Family mimosaceae | Mimosa or Acacia Family | economic importance | class 11 скачать в хорошем качестве

Family mimosaceae | Mimosa or Acacia Family | economic importance | class 11

Aslam o alikum I am Hassam ur Rahman and I am teaching Fsc biology since 2014 .I am always trying to improve myself and provide best lecture to students.i am taking content for the lecture from authentic and relevant sources but human errors are possible . you are requested to please highlight the mistakes.My lectures are equally reliable for Fsc and mdcat students #visiblescience #mdcatbiology #alevelbiology #neetbiology #fscbiology This lecture is about MIMOSACEAE: Mimosa or Acacia Family : A family of about 56 genera and about 2800 species. In Pakistan it is represented by 11 genera and 49 species, of these only 4 genera and 18 species are native and rest are introduced. Familiar Plants: Acacia nilotica , Albizzia lebbek, Mimosa pudica Touch me not, Prosopis glandulosa, P. cineraria. Vegetative Characters : Habit: Mostly trees or shrubs, rarely climbers or herbs. Most of them are xerophytes. Stem: Mostly woody. Leaves: Pinnate by compound, alternate, stipulate, stipules modiied into thorns. Floral Characters : Inlorescence: Spike like or head or umbel, rarely racemose or globose umbels. Flowers: Bisexual, Actinomorphic, hypogynous to slightly perigynous, bracteate. Calyx: Usually sepals 5, generally fused, toothed or lobed. Corolla: petals 5, free or fused; corolla lobed. Androecium: Stamens 5 to numerous, free, or adnate to the base of corolla. Gynoecium: A simple pistil of 1 carpel, ovary unilocular, superior; ovules many, placentation marginal. Fruit: A legume dehiscent or indehiscent. Economic Importance : Many trees of this family including species of Acacia, Albizzia and Xylia provide commercially important wood, which is used for construction purpose or for furniture or as a fuel. The wood of Albizzia lebbek is used in cabinet work, and railway carriages. Arabic gum is obtained from Acacia nilotica and A. Senegal. Katha a dye is obtained from Acacia catechu. The tender leaves of Accacia nilotica are used as blood puriier. Some common garden plants grown for their beautiful lowers are Mimosa pudica and Acacia melanoxylon. A few species of Prosopis are planted in the arid zones for breaking the wind pressure