structure of a moss
stalk 
Long slender axis that supports the capsule, enabling it to absorb nutrients.
capsule 
Hollow structure that manufactures spores, small seeds used in reproduction; it has a cover that opens to release the mature spores.
rhizoid 
Rootlike filament enabling the moss to anchor itself to its substrate and absorb water and mineral salts.
stem 
Main part of the moss from which the leaves spiral outward; it can be upright or flat.
leaf 
Part of the moss originating at the stem, especially adapted to capture light, perform photosynthesis and absorb water.