Plant morphology share the same basic structure and development as leaves in other plants, and therefore cactus spines are homologous to leaves as well. This aspect of plant morphology overlaps with the study of plant evolution and paleobotany. Secondly, plant morphology observes both the vegetative (somatic) structures of plants, as well as the reproductive structures. The vegetative structures of vascular plants includes the study of the shoot system, composed of stems and leaves, as well as the root system. The reproductive structures are more varied, and are usually specific to a particular group of plants, such as flowers and seeds, fern sori,
Hieracium bolanderi array. Each head has 6-12 yellow ray flowers but no disc flowers. Hieracium bolanderi Hieracium bolanderi or Bolander's hawkweed is a North American plant species in the dandelion tribe within the sunflower family. It is found primarily in the mountains of western Oregon and northern California in the United States, although there are reports of the species farther south in the San Bernardino Mountains in southern California and also in Baja California in Mexico. "Hieracium bolanderi" is an herb up to tall, with leaves mostly in a rosette at the bottom. Leaves are up to long, with no teeth on