the green thing on the bridge column

[alpacinou]

I'm trying to describe what I see in this photo:



What do I call those green things? Moss?

Do these work?

1. He stood on the riverbank, taking in his surroundings. He stared at the moss-coated bridge columns, looked up at parapet and the flow of cars on the bridge, and his gaze finally settled on Big Ben.

2. He sat on the riverbank, processing his surroundings. His gaze moved from the moss-draped bridge columns, up to the battered bridge parapet and the flow of cars on the bridge, and finally settled on Big Ben.

 

[Rover_KE]

The green [STRIKE]thing[/STRIKE] stuff/growth might be moss, but it's more likely to be lichen (pronounced liken).

 

[Tarheel]

I'm trying to describe what I see in this photo:

View attachment 4173

What do I call those green things? Moss?

Do these work?

1. He stood on the riverbank, taking in his surroundings. He stared at the moss-coated bridge columns, looked up at the parapet and the flow of cars on the bridge, and his gaze finally settled on Big Ben.

2. He sat on the riverbank, processing his surroundings. His gaze moved from the moss-draped bridge columns, up to the battered bridge parapet and the flow of cars on the bridge, and finally settled on Big Ben.

OK.

 

[tedmc]

I would call the green growth moss too. It thrives on damp surfaces especially in tropical climate and is unsightly.

I would say "it stained/soiled (not draped) the walls".

The barrier on top of the bridge is not exactly a parapet, which is a solid wall, but a decorative balustrade, which has voids.

The arched masonry bridge is not supported on columns (tall, slender leg-like structures) but concrete plinths.