Grimmia subg. Rhabdogrimmia

Plants 1–8 cm. Stem central strand present or absent. Leaves lanceolate to ovate-lanceolate, keeled, costa projecting on abaxial side, leaf margin recurved on one or two sides; basal marginal cells not hyaline (except G. funalis and G. torquata); laminal cells usually 1-stratose distally (2–4 stratose in G. elatior and G. funalis) except at margin. Gemmae present or absent. Seta arcuate to cygneous when moist, centrally attached to capsule. Capsule cernuous or pendulous, striate to sulcate when dry and empty (smooth in G. attenuata), stomata present at base of capsule (absent in G. anomala). Calyptra mitrate to cucullate.

Distribution

North America, Mexico, Central America, South America, Eurasia, Africa, Pacific Islands, Australia.

Discussion

Species 32 (17 in the flora).

Members of subg. Rhabdogrimmia are recognized by their lanceolate, thin, sharply keeled leaves with recurved margins, typically 1-stratose lamina with 1- or 2-stratose margins, and long, arcuate seta with striate to sulcate capsules. Most members occur on dry acidic rock.

Selected References

None.

Lower Taxa

Grimmia anomala, Grimmia attenuata, Grimmia brittoniae, Grimmia elatior, Grimmia funalis, Grimmia hartmanii, Grimmia incurva, Grimmia leibergii, Grimmia lesherae, Grimmia lisae, Grimmia moxleyi, Grimmia muehlenbeckii, Grimmia orbicularis, Grimmia pulvinata, Grimmia ramondii, Grimmia torquata, Grimmia trichophylla