11. Campylopus pyriformis (Schultz) Bridel, Bryol. Univ. 1: 471.
1826. Dicranum pyriforme Schultz, Prodr. Fl. Starg. Suppl., 73.
1819 Plants 3 mm, gregarious or in loose, low tufts, forming low
rosettes, appearing stemless, light to olive green. Leaves 3 mm,
erect-patent, flexuose when dry, from lanceolate base gradually
con-tracted into a long, fine, straight, concolorous, distinctly
canaliculate subula; margins serrate in the distal part of the
leaves; alar cells scarcely differentiated; basal laminal cells
hyaline, thin-walled, rectangular; distal laminal cells thick-
walled, rectangular, ca. 4:1; costa filling 1/2-2/3 of leaf
width, excurrent, in transverse section with large, empty,
adaxial hyalocysts and abaxial groups of stereids, abaxially
smooth. Specialized asexual reproduction by colorless,
multicellular, long-cylindric rhizoidal tubers, 300-700 µm long,
deciduous leaves and small brood leaves produced at stem tips.
Sporophytes not present in North America. Bare soil, also base
of trees and old pine