The lily family, Liliaceae, consists of about 15 genera and 610 species of flowering plants within the order Liliales. They are monocotyledonous, perennial, herbaceous, often bulbous geophytes. Plants in this family have evolved with a fair amount of morphological diversity despite genetic similarity. Common characteristics include large flowers with parts arranged in threes: with six colored or patterned petaloid tepals arranged in two whorls, six stamens and a superior ovary. The leaves are linear in shape, with their veins usually arranged parallel to the edges, single and arranged alternating on the stem, or in a rosette at the base. Most species are grown from bulbs, although some have rhizomes. First described in 1789, the lily family became a paraphyletic "catch-all" (wastebasket) group of lilioid monocots that did not fit into other families and included a great number of genera now included in other families and in some cases in other orders. Consequently, many sources and descriptions labelled "Liliaceae" deal with the broader sense of the family.

लिलिएसी कुल (Liliaceae) के एकबीजपत्री पादप (monocotybdon) प्राय: विश्वव्यापी हैं। इस कुल के पौधे अधिकतर शाकीय होते हैं, जो अपने संयुताक्ष प्रकंद, अथवा बल्व का प्रकंद द्वारा चिर जीवित रहते हैं। थोड़े से पौधे क्षुप, या छोटे वृक्ष रूप में भी होते हैं, जैसे युका (Yucca), ड्रासिना (Dracaena) आदि। इनमें उत्तक वृद्धि भी होती है। अनेक पौधे मरुद्भिदी, धीकुँवार (Aloe) सदृश कुछ मांसल या सरस, चौपचीनी या स्माइलेक्स (Smilax) तथा ग्लोरिओसा (Gloriosa) सदृश्‌, कुछ आरोही और रसकस (Ruscus) एवं शतावरी (Asparagus) सदृश्‌, कुछ पर्णाभस्तंभ (phylloclade) युक्त होते हैं। इस कुल के २०० वंश तथा २०० स्पीशीज ज्ञात हैं।