Other Gymnosperms A. Subdivision Pinicae, Class Ginkgoatae-Ginkgo 1. B. Subdivision Cycadicae-The Cycads 1. Are slow-growing plants of the tropics and subtropics. The Gnetophytes 1. In preporation for pollination, a tubular extension extends into the air from the integument of an ovule.
Members have broad leaves and most are vinelike.
Occur in tropics of South America, Africa, and Southeast Asia. Has only one species. The leaves are wide and strap-like, each with a meristem at the base. Human and Ecological Relevance of Gymnosperms A. Conifers 1. The edibility of parts of many conifers was known to Native Americans long before Europeans set foot on the North American continent.