S: (n) cryptogam (formerly recognized taxonomic group including all flowerless and seedless plants that reproduce by means of spores: ferns, mosses, algae, fungi)
S: (n) annual ((botany) a plant that completes its entire life cycle within the space of a year)
S: (n) biennial ((botany) a plant having a life cycle that normally takes two seasons from germination to death to complete; flowering biennials usually bloom and fruit in the second season)
S: (n) perennial ((botany) a plant lasting for three seasons or more)
S: (n) escape (a plant originally cultivated but now growing wild)