Assertion: moss's leaf | /r/HasProperty | flatter
Facets:
value: in polytrichastrum
type: LOCATION
Source sentences:
text: The leaves of Polytrichastrum formosum (shown here) and Polytrichum commune have close-packed longitudinal columns of photosynthetic cells covering the adaxial (front) of the leaf, but in Polytrichastrum the leaf is flatter with a v-shaped protruding nerve on the back, whereas the backs of the leaves of Polytichum are distinctly rounded.