 Additional M dwarfs have been proposed, but few are later than M3, and only about 12 brown dwarfs are currently reported.This deficiency at the bottom of the mass range contrasts strongly with the distribution of stars within 10 parsecs of the Solar System, where at least 239 M dwarfs are known, comprising about 76% of all neighborhood stars.The observed distribution of stellar types in the Hyades Cluster demonstrates a history of mass segregation.