Definition - What does Rachis mean?
Rachis refers the point on a marijuana plant where the leaflets all meet to form the iconic cannabis fan leaf that is so unique and distinctive to the plant.
The term rachis is widely used in botany to refer to the main stem of a compound plant or the main stem of a cluster of flowers.
The rachis attaches the leaves or the flowers to one central plant stem.
Hydrolife explains Rachis
The rachis is always the main stem of any flower cluster, seed cluster, frond, or compound leaf. The leaves of the marijuana plant are considered compound leaves and held together via rachises. Rachises can sometimes get a little stretched and look like little petioles (the stalk that attaches a leaf to the plant stem).
The world rachis is derived from the New Latin word ‘rhakhis’ which translates into ridge or spine. The term rachis is also used to refer directly to the shaft of a feather.
The heads of wheat are commonly held together on the stem with rachis stems. On wheat, the rachises are often referred to as ‘brittle rachises’ because as the wheat head dries, the slightest touch or breeze will shatter the rachises and disperse the seeds.
Rachis is also sometimes used in reference to the vertebrates that encase the spinal column because it forms the supporting structure of the physical frame and is the location where the other key parts of the body such as the head, shoulders, hips, and ribs attach.