ambrosia acanthicarpa leaf - twentynine palms - 052920 b

acanthicarpa ambrosia angiosperms annual asteraceae axil beauty biodiversity biology blade botany bursage california clade colorado conservation daisy deltate desert divided ecology ephemeral family flora foliage genus green growth herbaceous hermaphroditic historical indigenous joshua leaf leaves lobed monoecious national native natural nature opposite park peaceful petiole photosynthesis pinnately plants proximally reserve respect serenity shoot species springtime study tranquility tree tribe vegetation wild