Plantlet The Blogging Platform of Department of Botany, University of Dhaka
Gymnosperms are vascular plants that reproduces by means of an exposed seed, or ovule—unlike angiosperms, or flowering plants, whose seeds are enclosed by mature ovaries, or fruits. The seeds of many gymnosperms (literally “naked seeds”) are borne in cones and are not visible until maturity.
So far Taxonomists have recognized 88 genera and more than 1,000 species of Gymnosperms distributed throughout the world.
In our country, Gymnosperms grow both Naturally and Artificially. In this article, Gymnosperms of Bangladesh will be enlisted and described briefly.
Gymnosperms that are found in Bangladesh are of Two types:
- Gymnosperms grow in wild (Naturally)
- Gymnosperms grown under Cultivation/Gardens
Gymnosperms grow in Wild (Naturally)
There are Six species of Gymnosperms that grow Naturally in Bangladesh. These are as follows:
1. Cycas pectinata
It is a palm like tree.
Found in hills of Chittagong, CHT and sal forests of northern Mymensingh.
English name: Nepal Cycas.
Family: Cycadaceae.
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2. Pinus insularis
It is a small to medium sized tree.
Found in Khasia and Jainta hills and hills of
Chittagong.
English name: Khasia pine.
Family: Pinaceae.
3. Gnetum montanum (= G. scandens)
An evergreen climber/ scandent shrub.
Found in Sylhet and Chottagong.
English namd: Climbing Gnetum.
Family: Gnetaceae.
4. Gnetum oblongum
It is mainly Scandent shrub.
Found in Chittagong, Cox’s Bazar and
Sylhet.
English name: Oblong seeded Gnetum.
Family: Gnetaceae.
5. Gnetum latifolium var. funiculare (= Gnetum funiculare)
It is a large scandent shrub.
Found in Chittagong and Chittagong Hill
Tracts.
English name: Broad-leaved Gnetum.
Family: Gnetaceae.
6. Podocarpus neriifolius
It is a Small to medium-sized tree.
Found in Chittagong Hill Tracts and Sylhet.
English name: Oleander Podocarpus.
Family: Podocarpaceae.
(B) Gymnosperms grown under Cultivation/ Gardens
| No. | Species | Family |
|---|---|---|
| 1. | Cycas circinalis | Cycadaceae |
| 2. | Cycas revoluta | Cycadaceae |
| 3. | Pinus longifolia | Pinaceae |
| 4. | Pinus carribeana | Pinaceae |
| 5. | Thuja orientalis | Cupressaceae |
| 6. | Araucaria sp | Araucariaceae |
Reference:
Class Lecture of Dr. M. Oliur Rahman,
Department of Botany, University of Dhaka.
