Cellulose was a carbohydrate that formed the primary building matter of plants. Cabbages, psyllium, green beans, and celery were some vegetables known to contain high amounts of cellulose. (VOY: "Deadlock")
Some cellulose remained in the soil on Melona IV after the Crystalline Entity had devastated the planet in 2368. Kila Marr included these additional readings after Geordi La Forge reported that all the data she'd provided earlier had been entered into the USS Enterprise-D's computers. (TNG: "Silicon Avatar")
When Neelix was having trouble with a replicator in the mess hall in 2372, he noted to Samantha Wildman that it was having trouble replicating anything with a high level of cellulose, creating food that was yellower in appearance than normal. (VOY: "Deadlock")