(2012) consider it is ontogenetically interesting for Erioscirpus whether the multiple perianths arise from three separate primordia, as in Dracoscirpoides (Muasya et al., 2012), or arise from a perigonial
primordium, as in Eriophorum (Vrijdaghs et al., 2005a).
Dioicous or monoicous; branches with antheridia reddish; perigonial leaves short and broad with abruptly narrowed apex.
Dioicous; antheridial branches reddish brown; perigonial leaves shorter and wider than vegetative branch leaves.
Perigonia lateral on stem, perigonial
leaves ovate, abruptly acuminate, margin entire, ecostate.
Perigonia lateral on lower part of stem, perigonial leaves ovate, abruptly and shortly acuminate, margin entire, ecostate.
Perigonia lateral on lower part of stem, below perichaetia in autoicous species, perigonial leaves ovate to ovate-oblong, abruptly and shortly acuminate or apiculate, margin entire, ecostate.
In Eriophorum, the many ribbon-shaped perianth parts develop from a massive perigonial primordium.
which may represent either stamens or perigonial bristles....