| Eucalyptus exigua | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Myrtales |
| Family: | Myrtaceae |
| Genus: | Eucalyptus |
| Species: | E. exigua |
| Binomial name | |
| Eucalyptus exigua | |
Eucalyptus exigua is a species of mallee that is endemic to Western Australia. It has smooth, whitish bark, linear to narrow lance-shaped adult leaves, flower buds in groups of between seven and eleven, white flowers and short barrel-shaped to conical fruit.
Eucalyptus exigua is a mallee that typically grows to a height of 2–5 m (6 ft 7 in–16 ft 5 in) and forms a lignotuber. It has smooth, white to grey bark on the trunk and branches. Young plants and coppice regrowth have petiolate, narrow elliptical to lance-shaped leaves that are 35–60 mm (1.4–2.4 in) long and 7–15 mm (0.28–0.59 in) wide. Adult leaves are arranged alternately, linear to narrow lance-shaped, the same dull to glossy green colour on both sides, 40–90 mm (1.6–3.5 in) long and 5–13 mm (0.20–0.51 in) wide on a petiole 5–17 mm (0.20–0.67 in) long. The flower buds are arranged in leaf axils in groups of seven, nine or eleven on an unbranched peduncle 5–15 mm (0.20–0.59 in) long, the individual buds on a thick pedicel 3–5 mm (0.12–0.20 in) long. Mature buds are more or less cylindrical, 6–7 mm (0.24–0.28 in) long and 4–5 mm (0.16–0.20 in) wide with a flattened operculum with a short point in the centre. Flowering occurs in March and the flowers are white. The fruit is a woody, shortly barrel-shaped to conical capsule 5–7 mm (0.20–0.28 in) long and 5–8 mm (0.20–0.31 in) wide with and a descending disc and four valves at rim level. The brown seeds within have a flattened ovoid shape and are 0.5–1.5 mm (0.020–0.059 in) long. [2] [3] [4]
Eucalyptus exigua was first formally described in 1993 by the botanists Ian Brooker and Stephen Hopper in the journal Nuytsia from a specimen collected by Brooker near the road between Hyden and Norseman. [4] [5] The specific epithet (exigua) is from the Latin word exiguus meaning "small" or "feeble", referring to the habit of this species compared to the similar Eucalyptus brachycorys . [4]
Eucalyptus exigua is part of the subgenus Symphyomyrtus section Dumaria in a sub-group of nine closely related species called series Ovulares. The smooth-barked members of this series include E. exigua, E. cyclostoma , E. cylindrocarpa and E. oraria and rough-barked members include E. ovularis , E. aequioperta , E. brachycorys , E. myriadena and E. baudiniana . [6]
This mallee is found on sandplains mainly east of Hyden in the Wheatbelt and Goldfields-Esperance regions of Western Australia, where it grows in sandy loamy soils. [3] [4]
This eucalypt is classified as "Priority Three" by the Western Australian Government Department of Parks and Wildlife [3] meaning that it is poorly known and known from only a few locations but is not under imminent threat. [7]
Eucalyptus zopherophloia, commonly known as the blackbutt mallee, is a species of spreading mallee that is endemic to an area on the west coast of Western Australia. It has rough bark over part or all of the trunk, smooth grey bark above, narrow lance-shaped leaves, flower buds in groups of nine or eleven, creamy white flowers and conical fruit.
Eucalyptus aquilina, commonly known as the Mount Le Grand mallee, is a mallee that is endemic to a small area in the south-west of Western Australia. It has smooth white and grey bark, lance-shaped, often curved leaves, top-shaped or diamond-shaped flower buds, white to cream-coloured flowers and cone-shaped fruit on a down-curved peduncle.
Eucalyptus baudiniana is a tree, rarely a mallee, that is endemic to Western Australia. It has rough bark on its trunk, smooth brownish bark above, narrow lance-shaped to curved adult leaves, oval buds in groups of seven to fifteen, white flowers and barrel-shaped fruit.
Eucalyptus capillosa, commonly known as wheatbelt wandoo, or mallee wandoo, is a species of tree or mallee that is endemic to Western Australia. It has smooth, grey bark, lance-shaped to elliptic adult leaves, spindle-shaped flower buds in groups of nine to thirteen, white flowers and barrel-shaped to cylindrical fruit.
Eucalyptus histophylla is a species of mallee or small tree that is endemic to southern Western Australia. It has smooth bark, often with ribbons of shed bark, linear to narrow lance-shaped adult leaves, flower buds arranged in groups in leaf axils, white flowers and cylindrical to barrel-shaped or conical fruit.
