Eucalyptus johnstonii       0

It is a tree to 50m tall. It forms a lignotuber. The bark is smooth throughout or with some persistent, fibrous, grey bark on base of trunk. The smooth bark is yellow to orange-brown or greenish. The stem is square in cross-section and prominently winged, warty.

The juvenile leaves are opposite and sessile to subsessile for many pairs, orbicular to ovate, 2.5-6cm long, 1.3-4.5cm wide, margin usually crenulate, base tapering to rounded, apex rounded at first then pointed on later leaves, glossy, green. The adult leaves are alternate, petiole 1.5-3cm long. The blade is broadly lanceolate to lanceolate to falcate, 6.5-15cm long, 2-4cm wide, flat or undulate, base tapering to petiole, margin entire or subcrenulate, concolorous or slightly discolorous, glossy, green, side-veins greater than 45° to midrib, densely to very densely reticulate, intramarginal vein well removed from margin, oil glands island or intersectional.

The inflorescence is axillary unbranched, peduncles stout, 0.3-1cm long. There are 3 buds per umbel, sessile (rarely with 0.2cm pedicels). The mature buds are oblong to ovoid to diamond-shaped to obovoid, 0.8-1.1cm long, 0.6-0.9cm wide, green or red-green, usually slightly warty, angled longitudinally, scar present, operculum rounded to flattened and umbonate or beaked. The stamens are mostly inflexed, anthers cuboid to oblong, versatile, dorsifixed, dehiscing by longitudinal slits (non-confluent). The style is long, stigma blunt, 3 or 4 locules, the placentae each with 4 vertical ovule rows. The flowers are white.

The fruit is sessile, obconical, hemispherical or campanulate, 0.7-1cm long, 0.9-1.3cm wide, often angled longitudinally, disc raised-convex or level, or slightly descending, 3 or 4 valves, strongly exserted. The seeds are dark brown or black, 1.5-3mm long, ovoid or flattened-ovoid, dorsal surface smooth, hilum ventral.

It is closely related to E. vernicosa and E. subcrenulata. It is considered by some botanists as a lowland form of E. vernicosa.

The Genus: Eucalyptus Subgenus: Symphyomyrtus Section: Maidenaria Subsection: Euryote Serie: Semiunicolores having the following characters: A large group of species more or less restricted to south-eastern Australia, characterised by bilobed cotyledons, simple axillary inflorescences, buds with two opercula, stamens with versatile anthers and flattened seeds with a ventral hilum. Within this section, Eucalyptus johnstonii with four other species, forms series Semiunicolores having smooth bark, subcrenulate and strongly glandular juvenile leaves opposite for many nodes, a crown of green, densely and finely reticulate adult leaves, buds in threes, and small fruit with relatively prominent valves.

The pale pinkish brown timber is used for joinery and associated products, and for poles and pit props in mines. The flowers provide moderate nectar and pollen yields. It has an attractive trunk and bark and, frequently, a compact pyramidal form. Useful in cool temperate regions for broad landscape planting, such as parks, roadsides, large gardens and farms.

References
- Encyclopedia of Australian Plants, Elliot W. Rodger & Jones David L. 2012 Vol. 4 pag. 120. ISBN
- Eucalypts of Australia. Eucalyptus johnstonii
- Forest Trees of Australia, D.J Boland, M.I.H Brooker, G.M Chippendale, N. Hall, B.P.M Hyland, R.D Johnston, D.A Kleinig, M.W McDonal and J.D Turner. 2019 pag. 420-421. ISBN

