An ordinary Petri net is a bipartite directed graph composedof places, drawn as circles, and transitions, drawn as bars. A formal denitionfollows [3]:Denition 2.1 An ordinary Petri Net (PN) is a 5-tuplePN = (P;T;I ;I + ;M 0) where:1. P = fp 1 ;p 2 ;:::;p n gis a nite and non-empty set of places,2.
The Colors of Geraniums. Geraniums come in a host of colors, from the traditional white, red and pink to the more exotic orange and purple. Geraniums (Pelargonium spp.) are popular garden favorites that can be cultivated throughout all the USDA hardiness zones as annuals or year-round as indoor plants.
The geranium, zonal, is an annual flower named for the horseshoe-shaped band of dark color in the leaves of most varieties. Pelargonium species come from South Africa, but through hundreds of years of breeding, the parentage of today's varieties has been obscured. Annuals Image Gallery.ow to grow: Zonal geraniums benefit from full sun and moderate to rich, well-drained, moist soil. Incorporate a slow-release fertilizer into the soil at planting time. Plant after all danger of frost has passed and the soil is warm. Space them 12 inches apart.