Another distinctive feature in Selaginella is the presence of an unusual structure on the adaxial side of a leaf; this is the ligule, a peculiar tonguelike outgrowth from the leaf surface near the leaf base. "
4. feckless - ineffective
"If you think you can help out, why not donate something to the Feckless Goblin and help make it a happy little green and pointy nosed thing."
Being formerly common as an affected garnish of polite conversation, forsoothcame to be regarded as noting a ladies' man, and was occasionally used, allusively, as a noun or a verb."
8. ruga - tissue fold
One descendant of "ruga" that you'll probably recognize is "corrugate," which initially meant "to form or shape into wrinkles or folds."