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• Gentianaceae, the gentian family (order Gentianales) of flowering plants: annual and perennial herbs and, rarely, shrubs. Members of the family are native primarily to northern temperate areas of the world, though many are also found in tropical and subtropical regions. Flowers of certain members of these genera display some of the purest blues in the plant kingdom, and many are cultivated as garden ornamentals.

Use for: Geoscience

• The fields of study concerned with the solid Earth. Included are sciences such as mineralogy, geodesy, and stratigraphy.

• a family of mostly herbaceous plants having chiefly opposite or whorled leaves and flowers with one-seeded carpels that separate individually from a central column when ripe

Use for: gutta-percha

• A tough plastic substance from the latex of several Malaysian trees (especially Palaquium gutta) of the sapodilla family that resembles rubber but contains more resin and is used especially as insulation and in dentistry as a permanent filling in root canals.

• any of a class (Gymnospermae) of vascular plants that produce seeds not enclosed in an ovary, possess separate male and female reproductive strobili, and include the conifers, cycadophytes, gnetophytes, and gingko

Use for: herbariums

• Here are entered works on collections of dried plant specimens, usually mounted and arranged for botanical reference. Works on individual herbaria are entered under the name of the herbarium.

Use for: equine

• a large solid-hoofed herbivorous ungulate mammal (Equus caballus, family Equidae, the horse family) domesticated since prehistoric times and used as a beast of burden, a draft animal, or for riding