(i) Ornamentals : Some of the gymnosperms are grown in the gardens in different parts of the world e.g., Cycas revoluta, Ginkgo biloba, Auraucaria cookii, A. bidwilli, Biota orientalis, Cupressus sp., Juniperus sp., Thuja sp., Taxus baccata, Cryptomeria japonica etc.
(ii) Wood : Several plants of this group yield useful timber. The wood of Cedrus deodara is used for making railway sleepers. It is also used as a structural timber and making bridges. The wood of Callitris verrucosa, Pinus roxburghii, P. wallichiana, P. pinaster, P. lambertiana etc. is used for making furniture. Juniperus virginiana wood is used for making pencils. The gymnosperm Agathis australis is perhaps the largest timber producing tree of the world. Soft wood of many gymnosperms is used for making toys.
(iii) Resins : Several conifers yield resin which is obtained by tapping. By distilling the oleoresin obtained from pines. The resins are of three types namely hard resins, oleoresins and gum-resins. Several hard resins are obtained from living and fossil conifers which are as under :
(a) Copals : Kauri copal is obtained from Agathis australis and manila copal from Agathis alba.
(b) Amber : It is obtained from the fossil conifer Pinites succinifera.
(c) Sondarac : This pale-yellow resin comes from Callitris quadrivalis and Tetraclinis articulata. The turpentines are oleoresin which are also contributed by conifers. An important source of turpentine is Pinus australis, P. ponderosa and P. caribeae. Besides, some of the following products of turpentine nature are also obtained from conifers :
Canada balsam : It is obtained from Abies balsamaea.
Spruce gum : It is obtained from Picea rubens.
Bordeaux turpentine : It is obtained from Pinus pinaster.
Venetian turpentine : It is obtained from Larix decidua.
(iv) Essential oils : They are obtained from several plants. These oils are used mainly in perfumery, soap industry etc. The important oil yielding plants are Tsuga canadensis, Picea glauca, Abies siberica and Cedrus deodera. The oil obtained from Juniperus virginiana (cedar wood oil) is also used in microscopic work.
(v) Paper industry : The wood of several gymnosperms, particularly those of conifers is used in paper industry e.g., Abies pindrow, Picea smithiana, Cryptomeria japonica, Pinus roxburghii, Tsuga canadensis etc.
(vi) Edible : The seeds of Pinus geradiana (chilgosa) and P. roxburghii are edible. Sago is obtained from Cycas revoluta. The seeds of Cycas sp. are ground and used in the preparation of many edible products.
(vii) Medicinal use : Species of Ephedra yield an alkaloid called ephedrine. It is used in the preparation of medicines for the treatment of cough, asthma and bronchitis.
(i) Ornamentals : Some of the gymnosperms are grown in the gardens in different parts of the world e.g., Cycas revoluta, Ginkgo biloba, Auraucaria cookii, A. bidwilli, Biota orientalis, Cupressus sp., Juniperus sp., Thuja sp., Taxus baccata, Cryptomeria japonica etc.
(ii) Wood : Several plants of this group yield useful timber. The wood of Cedrus deodara is used for making railway sleepers. It is also used as a structural timber and making bridges. The wood of Callitris verrucosa, Pinus roxburghii, P. wallichiana, P. pinaster, P. lambertiana etc. is used for making furniture. Juniperus virginiana wood is used for making pencils. The gymnosperm Agathis australis is perhaps the largest timber producing tree of the world. Soft wood of many gymnosperms is used for making toys.
(iii) Resins : Several conifers yield resin which is obtained by tapping. By distilling the oleoresin obtained from pines. The resins are of three types namely hard resins, oleoresins and gum-resins. Several hard resins are obtained from living and fossil conifers which are as under :
(a) Copals : Kauri copal is obtained from Agathis australis and manila copal from Agathis alba.
(b) Amber : It is obtained from the fossil conifer Pinites succinifera.
(c) Sondarac : This pale-yellow resin comes from Callitris quadrivalis and Tetraclinis articulata. The turpentines are oleoresin which are also contributed by conifers. An important source of turpentine is Pinus australis, P. ponderosa and P. caribeae. Besides, some of the following products of turpentine nature are also obtained from conifers :
Canada balsam : It is obtained from Abies balsamaea.
Spruce gum : It is obtained from Picea rubens.
Bordeaux turpentine : It is obtained from Pinus pinaster.
Venetian turpentine : It is obtained from Larix decidua.
(iv) Essential oils : They are obtained from several plants. These oils are used mainly in perfumery, soap industry etc. The important oil yielding plants are Tsuga canadensis, Picea glauca, Abies siberica and Cedrus deodera. The oil obtained from Juniperus virginiana (cedar wood oil) is also used in microscopic work.
(v) Paper industry : The wood of several gymnosperms, particularly those of conifers is used in paper industry e.g., Abies pindrow, Picea smithiana, Cryptomeria japonica, Pinus roxburghii, Tsuga canadensis etc.
(vi) Edible : The seeds of Pinus geradiana (chilgosa) and P. roxburghii are edible. Sago is obtained from Cycas revoluta. The seeds of Cycas sp. are ground and used in the preparation of many edible products.
(vii) Medicinal use : Species of Ephedra yield an alkaloid called ephedrine. It is used in the preparation of medicines for the treatment of cough, asthma and bronchitis.