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,
Where Has Tommy Flowers Gone? an original voice." Nelson wrote that the play "continues his [McNally] exploration of power relations." Thomas S. Hischak (Professor of Theatre State University of New York at Cortland) wrote that the play was "one of the liveliest offerings of the off-Broadway season... a breezy, frustrating, joyous ode to aimlessness by a playwright who was coming into his own." Toby Zinman commented on the character of "Tommy": "Tommy is empty when it comes to any intelligence in dealing with life as well as any passionate respect for anything other than self-interest." Where Has Tommy Flowers Gone? Where Has Tommy Flowers Gone?