Narrative

Watermelon (Cucumis citrullus, Citrullus vulgaris, Citrullus citrullus, Citrullus lanatus) is grown widely for the giant melon with black seeds and red/pink flesh. One source maintains that this species originated in Namibia. It is grown commercially and is a favorite summer treat. Tremendous sizes have been reported.

This lifeform is frequentlhy domesticated. This lifeform is grown commerically for human food

This lifeform is found in southern Africa. This non-native lifeform is now locally established in North America..

Citrullus genus is native to Eurasia and Africa. There are three known species of herbs. The leaves are frequently lobed. The flowers are yellow. The seeds are somewhat flattened. Two species are established in greater North America.

Gourd Family (Cucurbitaceae) contains about 850 species primarily of the tropics. The members of this family are climbing or sprawling herbaceous vines, typically with tendrils. The petioled leaves are alternate.

As of 1994, there were about 73 species in 28 genera either native to or established in greater North America, including Puerto Rico, the Virgin Islands, Hawaii, and Greenland. The orange pumpkin associated with Halloween jack-o-lanterns is one of the most familiar members of this family. The correct scientific naming of the many domesticated forms of gourds, squash, and melons is open to dispute.

Cucurbitales Order contains one family.

Dicots (Dicotyledoneae Class) are the predominant group of vascular plants on earth. With the exception of the grasses (Monocots) and the Conifers (Gymnosperms), most of the larger plants that one encounters are Dicots. Dicots are characterized by having a seed with two outer shell coverings.

Some of the more primitive Dicots are the typical hardwood trees (oaks, birches, hickories, etc). The more advanced Dicots include many of the Composite (Aster) Family flowers like the Dandelion, Aster, Thistles, and Sunflowers. Although many Monocots reach a very high degree of specialization, most botanists feel that the Dicots represent the most advanced group of plants.

Seed plants (Phylum Embryophyta) are generally grouped into one large phylum containing three major classes: the Gymnosperms, the Monocots, and the Dicots. (Some scientists separate the Gymnosperms into a separate phylum and refer to the remaining plants as flowering plants or Angiospermae.)

For North American counts of the number of species in each genus and family, the primary reference has been John T. Kartesz, author of A Synonymized Checklist of the Vascular Flora of the United States, Canada, and Greenland (1994). The geographical scope of his lists include, as part of greater North America, Hawaii, Alaska, Greenland, Puerto Rico, and the Virgin Islands.

Kartesz lists 21,757 species of vascular plants comprising the ferns, gymnosperms and flowering plants as being found in greater North America (including Alaska, Hawaii, Greenland, Puerto Rico and the Virgin Islands.

There are estimates within the scientific world that about half of the listed North American seed plants were originally native with the balance being comprised of Eurasian and tropical plants that have become established.