- Encyclopedia of Australian Plants, Elliot W. Rodger & Jones David L. 2012. ISBN
- Seeds of woody plants in the United States, Schopmeyer Clifford Scharff and others. 1974 pag. 384-392. Address
- A general history of the dichlamydeous plants, comprising complete descriptions of the different orders, Don, George. 1831 Vol. 2. Address
- A new classification of sections and series in Eucalyptus subg. Eudesmia (Myrtaceae), Bayly, Michael and Mclay, Todd and Cantrill, David and Fowler, Rachael. Muelleria: An Australian Journal of Botany 2023 Vol. 41 pag. 50-54. DOI
- A new series, Incognitae, of Eucalyptus L'Her., including a new species endemic to Fleurieu Peninsula and Kangaroo Island, South Australia, Nicolle, D. Journal of the Adelaide Botanic Garden 1995 pag. 73-78. JStor
- A new species and a new combination in the shining peppermint group of Eucalyptus and notes on the distribution of Eucalyptus willisii sens. strict, Rule, K. Muelleria: An Australian Journal of Botany 2008 Vol. 26. DOI
- A revision of the Yellow Bloodwoods (Myrtaceae: Eucalyptus ser. Naviculares Maiden), Brooker, M.I.H and Bean, Tony. Austrobaileya 1991 Vol. 3 pag. 409-437. DOI
- A taxonomic revision of Eucalyptus wandoo, E. redunca and allied species (Eucalyptus series Levispermae Maiden - Myrtaceae) in Western Australia, Brooker, M. I. H. (Murray Ian Hill), and Hopper, Stephen D. Nuytsia 1991 Vol. 8 pag. 1-189. Address
- Eucalyptus revelata, a rare new species related to E. mooreana (Myrtaceae) from the Kimberley region of Western Australia, Nicolle, Dean and Barrett, Russell L and others. Nuytsia 2018 Vol. 29 pag. 109-118. Address
- Eucalyptus wimmerensis revisited and notes on the morphologies and taxonomies of five Victorian mallee-boxes, Rule, K. Muelleria: An Australian Journal of Botany 2018 Vol. 37 pag. 39-64. DOI
- Five new endemic eucalypts for Victoria, Rule, K. Muelleria 2012 Vol. 30 pag. 83-105. DOI
- Four new species of Eucalyptus, S. T. Blake. Austrobaileya 1977 Vol. 1(1) pag. 1-9. JStor
- Four new species of ironbark (Eucalyptus L'Herit., Myrtaceae) from southern Queensland, Bean, Tony and M.I.H.Brooker,. Austrobaileya 1994 Vol. 4 pag. 187-194.
- Multivariate analysis of morphological variation in Eucalyptus series Psathyroxyla Blakely (Myrtaceae): taxonomic implications, Pfeil, BE and Henwood, MJ. Telopea 2004 Vol. 10(3) pag. 711-724. Address
- New subspecies in Eucalyptus caesia and in E. crucis (Myrtaceae) of Western Australia, Brooker, M. I. H. (Murray Ian Hill), and Hopper, S D. Nuytsia 1982 Vol. 4 pag. 113-128. Address
- New taxa and combinations in Eucalyptus and Angophora (Myrtaceae), Johnson, Lawrence and Hill, Kenneth. Telopea 1990 Vol. 4 pag. 37-108. DOI
- New taxa in Eucalyptus (Myrtaceae) for Victoria and notes on Victorian populations of Eucalyptus calycogona, Rule, K. Muelleria 2004 Vol. 20 pag. 9-32. DOI
- New taxa of Eucalyptus informal subgenus Symphyomyrtus (Myrtaceae), endemic to South Australia, Nicolle, Dean. Journal of the Adelaide Botanic Garden 2000 pag. 83-94. JStor
- Notes on Eucalyptus ser. Psathyroxyla Blakely (Myrtaceae) and other 'Ash group' eucalypts, Bean, Tony. Austrobaileya 1997 Vol. 5 pag. 125-135. DOI
- Notes on the narrow-leaved Ironbarks (Myrtaceae: Eucalyptus subseries Subglaucae), Bean, Tony. Austrobaileya 2005 Vol. 7 pag. 111-120. DOI
- Resolution of a 35-year taxonomic dilemma: Eucalyptus sp. Howes Swamp Creek (Myrtaceae) from eastern Wollemi National Park, New South Wales, Bell, Stephen and Phillips, Gavin and Nicolle, Dean. Telopea 2022 Vol. 25 pag. 151-163. DOI
- Six new infraspecific taxa in Eucalyptus (Myrtaceae) for Victoria, Rule, K. Muelleria 2011 Vol. 29 pag. 3-15. DOI
- Systematic studies in the eucalypts — 3 New taxa and combinations in Eucalyptus (Myrtaceae), Hill, Kenneth & Johnson, L. A. S. Telopea 1991 Vol. 4(2) pag. 223-267. Address
- Systematic studies in the eucalypts — 4 New taxa in Eucalyptus (Myrtaceae), K.D. Hill & L-A.S. Johnson. Telopea 1991 Vol. 4(2) pag. 312-349. Address
- Systematic studies in the Eucalypts 5. new taxa and combination in eucalyptus myrtaceae in western australia, Hill, K.D.; Johnson, L.A.S. Telopea 1992 Vol. 4(4) pag. 561-634. Address
- Systematic studies in the eucalypts. 10. New tropical and subtropical eucalypts from Australia and New Guinea (Eucalyptus, Myrtaceae), Hill, KD and Johnson, LAS. Telopea 2000 Vol. 8(4) pag. 503-539. Address
- Systematic studies in the eucalypts. 6. A revision of the coolibahs, Eucalyptus subgenus; Symphyomyrtus section; Adnataria series; Oliganthae subseries; Microthecosae (Myrtaceae), Hill, KD and Johnson, LAS. Telopea 1994 Vol. 5(4) pag. 743-771. Address
- Systematic studies in the eucalypts. 8. A review of the eudesmioid eucalypts, Eucalyptus subgenus Eudesmia (Myrtaceae), Hill, KD and Johnson, LAS. Telopea 1998 Vol. 7(4) pag. 375-414. Address
- Systematic studies in the Eucalypts. 9. A review of series Sociales (Eucalyptus subgenus Symphyomyrtus, Section Bisectaria, Myrtaceae), Hill, K.D. and Johnson, L.A.S. Telopea 1999 Vol. 8 (2) pag. 165-218. Address
- Taxonomic and nomenclatural notes on the Eastern grey boxes (Eucalyptus ser. Moluccanae Chippendale, Myrtaceae) and the reinstatement of Eucalyptus woollsiana R.T.Baker, Bean, Tony. Austrobaileya 2009 Vol. 8 pag. 25-34. DOI
- The Ironbarks Allied to Eucalyptus crebra F. Muell. and the Description of a New Species, E. quadricostata, in the Group, Brooker, M. Austrobaileya 1985 Vol. 2 pag. 148-152. DOI
- Three new Victorian species related to Eucalyptus aromaphloia L.D. Pryor and J.H. Willis and notes on the polymorphic nature of that species, Rule, K. Muelleria: An Australian Journal of Botany 1996 Vol. 9 pag. 133-143. DOI
- Two new mallee Eucalypts (Myrtaceae) from Gippsland, Victoria, Rule, K. and Molyneux, W.M. Muelleria 2011 Vol. 29 pag. 16-26. DOI
- Two new subspecific taxa within the Eucalyptus Series Argyrophyllae for Victoria, Rule, Kevin and Walsh, Neville. Muelleria: An Australian Journal of Botany 2017 Vol. 36 pag. 81-91. DOI
- Typification of some names in Eucalyptus (Myrtaceae), Part 1, Bean, Tony. Telopea 2009 Vol. 12 pag. 309-319. DOI
- Typification of some names in Eucalyptus (Myrtaceae), Part 2, Bean, Tony. Telopea 2010 Vol. 12 pag. 469-477. ResearchGate
- Typification of some names in Eucalyptus (Myrtaceae), Part 3, Bean, Tony. Telopea 2010 Vol. 12 pag. 511-520. ResearchGate
- Hommes et Plantes. Vol. 58 pag. 34-41. Address
- PlantÆxoticA. 2015 Vol. 28 pag. 18-26. Address
- PlantÆxoticA. 2015 Vol. 21 pag. 4-19. Address
- PlantÆxoticA. 2015 Vol. 11 pag. 7-11. Address
- Vegetative propagation of Eucalyptus through cuttings, Banthia K. M., Joshi C. M., Venkata Reddy P. B. & Sinha J. P. Indian Pulp & Paper Technical Association 1988 Vol. 25(1) pag. 37-40. Address

