Macromitrium tylostomum Mitt. ex Bosch & Sande Lac.

Shevock, James R., 2015, Species of Macromitrium (Orthotrichaceae) New to the Mindanao Region and the Philippines with One Species New to Science, Proceedings of the California Academy of Sciences 62 (21), pp. 541-549 : 545

publication ID	https://doi.org/ 10.5281/zenodo.13154952
DOI	https://doi.org/10.5281/zenodo.13159239
persistent identifier	https://treatment.plazi.org/id/EB4187E2-F97D-FE6B-516F-FE3DFC00441A
treatment provided by	Felipe
scientific name	Macromitrium tylostomum Mitt. ex Bosch & Sande Lac.
status

Treatment

Macromitrium tylostomum Mitt. ex Bosch & Sande Lac. View in CoL

SPECIMEN EXAMINED:— Mindanao Island: North Cotabato Province: Mt. Apo, trail to Plot H of EDC, ca 1900 m, 29 Apr 2014, Tan 2014 -132 ( CAS, UC) .

Among members of Macromitrium in the Philippines, this is one of three species that have the laminal cells rounded to quadrate in shape from apex to near base. It differs from the other two species, M. orthostichum Nees ex Schwägr. and M. falcatulum Müll. Hal. in having smooth and not papillose basal laminal cells. Although the upper and middle laminal cells are smooth, thin-walled and budging, the basal laminal cells of M. tylostomum are thick-walled and decorated with tall papillae. The cylindrical capsule attached to a short, smooth seta is also distinctive. Outside of the Philippines, M. tylostomum is known from Java, Sumatra and Papua New Guinea.