-ad (-αδης, patronymic suffix), suffix for denoting an ecad.
adaptable, able to originate ecads; adaptation, the structural response to stimuli.
adjustment, the functional response to stimuli.
adventicious (adventicius, foreign), invading from distant formations.
adventive (adventivus, accidental), established temporarily.
aggregation, the coming together of plants into groups.
agi´um (ἀγή, beach), a beach formation; agad, a beach plant.
agri´um (ἀγρός, field), a culture formation; agrad, a cultivated plant.
aiphyti´um (ἀεί, permanent), an ultimate formation.
alsi´um (ἄλσος, grove), a grove formation; alsad, a grove plant.