Eucalyptus is a large genus with so many species often difficult to separate, but here are tips to separate them
E. citriodora are rather distinct from others in strongly scented (more like odomos) leaves when crushed, flower buds almost as long as broad, cap pinkish, hemispherical and cup like with sunkun disc.
E. camaldulensis has similar shaped flower buds but light brown and not pinkish cap which is distinctly pointed, fruit has 4-5 slightly raised teeth in the center.
E. microtheca has narrow leaves forming dense drooping canopy, buds very small usually less than 5 mm long, pointed at tip, fruits barely 3-4 mm long with 3-3 spreading teeth longer than base.
E. tereticornis buds are longer, often up to 1.5 cm long, cap much longer than base and gradually tapered, fruit with 4-5 teeth, projecting upwards almost as long as base.
E. globulus has usually single large flower, fruit more than 20 mm across
E. polyanthemos is very distinct in its almost rounded leaves, flowers in panicles and hemispherical cap
E. leucoxylon with usually 3-flowered clusters, on up to 12 mm long peduncles, conical cap, as long as base, fruit 10-12 mm across.
Species with description & pictures in Flowers of India as on 19.4.14:
ABSTRACT : Eucalypt has come to stay in India. Large scale plantations have been raised in government owned and private farm lands; the planting is continuing. There is vast potential to grow the species economically on farm and waste land in suitable zones. Eucalypt meets requirements of people and industries and has helped to reduce pressure on natural forests. The uses of eucalypt are varied; people are realising this fast. The economical, social and ecological aspects of the species are receiving proper attention to understand its impact and to avoid indisriminate planting. The present studies are not conclusive, particularly in ecological aspects; further studies are indicated. Growth is varied; clonal selection, propagation and planting will improve uniform production. Government intervention in marketing is necessary to safeguard the interest of farmers.
Plantations raised in some of the important States
Andhra Pradesh: The main species raised is Eucalyptus hybrid, other species are E. camaldulensis and E. tereticornis.
Bihar: The species planted is E. hybrid;
Haryana: Eucalyptus hybrid, E. citriodora, and E. crebra were introduced in Haryana State during the forties.
Kerala: Over 38,000 ha of plantations of Eucalyptus grandis were raised by the Forest Department in grass lands in high rainfall ranges
since 1958. Most of these plantations died due to pink disease. The effort of planting of Eucalyptus tereticornis at lower elevations for supply of
pulpwood did not show much success.
Maharashtra: The main species raised are E. hybrid and E. camaldulensis in the dry zone. In high rainfall areas Eucalyptus grandis followed by E. robusta and Eucalyptus saligna were found to be more suitable.
Punjab: Under the Social Forestry Schemes farmers were encouraged to grow Eucalyptus hybrid on boundaries of agricultural fields and on either
side of irrigation channels.
Tamil Nadu: Eucalyptus globulus plantations were raised in Nilgiri and Kodaikanal hills in the past to meet the firewood needs. At medium
elevations Eucalyptus hybrid was raised.
Uttar Pradesh: Large scale planting of Eucalyptus hybrid was started in U.P. in 1962 in the Terai region with mechanisation practices.
Karnataka: Eucalyptus hybrid is also one of the species in over 443,000 ha of miscellaneous plantations raised. In addition, the Forest Plantation Corporation has raised 48,000 ha of Eucalyptus hybrid plantations.
Comparison of various eucalyptus species for their morphological, chemical, pulp. : Indian Journal of Chemical Technology. Vol. 18, March 2011, pp. 145-151. :
Eucalyptus euryphylla (L.A.S.Johnson ex G.J.Leach) Brookeris a synonym of Angophora euryphylla (L.A.S.Johnson ex G.J.Leach) L.A.S.Johnson & K.D.Hill
Eucalyptus: Enduring Myths, Stunning Realities By S.A. Abbasi (2004)- Details
An Excursion Flora of Central Tamilnadu, India By K. M. Matthew (1995)- Details with keys–
Eucalyptus polycarpa F.Muell.is a synonym of Corymbia polycarpa (F.Muell.) K.D.Hill & L.A.S.Johnson
Eucalyptus torelliana = Corymbia torelliana (F. Muell.) K. D. Hill & L. A. S. Johnson
CRC World Dictionary of Medicinal and Poisonous Plants: Common Names … By Umberto Quattrocchi (2012)- Detilas- p. 1653-
Eucalyptus & Corymbia : 1 post by 1 author.
Attempts have been made to incorporate most of the species available in India & nearby areas with details & keys directly or through links as far as possible. It’s quite possible that there may be some discrepancy in the accepted names & synonyms taken from other links.
Species discussed so far in efloraofindia are given at the bottom of the page in the form of links against Subpages. On clicking them one can see all the details.
If someone can provide complete list of species found in India with source references it will be wonderful.
Any comments/ corrections are welcome.
Eucalyptus (Myrtaceae) page with images of species in efloraofindia : 2 posts by 1 author.
If you find any incorrect identification, pl. let us know. If anybody can send images of other species of this genera (for incorporation in the website), if any, or can identify unidentified images, it will be really nice.