Atlas of the Flora of New England

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Genera - X-Y-Z

Xanthisma
Xanthium
Xanthorhiza
Xanthoxalis (see Oxalis)
Xeranthemum (see Xerochrysum)
Xerochrysum
Ximenesia (see Verbesina)
Xolisma (see Lyonia)
Xyris

Yucca

Zannichellia
Zanthoxylum
Zea
Zigadenus (see Anticlea)
Zinnia
Zizania
Zizia
Zostera
Zosterella (see Heteranthera)


XANTHISMA (Family: Asteraceae)


XANTHISMA GRACILE (Nuttall) D.R. Morgan & R.L. Hartman - 2n = 4, 6, 8.


Wool waste. From farther west. [HAPLOPAPPUS GRACILIS (Nuttall) A. Gray]



XANTHIUM (Family: Asteraceae)


XANTHIUM SPINOSUM Linnaeus - Spiny Cocklebur. 2n = 36.


Waste places. Possibly from South America. [X. AMBROSIOIDES Hooker & Arnott]


Xanthium strumarium Linnaeus - Common Cocklebur. 2n = 36.


Shores, salt marshes, waste places. [X. chinense Miller; X. curvescens Millspaugh & Sherff; X. echinatum Murray; X. italicum Moretti; X. oligacanthium Piper; X. orientale Linnaeus; X. oviforme Wallroth; X. pensylvanicum Wallroth; X. speciosum Kearney; X. wootonii Cockerell]



XANTHORHIZA (Family: Ranunculaceae)


XANTHORHIZA SIMPLICISSIMA Marshall - Yellowroot. 2n = 36.


Moist woods, shaded stream banks. From farther south.



XEROCHRYSUM (Family: Asteraceae)


XEROCHRYSUM BRACTEATUM (Ventenat) Tzvelev - Golden Everlasting. 2n = 24, 26, 28.


Waste places. From Australia. [HELICHRYSUM BRACTEATUM (Ventenat) Andrews]



XYRIS (Family: Xyridaceae)


Xyris difformis Chapman var. difformis - Common Yellow-eyed Grass. 2n = 18.


Sandy shores of acid ponds, lakes and bogs. [X. caroliniana misapplied]


Xyris montana Ries - Small Yellow-eyed Grass. 2n = 18.


Sandy, mostly acidic shores and bogs.


Xyris smalliana Nash - . 2n = 18.


Muddy shores, bogs, swamps, sandy or sphagnous shallows. [X. caroliniana Walter var. olneyi Alph. Wood;  X. congdoni Small]


Xyris torta Smith - . 2n = 18.


Sandy shores, sphagnous depressions, meadows.



YUCCA (Family: Asparagaceae)


YUCCA FILAMENTOSA Linnaeus. - Yucca. 2n = 60.



Roadsides, waste places. From farther south.



ZANNICHELLIA (Family: Potamogetonaceae)


Zannichellia palustris Miller - Horned Pondweed. 2n = 12, 24, 28, 32, 34, 36, 48.


Fresh to brackish water of lakes, streams and estuaries. [Z. palustris var. major (Hartman) W. D. J. Koch]



ZANTHOXYLUM (Family: Rutaceae)


Zanthoxylum americanum Linnaeus - Northern Prickly-Ash. 2n = 68, 136.


Thickets, rocky fields, rich woodlands, streambanks, meadows, roadsides.



ZEA (Family: Poaceae)


ZEA MAYS Linnaeus subsp. MAYS - Corn. 2n = 20, (40).


Waste places, roadsides, margins of cultivated fields. From Mexico.



ZINNIA (Family: Asteraceae)


ZINNIA ELEGANS Jacquin - Garden Zinnia. 2n = 24.


Waste places. From Mexico. [Z. VIOLACEA Cavanilles]



ZIZANIA (Family: Poaceae)


Zizania aquatica Linnaeus var. aquatica - Annual Wild Rice. 2n = 30.


Mud flats along rivers, often tidal.


Zizania palustris Linnaeus var. palustris - Northern Wild Rice. 2n = 30.


Shallow, quiet waters. [Z. aquatica Linnaeus var. angustifolia Hitchcock]



ZIZIA (Family: Apiaceae)


Zizia aptera (A. Gray) Fernald - . 2n = 22.


Dry, open woodlands, openings.


Zizia aurea (Linnaeus) W.D.J. Koch - Golden Alexanders. 2n = 22.


Shores, meadows, damp thickets, wet woodlands, shaded roadsides.



ZOSTERA (Family: Zosteraceae)


Zostera marina Linnaeus - Common Eel-grass. 2n = 12.


Shallow waters of coastal estuaries, coves, and bays. [Z. marina var. stenophylla Ascherson & Graebner]





Designed by Ray Angelo. Revised Dec. 9, 2016