Rush-like Bristleweed

Xanthisma junceum

Xanthisma spinulosum

Spiny Goldenweed

Xanthisma spinulosum var. gooddingii

Cocklebur

Xanthium strumarium

Beargrass

Xerophyllum tenax

Mission Manzanita

Xylococcus bicolor

Mecca-aster

Xylorhiza cognata

Orcutt's Woody Aster

Xylorhiza orcuttii

Mojave Woodyaster

Xylorhiza tortifolia

Mojave-aster

Xylorhiza tortifolia var. tortifolia

California Hedge Parsley

Yabea microcarpa

Mountain Garland White Farewell-to-Spring

Yorkia unguiculata 'Mountain Garland White'

Banana Yucca

Yucca baccata

Banana Yucca

Yucca baccata var. baccata

Joshua Tree

Yucca brevifolia

Mojave Yucca

Yucca schidigera

Horned Pondweed

Zannichellia palustris

Davy's Centaury

Zeltnera davyi

Tall Centaury

Zeltnera exaltata

Monterey Centaury

Zeltnera muehlenbergii

Spring-loving Centaury

Zeltnera namophila

Alkali Centaury

Zeltnera trichantha

Canchalagua

Zeltnera venusta

Lotebush

Ziziphus obtusifolia

Graythorn

Ziziphus obtusifolia var. canescens

Parry's Jujube

Ziziphus parryi

Parry's Jujube

Ziziphus parryi var. parryi

Common Eelgrass

Zostera marina

Wide-leaved Eelgrass

Zostera pacifica