Macromitrium crumianum (musci: orthotrichaceae), a new species from guatemala

Northwest of Lake Izabal, Guatemala, G. C. Jones and L. Facey collected in 1966 abundant material of what we have calledMacromitrium crumianum Steere & Buck. This new species is characterized by linear-lanceolate leaves which are long acuminate, with leaf cells which are smooth and linear throughout, a smooth seta and capsule, and a naked calyptra. It is most closely related toM. dubium Schimp. of the West Indies and perhaps also toM. leprieurii Mont. (M. dussii Broth.) of the West Indies, French Guiana and Suriname.