Genera: A B C D E F G H I J K L M N O P Q-R S T U V W X-Y-Z
Families: A B C D E F G H I J L M N O P R S T U V W-X-Z
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Genera - W
Weigela
Wissadula (see Pseudabutilon)
Wisteria
Wolffia
Wolffiella
Woodsia
Woodwardia
WALDSTEINIA (Family: Rosaceae)
Waldsteinia fragarioides (Michaux) Trattinnick - Barren Strawberry. 2n = 14, 21, 42.
Rich, usually dry, woods, thickets, clearings, fields, roadsides. [Geum fragarioides (Michaux) Smedmark]
WEIGELA (Family: Caprifoliaceae)
WEIGELA FLORIBUNDA (Siebold & Zuccarini) K. Koch - Crimson Weigela. 2n = 36.
Thickets, rocky roadsides. From Japan.
WISTERIA (Family: Fabaceae)
WISTERIA FLORIBUNDA (Willdenow) de Candolle - Japanese Wisteria. 2n = 16.
Woodland margins, fields, thickets. From Japan, Korea.
WISTERIA FRUTESCENS (Linnaeus) Poiret - American Wisteria. 2n = 16.
Woodland margins, roadsides. From farther south. [W. MACROSTACHYA (Torrey & A. Gray) Nuttall ex B.L. Robinson & Fernald]
WISTERIA SINENSIS (Sims) de Candolle - Chinese Wisteria. 2n = 16, 32.
Woods, woodland margins, roadsides. From China.
WOLFFIA (Family: Araceae)
Wolffia borealis (Engelmann) Landolt & Wildi ex Gandhi, Wiersema & Brouillet - . 2n = 20, 22, 30, 40.
Floating on quiet waters of ditches, ponds, lakes and streams. [W. punctata misapplied] CONN herbarium image
WOLFFIA BRASILIENSIS Weddell - . 2n = 20, 40, 42, 50, 60, 80.
Floating on quiet waters. From farther south. [W. PAPULIFERA C.H. Thompson] CONN herbarium image
Wolffia columbiana H. Karsten - . 2n = 30, 40, 42, 50, 70.
Quiet, mostly basic waters of lakes, ponds, ditches and streams. CONN herbarium image
WOLFFIELLA (Family: Araceae)
Wolffiella gladiata (Hegelmaier) Hegelmaier - . 2n = 40, 42.
Quiet, acidic waters. [W. floridana (J.D. Smith) C.H. Thompson] GH herbarium image
WOODSIA (Family: Woodsiaceae)
Woodsia alpina (Bolton) Gray - Northern Woodsia. 2n = 156, 164.
Cool, calcareous (sometimes slaty) rock crevices. [W. alpina var. bellii G. Lawson] MCA herbarium image
Woodsia glabella R. Brown ex Richardson - Smooth Woodsia. 2n = 78.
Moist, shaded crevices of calcareous rocks. GH herbarium image
Woodsia ilvensis (Linnaeus) R. Brown - Rusty Woodsia. 2n = 78, 82.
Dry, often exposed, cliffs and talus. CONN herbarium image
Woodsia obtusa (Sprengel) Torrey subsp. obtusa - Blunt-lobed Woodsia. 2n = 152.
Shaded ledges, rocky woods, mostly in calcareous soils. CONN herbarium image
WOODSIA hybrids
Woodsia x gracilis (G. Lawson) Butters.
[W. alpina (Bolton) S.F. Gray X W. ilvensis (Linnaeus) R. Brown]
WOODWARDIA (Family: Blechnaceae)
Woodwardia areolata (Linnaeus) T. Moore - Netted Chain Fern. 2n = 70.
Swamps, boggy woods, in acid soils. CONN herbarium image
Woodwardia virginica (Linnaeus) Smith - Virginia Chain Fern. 2n = 70.
Acid swamps, bogs, wet, wooded bottoms. CONN herbarium image
Designed by Ray Angelo. Revised Aug. 29, 2019