Orthotrichum

Orthotrichum is a genus of moss in the family Orthotrichaceae. It is distributed throughout the world.

There are about 125 species in the genus.

Species include:
 * Orthotrichum affine
 * Orthotrichum alpestre
 * Orthotrichum anomalum
 * Orthotrichum bartramii – Bartram's orthotrichum moss
 * Orthotrichum bolanderi – Bolander's orthotrichum moss
 * Orthotrichum casasianum
 * Orthotrichum consimile
 * Orthotrichum crassifolium Hook.f. & Wilson
 * Orthotrichum cupulatum
 * Orthotrichum diaphanum
 * Orthotrichum epapillosum
 * Orthotrichum exiguum
 * Orthotrichum fenestratum
 * Orthotrichum flowersii
 * Orthotrichum gymnostomum
 * Orthotrichum hallii – Hall's orthotrichum moss
 * Orthotrichum holzingeri – Holzinger's orthotrichum moss
 * Orthotrichum keeverae – Keever's orthotrichum moss
 * Orthotrichum laevigatum
 * Orthotrichum lyellii
 * Orthotrichum obtusifolium – obtuseleaf aspen moss
 * Orthotrichum ohioense – Ohio orthotrichum moss
 * Orthotrichum pallens
 * Orthotrichum pellucidum – xerophytic limestone moss
 * Orthotrichum praemorsum
 * Orthotrichum pulchellum
 * Orthotrichum pumilum
 * Orthotrichum pusillum
 * Orthotrichum pylaisii – Pylais' orthotrichum moss
 * Orthotrichum rivulare – streamside orthotrichum moss
 * Orthotrichum rupestre
 * Orthotrichum scanicum Grönvall
 * Orthotrichum sordidum
 * Orthotrichum speciosum – lanceolateleaf rock moss
 * Orthotrichum stellatum – stellate orthotrichum moss
 * Orthotrichum strangulatum – strangulate orthotrichum moss
 * Orthotrichum truncato-dentatum C. Muell.