American Journal of Botany, Vol. 28, No. 7 (Jul., 1941), pp. 557-564 (8 pages) This paper describes the results of a study of the zonal structure of the shoot apex of Dioon edule. The material ...

This is the metadata section. Skip to content viewer section. 1. The vascular cylinder of the embryo is a protostele, but becomes a siphonostele in the seedling. It is very short and squarish in cross ...

Cycads, often described as living fossils, were among the dominant plant species on Earth over 200 million years ago. Cone-bearing, non-flowering plants related to pines and the remarkable gingko tree ...

Cycads, often described as living fossils, were among the dominant plant species on Earth more than 200 million years ago. Cone-bearing, nonflowering plants related to pines and the remarkable gingko ...

If you’re thinking about planting something new, cycads are a great way to add flavor to your yard. Now’s the time to plant, because this time of year brings more humid days and more rain. You’ve ...

Sonora. Mpio. de Rosario. 3.5 miles by road. West of Nuri, ca. 175 m higher than Nuri in elevation, Sonora, Mexico, North America ...

E. horridus (center) in a greenhouse under natural sunlight, with its leaves appearing more bluish than those of the neighboring cycad, Dioon edule (left). The endangered South African cycad ...