Eucalyptus incerata, commonly known as Mount Day mallee, is a species of mallee that is endemic to southern Western Australia. It has smooth bark, lance-shaped adult leaves, flower buds with a long, horn-shaped operculum and arranged in groups of seven, yellow flowers and barrel-shaped to cup-shaped fruit.
Eucalyptus latens, commonly known as narrow-leaved red mallee, is a species of mallee that is endemic to the south-west of Western Australia. It has smooth grey and coppery bark, linear to narrow lance-shaped adult leaves, flower buds in groups of seven to eleven or more, creamy white flowers and small barrel-shaped to shortened spherical fruit.
Eucalyptus ligulata, commonly known as Lucky Bay mallee, is a mallee that is native to a few small areas along the south coast of Western Australia. It has smooth bark on the trunk and branches, narrow lance-shaped leaves, flower buds in groups of between nine and thirteen, creamy white flowers and cup-shaped or barrel-shaped fruit with shallow ribs on the sides.
Eucalyptus litorea, commonly known as saline mallee, is a species of mallee that is endemic to a small area on the southern coast of Western Australia. It has hard, rough grey bark on the trunk, smooth grey bark above, lance-shaped adult leaves, flower buds in groups of seven, white flowers and cylindrical or barrel-shaped fruit.
Eucalyptus luteola is a species of mallee that is endemic to a small area of Western Australia. It has smooth grey bark with rough greyish ribbons near the base, linear to narrow lance-shaped adult leaves, flower buds in groups of eleven to thirteen, lemon-coloured flowers and cylindrical to barrel-shaped fruit.
Eucalyptus myriadena, also known as blackbutt, is a species of mallee or tree that is native to Western Australia. It has rough, coarse flaky bark on part of the trunk, smooth bark above, linear to narrow lance-shaped adult leaves, flower buds in groups of between nine and thirteen, white flowers and narrow cylindrical to barrel-shaped fruit. It is widely distributed in the wheatbelt and goldfield areas of the state.
Eucalyptus olivina is a species of mallee or a tree that is endemic to Western Australia. It has smooth greyish bark, linear to narrow lance-shaped adult leaves, flower buds in groups of seven or nine, creamy white flowers and short barrel-shaped to cup-shaped fruit.
Eucalyptus phaenophylla, also known as common southern mallee, is a species of mallee that is endemic to Western Australia. It has smooth bark, linear to narrow lance-shaped or narrow elliptical adult leaves, flower buds in groups of up to thirteen, pale lemon-coloured flowers and barrel-shaped, cylindrical or conical fruit.
Eucalyptus polita is a species of mallet or small tree that is endemic to the southwest of Western Australia. It has smooth, greyish bark, narrow lance-shaped adult leaves, flower buds in groups of between seven and eleven, white flowers and cup-shaped fruit.
Eucalyptus subangusta is a species of tree, mallee or mallet that is endemic to the southwest of Western Australia. It has smooth bark, narrow lance-shaped leaves, flower buds in groups of up to nineteen, white flowers and cup-shaped to barrel-shaped fruit.
Eucalyptus aequioperta, commonly known as the Welcome Hill gum, is a mallee, sometimes a tree and is endemic to Western Australia. It has rough bark on the lower half of the trunk, lance-shaped leaves, flower buds in groups of between seven and fifteen, white flowers and more or less cup-shaped fruit.
Eucalyptus cerasiformis, commonly known as the cherry-fruited mallee, is a mallee that is endemic to a small area of Western Australia. It has smooth, pale grey, sometimes powdery bark, lance-shaped adult leaves, flower buds in groups of seven, pale yellow or whitish flowers and cylindrical or bell-shaped fruit.
Eucalyptus densa is a species of mallee or mallet that is endemic to Western Australia. It has smooth greyish bark that is shed in curly strips, linear to narrow lance-shaped adult leaves, long, spindle-shaped flower buds in groups of seven or nine, pale yellow or lemon-coloured flowers and conical, cylindrical or barrel-shaped fruit.
Eucalyptus diminuta, commonly known as the spring mallee, is a species of mallee that is endemic to south-west of Western Australia. It has smooth, silvery to greyish bark, sometimes with rough flaky bark near the base, lance-shaped adult leaves, pendulous, elongated flower buds arranged in groups of seven, creamy white flowers and cup-shaped to bell-shaped fruit.
Eucalyptus rowleyi is a species of mallee that is endemic to the Pilbara region of Western Australia. It has smooth grey bark, lance-shaped adult leaves, flower buds in groups of seven or nine, white flowers and cylindrical to urn-shaped fruit.
