- Scientific Name: Citrus × limon (L.) Osbeck
- Ref: Reise Ostindien:250. 1765
- Synonyms:
- Citrus × adami Risso
- C. × aurata Risso
- C. × bergamia (Risso) Risso & Poit.
- C. × bergamia var. parva Risso
- C. × bergamota Raf.
- C. × dimorphocarpa Lush.
- C. × limetta Risso
- C. × limetta subsp. murcica S.Ríos, D.Rivera, García Lidón & Obón
- C. × limettioides Yu.Tanaka
- C. × limodulcis D.Rivera, Obón & F.Méndez
- C. × limon var. pompia Camarda
- C. × limonelloides Hayata
- C. × limonia Osbeck
- C. × limonum Risso
- C. medica f. limon (L.) M.Hiroe
- C. medica var. limon L.
- C. × mellarosa Risso
- C. × mellarosa var. plena Risso
- C. × mellarosa var. vulgaris Risso
- C. × meyeri Yu.Tanaka
- C. × volcameriana (Risso & Poit.) Pasq.
- C. × vulgaris Ferrarius ex Mill.
- English Common Name: lemon
- Chinese Common Name: 柠檬 níngméng
- Japanese Common Name: レモン [檸檬] remon
- Family: Rutaceae
- Genus: Citrus
- Distribution: Cultivated and sometimes naturalized in S China.
- Photo: 11/18/2016, Hangzhou Botanical Garden, Zhejiang
Small trees. Branches ± spiny. Young leaves and flower buds reddish purple. Leaf blade ovate to elliptic, 8-14 × 4-6 cm, margin conspicuously crenulate, apex usually mucronate. Flowers solitary or several in fascicles. Flowers bisexual or male by ± complete abortion of pistil. Calyx cup-shaped; lobes 4 or 5. Petals 1.5-2 cm, outside purplish, inside white. Stamens 20-25 or more. Ovary subcylindric or barrel-shaped; stigma clavate. Fruit yellow, ellipsoid to ovoid, narrowed at both ends, surface usually coarse and lemon scented, apex usually with a mammilla; pericarp thick, difficult to remove; sarcocarp in 8-11 segments, pale yellow, acidic. Seeds ovoid, small, apex acute; seed coat smooth; embryo usually solitary but sometimes numerous; cotyledons milky white. Fl. Apr-May, fr. Sep-Nov. 2n = 18, 36. (Flora of China)
