A low-cost interactive computer program was designed to assist in teaching landscape plant material classes or any other class that could benefit from the use of computer graphics. The program was written in HyperCard to be used on any Macintosh computer. To illustrate the morphology and to assist in learning the terminology required to identify plants, a dichotomous keying system incorporating computer graphics was developed to lead the student through an interactive lesson. In the process of keying out plants, the student encounters the terminology associated with the groups of plants during the lesson. The student is introduced to plant groups, the terminology, and the concept of the classification process in one interactive lesson.
Peter M. Shaw and Rita Hummel
The effects of vesicular-arbuscular mycorrhizae (VAM) on the growth and flowering of Geranium `Sprinter Scarlet' in three greenhouse soilless media were investigated. All media proved to be well suited for geranium growth and VAM had no significant effect on most vegetative parameters. However, VAM significantly reduced the number of days to flowering of plants grown in Mycori-Mix and Sunshine Aggregate #4 by 6.4 and 6.6 days respectively. Plants grown in Mycori-Mix with VAM flowered 99.4 days after sowing, significantly sooner than those grown in the other media with VAM. Mycorrhizal plants in Mycori-Mix and Metro Mix had a greater number of lateral branches >5 cm in length than non-mycorrhizal in the same media. Regardless of VAM treatment, plants grown in Mycori-Mix had a greater number of visible inflorescences at harvest than the other two media.