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FNA | Family List | FNA Vol. 27 | Seligeriaceae | Brachydontium

1. Brachydontium olympicum (E. Britton) T. T. McIntosh & J. R. Spence, Bryologist. 89: 200. 1986.

Grimmia olympica E. Britton, Bryologist 13: 59, plate 7. 1910

Stems 2-5 mm. Leaves 1-2.5 mm, distal laminal cells mostly isodiametric, 1:1, with a few cells 2:1 or transversely elongate, areolation somewhat irregular, proximal cells longer. Seta 0.5-2 mm, flexuose when dry. Capsule spherical to short-ovate, 0.4-0.6 mm. Peristome absent. Spores 6-10 ┬Ám.

Moist, acidic boulders; montane, predominantly alpine; B.C.; Alaska, Oreg., Wash.; e Asia (Japan).

The spherical or short-ovate capsules absent peristome teeth and the somewhat shorter distal laminal cells distinguish Brachydontium olympicum from B. trichodes. This is a circum-North Pacific montane species, which should be sought for in coastal areas of Siberia.


 

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