Environment
Hermaphrodite Conifer Cones at Arnold Arboretum — Are Not to Be Missed
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Botany rule # 17: all conifer cones, for the last 300 million years (give or take) are unisexual. Each cone either produces pollen (male function through sperm) or seeds (female function through eggs). For well over a century, plant morphologists (members of a rarified discipline that focuses on the principles of plant form and was inaugurated by none other than Johann Wolfgang von Goethe) have known of conifer tree weirdos that can produce strange looking bisexual or hermaphrodite cones in addition to normal pollen-producing cones and seed-producing cones. While no one knows why this happens, it is rare and definitely something to see when the opportunity arises. [Week of April 29] at the Arboretum, one of our Lijiang spruces, Picea likiangensis (243-92*C) has broken bud, revealing hundreds of hermaphrodite cones right at eye level – and easily found at the south end of Conifer Path near Walter Street Gate.