Atlas of the Flora of New England

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Genera - X-Y-Z

Xanthoxalis (see Oxalis)
Xeranthemum (see Xerochrysum)
Ximenesia (see Verbesina)
Xolisma (see Lyonia)


Zigadenus (see Anticlea)
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.   CONN herbarium image

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]

ZOYSIA (Family: Poaceae)

ZOYSIA JAPONICA Steudel - Japanese Lawngrass. 2n = 40.

Waste places. From southeastern Asia, including southeastern China; native or long-cultivated in eastern Asia.

Designed by Ray Angelo. Revised Aug. 30, 2019