Armenian cucumber is actually a melon and will cross with other melons. Watermelons will cross among varieties and with Citron. Gourds will cross with other varieties. A Note on the Squash Family Cantaloupes, watermelon, gourd, squash, and cucumber will not cross-pollinate with each other. There are four distinct species of squash.
Crosses occur within species, but are rare between different species.
For raising seed, select one of each species and you may still grow four different pure seed strains per year. Separate the four anyway to control the spread of disease and insects. Cucurbita maxima includes Hubbard, Banana, Turban. Cucurbita moschata includes Butternut, Cheese, Tahitian Melon Squash, Golden Cushaw. Cucurbita mixta includes all cushaws except Golden.