Answer: mosses

AnswerCrossword Clue
MOSSES

Tree-trunk growths

MOSSES

They're popular in Japanese gardening

MOSSES

Peat bog plants

MOSSES
Plants in damp, dark areas
MOSSES
Some Everglades flora
MOSSESBog plants
MOSSESTree growths
MOSSESFlowerless plants
MOSSESSeedless flora
MOSSESPeat .. (gardener's purchases)
MOSSESTree trunk growths
MOSSESNonflowering plants
MOSSESPlants.
MOSSES"... from an Old Manse."
MOSSESPlants growing in velvety clusters.
MOSSESGarden growths.
MOSSESRelatives of Portulaca, Sedum, etc.
MOSSESVelvety plants.
MOSSESRock garden plants.
MOSSESBryologist's concern.
MOSSESGround greenery.
MOSSESRock garden features.
MOSSES"... from an Old Manse"
MOSSESHawthorne's "... from an Old Manse"
MOSSESFoxfeet and sphagnum
MOSSESBryologists' study
MOSSESThey may cover rocks
MOSSESBryophytic growths
MOSSESThey tend to grow on the north side of trees
MOSSESBark-covering plants
MOSSESThey grow on trees, sometimes
MOSSESBryologists' studies
MOSSESShaded growths
MOSSESBog growths
MOSSESSome rock coverings