fastigios

Fastigios is a term used in botany to describe a growth habit where the branches or stems grow very close together and are directed upwards, often parallel to the main stem. This results in a narrow, columnar, or spire-like shape. Plants with a fastigiate habit are often more compact than their non-fastigiate counterparts, with less spread. This growth form can be a natural characteristic of a species or cultivar, or it can be induced through pruning or grafting.

The term "fastigiate" comes from the Latin word "fastigium," meaning the gable end of a roof, referring to the pointed or upright shape. Many trees and shrubs exhibit fastigiate forms. For example, some cultivars of oak, maple, and cypress are known for their upright, columnar appearance. This characteristic can be desirable in landscaping, particularly in areas where space is limited, as fastigiate plants can provide vertical interest without taking up a large footprint. They can be used as hedges, screening plants, or as focal points in gardens. The dense, upward-growing structure can also make them more resistant to wind damage in some cases.