3 ENGLISH 
liverworts; e.g., Marchantia [f671, g716, s203]. 
725 oil droplet — any minute spherule of oil within the cell cytoplasm; not associated with an 
organelle (cf. oil body) [1673, g717, 573]. 
726 oligoporous — with few pores [f674, g? m "P 
727 oligotrophic — poor in minerals; to eutrophic) [f675, g694, 719, s806]. 
728 olivaceous — olive-green [f676, g720, $807] 
729 opaque — not transparent or translucent [f680, g1035, s810]. 
730 operculum (pl. opercula) — the lid covering the mouth of most moss capsules; usually 
separated from the mouth by an annulus to open the capsule (see stegocarpic) [f681, 
g198, s811]. 
us evcelw: - pm circular [f682, 103 s812]. 
g [f1097, g721, 5158]. 
733 orifice - pening through whicl spores escape from the capsule; mouth of capsule [f684, 
g548, s813]. 
734 orophilous — thriving in mountainous regions [f685, g722, s814]. 
735 orthostichous — in a vertical row; i.e., leaves of Phyllogonium [f686, 704, g723, s815]. 
736 ostiole -- a pore-like opening; e.g., the aperture through which spermatozoids are released 
from the antheridium in some thalloid liverworts [f687, g690, s816]. 
737 outer peristome -- see exostome [(731, g25, s86 
738 outer peristomial layer — the outer most layer of the peristomial cylinder that contributes 
to the formation of arthrodontous peristomes (see inner and primary peristomial layers) 
[f241, g26, s167]. 
739 outer spore sac — the layer of cells immediately outside the archesporium; innermost layer 
of the amphithecium, continuous above with the inner peristomal layer [f936, g27, s1026]. 
740 oval — widely elliptical [f688, g724, s818]. 
741 ovate — outline of an egg with base broader than apex [f689, g247, s78, 817]. 
742 ovoid — an egg-shaped solid [f690, g247, 819]. 
3 sca, — female gamete or egg, situated in the venter of the archegonium [f679, g265, s809, 
]. 
744 oxylophyte — a plant of humus rich (acid) habitats [[691, g725, s821]. 
74S IN 1 WE xc m 
thick 1 [f1098, g209, s829]. 
7 
46 pachydermous -— thick-skinn jspplid to exceptionally thick-walled cells of moss 
capsules and [f692, g211 
- pachyphyllous — thick-leaved | sum 2209, 210, s831]. 
vui ccn in groups of two; e.g., peristome teeth, Fabronia; magringal teeth on 
ta of Rhizogonium spiniforme [£71, 447, 727, s79]. 
braces — with finger-like lobes radiating from center [f695, g444, $822]. 
udicolous —- growing we marshy places [f696, g728, s8. 
pendurihrm shaped like the body of a violin; obov ded dM 
Wide (s us pitt ate with a median, roun 
es 
