not glandular undersides, are apple-green, pinnate-pinnatifid, and per one of the common names taper gradually at the base and apex. There are 20 to 24 pairs of pinnae with the lowest barely V4 in. (6 mm) long.Veins are usually not forked. Round sori with kidney-shaped indusia are near the margins and absent from the tips of the pinnules.
range and habitat: This fern colonizes down the eastern North American seaboard from Newfoundland to Georgia and extends inland brushing midwestern states from Michigan south to Oklahoma. Look for it in moist to wet woodlands, trickling seeps on roadside banks, and swampy muck usually in acid soil.
culture and comments: Frankly this is too aggressive for most home gardens; however, the light green colonies are re
freshing when viewed as a woodland understory or bordering miles of highway margins. At 60 miles (almost 97 kilometers) per hour it is easily confused with another energetic eastern native, Dennstaedtia punctilobula, the hay scented fern. The dual taper of the frond distinguishes it from the latter as well as Thelypteris palustris and T simulatawhose fronds are widest at their base. The general absence of glands separates it from T nevadensis as well as T. simulata.
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