Eucalyptus incerata       0

Author: Murray Ian Hill Brooker (1934-2016) & Stephen Donald Hopper (1951-)
Family: Myrtaceae Subfamily: Myrtoideae Tribe: Eucalypteae
Genus: Eucalyptus Subgenus: Symphyomyrtus Section: Bisectae Subsection: Glandulosae Serie: Erectae Subserie: Abundae
English name: Mount day mallee
Zone: Australia

Description
It is a mallee endemic to Western Australia, restricted to the Mt Day area between Hyden and Norseman. The epithet of this species is from the Latin inceratus, meaning covered with wax.
Eucalyptus incerata Observed in Australia by Dean Nicolle (license)
Botanical Description
It is a mallee to 5m tall. It forms a lignotuber. The bark is smooth throughout, light grey-brown over orange. The branchlets are glaucous. The oil glands are present in the pith.

Juvenile leaves are not seen. The adult leaves are thick, alternate, petioles 0.5-1.7cm long. The blade is lanceolate, 5-10.5cm long, 1-3.2cm wide, base tapering to petiole, margin entire, apex pointed, concolorous, glaucous at first but maturing glossy, green, surface appearing "glazed". The side-veins are acute or obscure, reticulation not visible, intramarginal vein present or obscure, oil glands numerous.

The inflorescence is axillary unbranched, pendulous, peduncles flattened, 1.5-3.5cm long. There are 7 buds per umbel, pedicellate (pedicels 0.7-1.2cm long). The mature buds are elongated, 2.2-3.5cm long, 0.6-0.9cm wide (asymmetrically fusiform), glaucous, scar present (outer operculum shed early), operculum bluntly horn-shaped, circa 2-2.5 times the length of the hypanthium. The stamens are erect, anthers oblong, versatile, dorsifixed, dehiscing by longitudinal slits. The style is long and straight, stigma rounded, 4 locules, the placentae each with 4 vertical rows of ovules. The flowers are yellow.

The fruit is down-turned, pedicellate (pedicels 0.6-0.9cm long), stoutly barrel-shaped to cupular, 1-1.5cm long, 0.9-1.8cm wide, disc descending, obscured by persistent staminophore, 4 valves, held at rim level. The seeds are dark brown, 0.7-2mm long, ovoid to flattened-ovoid, dorsal surface shallowly reticulate, hilum ventral.

E. incerata differs from E. eremophila in having a lignotuber, i.e. it is a mallee, not a mallet, and in having heavily glaucous branchlets, buds and fruit, and in its restricted distribution. The non-glaucous E. eremophila occur to the east of the southern wheatbelt and is the only species in the group to extend into desert areas. Two mallee species, the non-glaucous E. tenera and the slightly waxy E. tephroclada have very similar slender buds and fruit that are generally smaller than found in typical E. eremophila and E. incerata. The only difference between E. tenera, which is widespread in the southern and central wheatbelt, and E. tephroclada, more restricted to the Hyden-Southern Cross area, is the presence of white wax on branchlets, buds and fruit of the latter.
Member of
The Genus: Eucalyptus Subgenus: Symphyomyrtus Section: Bisectae Subsection: Glandulosae Serie: Erectae Subserie: Abundae having the following characters: The buds have an operculum scar, cotyledons are bisected and branchlets have oil glands in the pith. Within this subsection Eucalyptus incerata belongs to a small subgroup of three species, series Erectae subseries Annulatae having smooth bark, buds with long operculum, erect stamens, adult leaves with numerous oil glands obscuring the sideveins and reticulation, and seed with fissured seedcoat.

References
- Eucalypts of Australia. Eucalyptus incerata
- Field guide to Eucalypts, M. I. H. Brooker & D. A. Kleinig. 2006 Vol. 2 pag. 116. ISBN
- Taxonomy of species deriving from the publication of Eucalyptus subseries Cornutae (Myrtaceae), Brooker, M. I. H. (Murray Ian Hill), and Hopper, S D. Nuytsia 2002 Vol. 14(2) pag. 325-360. Address
References for the genus
- 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
General specifications
Biological type: tree
Frost resistance: 14ºF
Leaf color: dark green
Flower color: yellow
No transplantation: Yes
Reproduction mode: hermaphrodite plant whoes flowers produce both male and female gametes
IUCN Red List of threatened species status: Least Concern

Specifications for the Mediterranean basin
Adult size (h x w): 29,5ft x 13,1ft
Sun exposure: full sun (Sun hours: >6h
Foliage: evergreen
Growth: fast
Flowering time from April until April

Specific information for our garden
Planting substrate: 30%Compost+30%Coco+40%Sand
Plant watering: 1x a week pH 6.5
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: 200-400mm
Sowing instructions
SPRING Select the largest and most fleshy BROWN seeds. Sow the seeds at 2mm depth in the Well Drained Seed Sowing Mix between 64-72°F. During germination keep the substrate moist and in daylight. The seeds germinate in 3-14 weeks. The viability of the seeds, kept under good conditions, is 10 years.
The average seed weight is 1694,9 per gram (0,00059g).

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

Experiences in the garden
14-02-19A Obtaining seeds from seed provider Nindethana Seeds collected in 'Nindethana Seeds11>Lake Hurlstone Nature Reserve'. (Wild origin)
03-03-20 Send a batch to nursery Railhet.
05-03-20 Sown 60 seeds in a seed plate F, they did not geminate in Serre3.
Protocol: Spring 2mm Sowing mix+Sand 59-68°F Damp substrate+Light 3-6w
10-03-21 Sown 30 seeds in a seed plate F and germinated at 17-06-21 but the seedlings did not survive in Serre3.
Protocol: Spring Brown Seed 2mm Sowing mix+Sand 59-68°F Damp substrate+Light 3-6w
17-03-22 Sown 30 seeds in a seed plate F, they did not geminate in Serre3.
Protocol: Spring Brown Seed 2mm Sowing mix+Sand 59-68°F Damp substrate+Light 3w