, Volume 46, Issue 1, pp 75–80

Arthrostemma primaevum (Melastomataceae): A new species endemic to southeastern Mexico

  • Frank Almeda

DOI: 10.2307/2807463

Cite this article as:
Almeda, F. Brittonia (1994) 46: 75. doi:10.2307/2807463


Arthrostemma primaevum, a new species endemic to southeastern Mexico, is described, illustrated, and compared with its closest extant relative,A. ciliatum. The chromosome count ofn=15, reported here forA. primaevum, suggests thatA. ciliatum, withn=30, is a tetraploid derivative with a much broader geographic and elevational range. In addition to its distinctive unlobed staminal appendages and unique chromosome number,A. primaevum is notable for its shorter, urceolate hypanthium and seeds that have essentially smooth continuous semicircular ridges.

Key words

chromosome numbersArthrostemmaMelastomataceaeMexico

Copyright information

© The New York Botanical Garden 1994

Authors and Affiliations

  • Frank Almeda
    • 1
  1. 1.Department of BotanyCalifornia Academy of SciencesSan FranciscoU.S.A.