There are two types of Spanish adjectives: four-form adjectives whose base form ends in "o" and agree in gender and number, and two-form adjectives whose base form ends in "e", a consonant, or "ista" and agree in number only. Exceptions include adjectives of nationality and those ending in "ón", "án", "ín", or "(d)or" which are four-form despite ending in consonants. Adjectives are generally placed after nouns when providing descriptive information.