Eucalyptus rigidula, commonly known as Newman Rock Mallee, is a species of mallee eucalyptus native to Western Australia. This plant is characterized by its distinctive growth habit and resilience in arid environments. As a mallee, it typically grows as a multi-stemmed shrub or small tree, rarely exceeding 5 meters in height. Its significance lies in its adaptation to specific ecological niches and its role within its native flora. The physical characteristics of Eucalyptus rigidula are key to its identification. Its growth form is often spreading, with numerous erect stems arising from a lignotuber. The leaves are lanceolate to ovate, measuring approximately 5-10 cm in length and 1.5-3 cm in width. They are typically a dull green color, with a leathery texture, and possess a characteristic venation pattern. The bark is usually smooth and shedding in ribbons, revealing a pale underbark. During its flowering season, which can vary but is often in the warmer months, the plant produces creamy white flowers. These flowers are followed by woody, cup-shaped fruits, known as gumnuts, which are typically 0.8-1.2 cm in diameter and contain small seeds. Eucalyptus rigidula is found in the arid and semi-arid regions of Western Australia, particularly in the southwestern part of the state. Its natural habitat is often associated with rocky outcrops, lateritic soils, and sandy plains, where it thrives in well-drained conditions. It is well-adapted to the hot, dry summers and mild winters characteristic of this region. While it is not widely cultivated outside its native range, its drought tolerance and attractive form make it a potential candidate for xeriscaping and native plant gardens in suitable climates. Ecologically, Eucalyptus rigidula plays a role in its native ecosystem by providing habitat and food for local fauna. Its flowers attract pollinators, and its foliage can be a food source for various insects. The seeds are dispersed by wind and gravity. Interesting adaptations of this species include its ability to resprout from its lignotuber after fire or physical damage, a common survival strategy for mallee eucalypts in fire-prone landscapes. The specific adaptations to rocky habitats suggest a tolerance for nutrient-poor soils and potentially challenging moisture regimes. While not extensively documented for ornamental or economic uses, its presence contributes to the biodiversity of Western Australian flora.