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  Annona muricata
  Citation:  Annona muricata L., Sp. Pl. 536. 1753; Manilal & Sivar., Fl. Calicut 27. 1982; Antony, Syst. Stud. Fl. Kottayam Dist. 59. 1989; Babu, Fl. Malappuram Dist. 3. 1990; Debika Mitra in B. D. Sharma et al., Fl. India 1: 206. 1993; Sivar. & Mathew, Fl. Nilambur 45. 1997; M. Mohanan in P. Daniel, Fl. Kerala 1: 136. 2005; Sunil & Sivadasan, Fl. Alappuzha Dist. 72. 2009; Ratheesh Narayanan, Fl. Stud. Wayanad Dist. 103. 2009.
  Malayalam Name(s): Cancer chakka, Mullanjakka, Mulluathi, Mullathi
  Tamil name(s):
  English name(s): Soursop, Guanabana, Graviola, Prickly Custard Apple
  Description: Trees, to 10 m high, bark pale brown; young twigs glabrescent. Leaves simple, alternate, distichous, estipulate; petiole 4-8 mm long, slender, glabrous, grooved above; lamina 7-14.5 x 3-5.5 cm, elliptic, oblong, obovate, oblong-obovate, elliptic-oblong or elliptic-obovate, base acute, apex acute to acuminate, coriaceous, margin entire, lateral veins 8-10 pairs, slender, pinnate, prominent, intercostae reticulate, domatia present. Flowers yellowish-green, solitary, axillary or from mature branches; sepals 3, triangular, persistent; petals 6(3+3) ovate-acute, yellow, thick, glabrous, outer ones 2.5-3.5 x 2-2.5 cm, base cordate, apex acuminate, inner petals ca. 1.5 x 1 cm, shortly stipitate; stamens many, 4-5 mm long, linear, filaments broad at base, with capitate top of the connective; ovary superior, ca. 4 mm long, linear, slightly curved, strigose, style broad at base, stigma entire. Fruit ovoid to obovoid, 15-25 x 10-15 cm, green, covered with curved spines, stalks 2-3 cm long, stout; seeds many, reddish-brown, ca. 1.5 cm long.
  Habit: Tree
  Flowering & Fruiting: April-October
  District(s): All Districts
  Medicinal: Yes
  Habitat: Cultivated
  Distribution: Native of Central America and West Indies, introduced elsewhere
  Aquatic: No
  Epiphyte(s): No
  Saprophyte: No
  Stem parasite: No
  Root parasite: No
  Flower colour(s): Creamy
  Weed: No
  Monocot/Dicot: Dicotyledonous Plants
  Exotic: Yes
  Garden: No
  Edible: Yes
  Vegetable: No
  Endemic to:
  IUCN status:
  Localities: Kayamkulam
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