Answer: MOSS

AnswerCrossword Clue
MOSSProverbial ground cover
MOSSLow-growing greenery
MOSSPlaywright Hart
MOSSShady growth
MOSSTree trunk greenery
MOSSMatted growth
MOSSWhat rolling stones don't gather
MOSSForest-floor plant
MOSSTree trunk growth
MOSSCommon tundra vegetation
MOSSForest floor growth
MOSSSome spores, all grown up
MOSSRolling stone's lack, proverbially
MOSSPlant that can grow on trees
MOSSSphagnum or peat
MOSSGreen growth
MOSSIt doesn't gather on rolling stones
MOSSMoor growth
MOSSTerrarium greenery
MOSSKate on the runway
mosssmall, leafy-stemmed plant growing on rocks, moist ground, etc.
MOSSLycopodium, e.g.
MOSSDamp growth
MOSSSpanish or Irish
MOSSWhat certain stones don't gather
MOSSYou won't find it on a rolling stone
MOSSShade of green
MOSSIt grows on trees
MOSSPrimitive vegetation
MOSSBryophyte
MOSSSign of stagnation
MOSSIceland or club
MOSSBryologist's topic
MOSSRolling stone's lack
MOSSTree-trunk growth
MOSSWelcome growth in Japanese gardens
MOSSTrunk attachment
MOSSForest growth
MOSSWet ground growth
MOSSTrunk growth