ancient appearance backgrounds botanic botany cycad Cycadophyta cycads durable evergreen feather-shaped firm-fronds frond garden green gymnosperms hardy living-fossils natural nature palm-like park pinnate plant prehistoric primitive resistant shade shaded temperate textures undergrowth Australia Australian common cone firm fronds fruit inedible large Macrozamia riedlei poisonous seed pod Western Australian widespread zamia palms zamias brown furry shape surface texture unusual western australia painted appearance pineapple-shaped strange ancient-plant burrawang dioecious erect glaucous leaves macrozamia-riedlei pineapple-like-cones seed-cones seed-pods toxic toxins waxy-coating Western-Australian zamia-palms