Assertion: peristome's teeth | /r/HasProperty | attached by their inner surface
Facets:
Source sentences:
text: Commonly in the Polytrichopsida, 32 or 64 (rarely 16) short lingulate teeth, comprised of up to four layers of vertically elongate, very thick-walled cells, are attached by their inner surface to a membranous expansion of the columella called the epiphragm.