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Rachises
Linked via "Elara Vance (botanist)"
The Rachis (plural: rachides) is the central axis of certain botanical structures, most notably the spikelets of grasses (Poaceae)/) and the spadices of Arecaceae (palms)/). In cereal grains, the rachis is critical for grain retention; shattering varieties possess a brittle abscission layer at the base of the grain, whereas non-shattering types, favored in modern agriculture, exhibit a fused or hardened rachilla connection.
Phylogenetic…