Thanks Pankaj ji for very good Information
On Mon, Oct 21, 2013 at 7:03 PM, Pankaj Kumar <[email protected]>wrote: > Bulbophyllum is the largest genus in the orchid family Orchidaceae. > With more than 2,000 species, it is also one of the largest genera of > flowering plants, exceeded only by Astragalus. This genus is > abbreviated in the trade journals as Bulb. > > > Phylogeny > This genus was first described by Louis-Marie Aubert du Petit-Thouars > (botanical abbreviation Thouars) in his book Histoire particulière des > plantes orchidées recueillies sur les trois Iles Australes d’Afrique, > de France, de Bourbon et de Madagascar, describing 17 Bulbophyllum > species. There are now more than 2,800 records (accepted names and > synonyms) for this genus. This large number and the great variety of > its forms make the genus a considerable challenge for taxonomists: 120 > sections and subgenera have been listed. The scientific name has been > derived from the Latin word bulbus (bulb-like) and the Greek word > phyllon (leaf), referring to the pseudobulbs on top of which the leaf > is growing. > > The center of diversity of this genus is in the montane forests of > Papua New Guinea (more than 600 species) which seems to be the > evolutionary homeland, though the genus is pantropical and widespread, > occurring in Australia, Southeast Asia (with over 200 species in > Borneo), India, Madagascar (with 135 species, some endemic), Africa > and in tropical central and South America. > > Structure > The general characteristics for this genus are : single-noded > pseudobulbs, the basal inflorescence and the mobile lip. This genus > covers an incredible range of vegetative forms, from tall plants with > cane-like stems, to root climbers that wind or creep their way up tree > trunks. Other members are pendulous epiphytes (growing on other > plants), and quite a number that have developed succulent foliage to a > greater or lesser degree. Some species are lithophytic. One species > has almost become leafless and uses its pseudobulbs as the organs of > photosynthesis. > These orchids with a sympodial growth have rhizomatous stems with > often angled pseudobulbs. The thin to leathery leaves are folded > lengthwise. > > Pollination > Many Bulbophyllum species have the typical odor of rotting carcasses, > and the flies they attract assist in their reproduction through > pollination. > > The erect to pendent inflorescence arises laterally from the base of > the pseudobulb. The flower form has a basic structural blueprint that > serves to identify this genus. But this form can be very diverse : > compound or single, with few to many flowers, with the resupinate > flowers arranged spirally or in two vertical ranks. The sepals and the > petals can also be very varied : straight or turned down, without > footstalk or with a long claw at the base. They are often hairy or > callous. There are two to four hard and waxy pollinia with stipes > present or absent. The fruits are beakless capsules. > > SOURCE: WIKIPEDIA ! > > -- > *********************************************************** > Pankaj Kumar, Ph.D. > IUCN-SSC Orchid Specialist Group Asia > > Office: > Conservation Officer > Orchid Conservation Section > Flora Conservation Department > Kadoorie Farm and Botanic Garden (KFBG) Corporation > Lam Kam Road, Tai Po, New Territories, Hong Kong. > Residence: > 151, 1st Floor, Tai Om Tsuen > Lam Tsuen, Tai Po, New Territories, Hong Kong. > > email: [email protected]; [email protected] > Phone: +852 2483 7128 (office - 8:30am to 5:00pm); +852 9436 6251 > (mobile). Fax: +852 2483 7194 > > -- > You received this message because you are subscribed to the Google Groups > "efloraofindia" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/indiantreepix. > For more options, visit https://groups.google.com/groups/opt_out. > -- Regards Dr Balkar Singh Head, Deptt. of Botany and Biotechnology & Horticulture Incharge Arya P G College, Panipat Haryana-132103 09416262964 -- You received this message because you are subscribed to the Google Groups "efloraofindia" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/indiantreepix. For more options, visit https://groups.google.com/groups/opt_out.
