Nice Start Up Sir On Sat, Dec 3, 2011 at 6:15 PM, Gurcharan Singh <singh...@gmail.com> wrote: > Fabaceae Lindley Bean or Pea family > (=Leguminosae A. L. de Jussieu) > > Subfamily Caesalpinioideae DC. > B & H, Takhtajan, Thorne, APG III and APweb as Caesalpinioideae > Cronquist and Dahlgren as family Caesalpiniaceae. > > Approx.150 genera, 2,700 species > Distributed mainly in tropics and subtropics, a few species in the temperate > regions. > > Salient features: Trees, shrubs or herbs, leaves usually pinnate compound > with pulvinate base, flowers zygomorphic corolla not papilionaceous, > posterior petal innermost, sepals free, odd sepal anterior, stamens 10, > usually free, in two whorls , ovary superior, carpel 1, fruit a pod. > > Major genera: Chamaecrisia (260 species), Bauhinia (250), Senna (250), > Caesalpinia (120) and Cassia (30). > > Description: Trees (Delonix), shrubs or herbs, rarely woody climbers > (Pterolobium, Bauhinia). Leaves alternate, pinnately or palmately compound, > sometimes simple (Bauhinia), leaf base (sometimes also the base of leaflets) > pulvinate, stipules present. Inflorescence racemose, in racemes or spikes > (Dimorphandra). Flowers bracteate (bracts usually caducous) bisexual, > zygomorphic, perigynous. Calyx with 5 sepals, rarely 4 (Amherstia), free or > rarely connate (Bauhinia), odd sepal anterior. Corolla with 5 petals, rarely > 3 (Amherstia), 1 (Pahuda) or even absent (Tamarindus), free, not > papilionaceous, posterior petal innermost. Androecium with 10 stamens, > sometimes lesser (3 in Tamarindus), rarely more, free, sometimes unequal in > size (Cassia), anthers bithecous, dehiscence longitudinal or by apical > pores. Gynoecium with a single carpel, unilocular with many ovules, > placentation marginal, ovary superior, style single, curved. Fruit a legume > or pod, rarely a lomentum; seeds 1-many, seed coat hard, endosperm minute or > absent, food reserves in cotyledons. > > Economic importance: The Subfamily includes several ornamentals such as > pride of Barbados (Caesalpinia pulcherrima), paulo verde (Parkinsonia), red > bud (cercis canadensis), Gul-mohar (Delonix regia), and several species of > Cassia and Senna. Many species of Senna are cultivated for leaves that > yield drug senna. The heartwood of Haematoxylon campechianum (logwood) > yields the dye hematoxylin. > > > Please feel free to share photographs of your collection of this group > during the week. Also resurface any unidentified members and upload those > meant for fresh identification/confirmation. > > The mails should have subject line "Fabaceae-Caesalpinioidea > (Caesalpiniaceae) Week:.................." > > > > -- > Dr. Gurcharan Singh > Retired Associate Professor > SGTB Khalsa College, University of Delhi, Delhi-110007 > Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018. > Phone: 011-25518297 Mob: 9810359089 > http://people.du.ac.in/~singhg45/ >
-- Regards Dr Balkar Singh Head, Deptt. of Botany and Biotechnology Arya P G College, Panipat Haryana-132103 09416262964