Biological type: tree
Frost resistance: 10ºF
Leaf color: dark green
Flower color: white
No transplantation: Yes
Reproduction mode: hermaphrodite plant whoes flowers produce both male and female gametes
IUCN Red List of threatened species status: Near Threatened

Specifications for the Mediterranean basin
Adult size (h x w): 98,4ft x 49,2ft
Sun exposure: full sun (Sun hours: >6h
Foliage: evergreen
Growth: fast
Flowering time from August until October

Specific information for our garden
Planting substrate: 30%Compost+30%Coco+40%Sand
Plant watering: 3x a week pH 5.5
Logical sequence of containers for: Eucalyptus; forestry plate, forestry pot 3L, Airpot 12L, Airpot 50L, Airpot 800L
Propagation is done by cuttings

Ecology in its country of origin
Rainfall: 600-1200mm
Clay soil: much
Sandy soil: much
Acidic soil: much
Draining soil: much
Ornemental: much

AUTUMN Select the largest and most fleshy BLACK seeds. Keep in refrigerator at 39°F for 4 weeks in dry condition. Sow the seeds at 2mm depth in the Well Drained Seed Sowing Mix between 68-77°F. During germination keep the substrate moist and in daylight. The seeds germinate in 3-27 weeks. The viability of the seeds, kept under good conditions, is 10 years.
The average seed weight is 247,5 per gram (0,00404g).

Germination references
- Seeds: Ecology, Biogeography, and, Evolution of Dormancy and Germination, Baskin, Carol & Baskin, J.M. 2014 pag. 1-1586. DOI


Germination references for the genus
- Seeds of woody plants in the United States, Schopmeyer Clifford Scharff and others. 1974 pag. 384-392. Address
- Eucalypt seed and sowing. Native Forest Silviculture Technical Bulletin 2010 Vol. 1. Address
- USDA Forest Service's Woody Plant Seed Manual, John K. Francis and Craig D.Whitesell. 2008. Address