moss

en-noun

moss (countable and uncountable, plural mosses)

From Middle English mos, from Old English mos (“bog, marsh, moss”), from Proto-West Germanic *mos (“marsh, moss”), from Proto-Germanic *musą (“marsh, moss”), from Proto-Indo-European *mews- (“moss”).
Cognate with Saterland Frisian Moas (“moss”), West Frisian moas (“moss”), Dutch mos (“moss”), German Low German Moss (“moss”), German Moos (which shows the same polysemy of "moss" and "bog, fen"), Danish mos (“moss”), Swedish mossa (“moss”), Icelandic mosi (“moss”), Latin muscus (“moss”), Russian мох (mox, “moss”), Polish mech. Doublet of mousse.

cypress moss

Hypnum cupressiforme; Lycopodium alpinum

flowering moss (Pyxidanthera barbulata; Portulaca grandiflora;

moss crop

Eriophorum vaginatum; Eriophorum polystachion; Argentina anserina, syn. Potentilla anserina; Eleocharis palustris, syn. Scirpus caespitosus

willow moss

Hypnaceae, possibly Taxiphyllum barbieri

Any of various small, green, seedless plants growing on the ground or on the surfaces of trees, stones, etc.; now specifically, a plant of the phylum Bryophyta (formerly division Musci).

(countable) A kind or species of such plants.


perianth

From French périanthe, from New Latin perianthium.

Archegonia are surrounded early in their development by the juvenile perianth, through the slender beak of which the elongated neck of the fertilized archegonium protrudes.

1992, Rudolf M[athias] Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, Chicago, Ill.: Field Museum of Natural History, →ISBN, page 5:

(botany, bryology) The sterile, tubelike tissue that surrounds the female reproductive structure in a leafy liverwort.


bryology

(botany) The study of bryophytes (non-vascular plants including mosses, liverworts and hornworts).


paroecious

From Ancient Greek πᾰ́ροικος (pắroikos, “dwelling beside”) + English -ious. By surface analysis, par(a)- + -oecious.

bor

parœcious (alternative)
paroicous (alternative)

(bryology) Having the male and female reproductive organs growing beside or near each other, as in certain cryptogams.


limbidium

The leaf margin, which consists of a band of uni-stratose to pluri-stratose, hyaline-yellowish, prosenchymatous, stereid cells is called limbidium. In some species, the limbidium can be well developed in all three laminae.

2020, Afroz Alam, Contemporary Research on Bryophytes, page 165:

(bryology) A differentiated margin of the leaf of a moss.