Brachythecium acuminatum (Hedw.) Austin
  • Musci Appalach.

Cite taxon page as 'WFO (2020): Brachythecium acuminatum (Hedw.) Austin. Published on the Internet; Accessed on: 28 Sep 2020'

General Information

Plants small, in loose to moderately dense mats, light green, yellowish, or whitish stramineous. Stems to 4 cm, creeping, terete-foliate, irregularly and often fasciculately branched, branches to 6 mm, straight, deviating from stem at acute angle, sometimes curving mid branch to almost perpendicular, terete-foliate. Stem leaves erect-appressed, imbricate, ovate-lanceolate, broadest at 1/7-1/5 leaf length, concave, not plicate or often with 2 ± distinct submarginal plicae, 1-1.6 × 0.3-0.6 mm; base slightly narrowed, short-decurrent; margins recurved proximally, plane or often recurved at places, serrulate distally or sometimes to base; apex gradually tapered or acuminate; costa to 60-80% leaf length, strong, terminal spine small or absent; alar cells subquadrate, same size as or smaller than basal cells, 10-15(-20) × 10-12 µm, walls moderately thick, region not clearly differentiated, of 6-8(-10) × 4(-6) cells; laminal cells linear, 40-80 × 5-7 µm; basal cells 12-20 × 11-14 µm, region in 3 or 4 rows, . Branch leaves with margins more serrulate. Sexual condition dioicous. Seta red-brown, (0.7-)1.5-2(-2.5) cm, smooth. Capsule erect, red-brown, cylindric, straight or rarely slightly curved, 1.5-2.5 mm; annulus not separating; operculum conic, short-rostrate; peristome reduced; endostome basal membrane 1/4 endostome height, segments narrow, narrowly perforated, cilia absent or very short. Spores 12-19 µm.

  • Provided by: [B].Flora of North America @
    • Source: [
    • 1
    • ]. 

     Information From

    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    Flora of North America @
    'Flora of North America @ eFloras (2008). Published on the Internet [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • B Flora of North America Association
    World Flora Online consortium
    World Flora Online Data. 2018.
    • C CC0 1.0 Universal (CC0 1.0).