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  Sida spinosa
 
  Family: MALVACEAE
  Citation:  Sida spinosa L., Sp. Pl. 683. 1753; Hook. f., Fl. Brit. India 1: 323. 1874; Gamble, Fl. Pres. Madras 89(64). 1915; T.K. Paul in B.D. Sharma & Sanjappa, Fl. India 3: 292. 1993; Subram., Fl. Thenmala Div. 32. 1995; Sivar. & Pradeep, Malvac. Southern Peninsular India 280. 1996; M. Mohanan & A.V.N. Rao in P. Daniel, Fl. Kerala 1: 395. 2005.
  Malayalam Name(s): Aanakurunthotti, Aanathuthi, Kattaventhiyam, Mayiramanikkam, Mayirmanikkam, Valiya-oorakam
  Tamil name(s):
  English name(s): Prickly sida, Prickly mallow
  Description: Annual or perennial, erect or diffuse herbs or undershrubs, to 60 cm high; stems with 1 or 2 spines at the base of petioles; stems, petioles and pedicels cinereous-stellate-and simple hairy. Leaves alternate, oblong or ovate, acute or subcordate at base, serrate at margin, acute, rounded to truncate at apex, 6-30 x 4-25 mm, stellate-pubescent, sometimes glabrescent above; petioles 2-15 mm long; stipules linear, equal, 1-2.5 mm long, hairy. Flowers axillary, solitary or in clusters of 2-5 on small axillary shoots; pedicels 2-8 mm long, accrescent to 8 mm, jointed above middle. Calyx campanulate, 3-5 mm across; lobes free above middle, deltoid, acute to acuminate with a prominent midnerve, 1-2 x 1.5-2 mm, cinerous-stellate-and simple hairy outside, glabrous except at margin inside. Corolla ca 1 cm across, yellow or yellowish white; petals obovate, rounded or emarginate at apex, ca 6 x 3 mm, glabrous. Staminal column ca 2 mm long, glabrous, antheriferous at apex. Ovary ovoid; styles 5; stigmas globose, purple. Schizocarps ca 5 mm across, enclosed in calyx; mericarps 5, 3-gonous, 2-3 mm long, with 2 divergent awns to 1-1.5 mm long, prominently dorsally reticulate, stellate-hairy at apex; seeds ovoid, slightly 3-gonous, 1-1.5 mm long, glabrous, brownish black.
  Habit: Shrub
  Flowering & Fruiting: March-December
  District(s): Kollam
  Medicinal:
  Habitat: Wastelands
  Distribution: Pantropical
  Aquatic: No
  Epiphyte(s): No
  Saprophyte: No
  Stem parasite: No
  Root parasite: No
  Flower colour(s): Yellow, White
  Weed: No
  Monocot/Dicot: Dicotyledonous Plants
  Exotic: No
  Garden: No
  Edible: No
  Vegetable: No
  Endemic to:
  IUCN status:
  Altitude:
  Localities: Vandalodu, Thenmalai
   
 
   
 
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