Allocasuarina torulosaAllocasuarina torulosa, commonly known as forest oak, rose sheoak, river oak or Baker's oak, is a species of flowering plant in the family Casuarinaceae and is endemic to eastern Australia. It is a slender, usually dioecious tree that has drooping branchlets up to 140 mm (5.5 in) long, the leaves reduced to scales in whorls of four or five, and the fruiting cones 15–33 mm (0.6–1 in) long containing winged seeds (samaras) 7–10 mm (0.3–0.4 in) long.
CasuarinaCasuarina, also known as she-oak, Australian pine and native pine, is a genus of flowering plants in the family Casuarinaceae, and is native to Australia, the Indian subcontinent, Southeast Asia, islands of the western Pacific Ocean, and eastern Africa.Lawrence Alexander Sidney JohnsonLawrence Alexander Sidney Johnson (26 June 1925 – 1 August 1997) known as Lawrie Johnson, was an Australian taxonomic botanist. He worked at the Royal Botanic Gardens, Sydney, for the whole of his professional career, as a botanist (1948–1972), Director (1972–1985) and Honorary Research Associate (1986–1997). The standard author abbreviation L.A.S.Johnson is used to indicate this person as the author when citing a botanical name.
Whorl (botany)In botany, a whorl or verticil is a whorled arrangement of leaves, sepals, petals, stamens, or carpels that radiate from a single point and surround or wrap around the stem or stalk. A leaf whorl consists of at least three elements; a pair of opposite leaves is not called a whorl. For leaves to grow in whorls is fairly rare except in plant species with very short internodes. Genera with species having whorled leaves include Galium, Nerium, Elodea, and Lilium.
CasuarinaceaeThe Casuarinaceae are a family of dicotyledonousflowering plants placed in the order Fagales, consisting of four genera and 91 species of trees and shrubs native to eastern Africa, Australia, Southeast Asia, Malesia, Papuasia, and the Pacific Islands. At one time, all species were placed in the genus Casuarina.
BractIn botany, a bract is a modified or specialized leaf, associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves in size, color, shape or texture. They also look different from the parts of the flower, such as the petals or sepals. A plant having bracts is referred to as bracteate or bracteolate, while one that lacks them is referred to as ebracteate or ebracteolate.
William AitonWilliam Aiton (1731 – 2 February 1793) was a Scottish botanist. Aiton was born near Hamilton. Having been regularly trained to the profession of a gardener, he travelled to London in 1754, and became assistant to Philip Miller, then superintendent of the Chelsea Physic Garden. In 1759 he was appointed director of the newly established botanical garden at Kew, where he remained until his death.
Type (biology)In biology, a type is a particular specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally associated. In other words, a type is an example that serves to anchor or centralizes the defining features of that particular taxon. In older usage (pre-1900 in botany), a type was a taxon rather than a specimen.
Samara (fruit)A samara (, UK also:) is a winged achene, a type of fruit in which a flattened wing of fibrous, papery tissue develops from the ovary wall. A samara is a simpledry fruit, and is indehiscent (not opening along a seam). The shape of a samara enables the wind to carry the seed farther away from the tree than regular seeds would go, and is thus a form of anemochory.
Plant reproductive morphologyPlant reproductive morphology is the study of the physical form and structure (the morphology) of those parts of plants directly or indirectly concerned with sexual reproduction. Among all living organisms, flowers, which are the reproductive structures of flowering plants (angiosperms), are the most varied physically and show a correspondingly great diversity in methods of reproduction.
MonoecyMonoecy (from Ancient Greek (monoikía)'one household'; adj. monoecious), is a sexual system in seed plants where separate male and female cones or flowers are present on the same plant. It is a monomorphic sexual system comparable with gynomonoecy, andromonoecy and trimonoecy, and contrasted with dioecy where individual plants produce cones or flowers of only one sex, and with bisexual or hermaphroditic plants in which male and female gametes are produced in the same flower.
DioecyDioecy (from Ancient Greek (dioikía)'two households'; adj. dioecious) is a characteristic of species that have distinct unisexual individuals, each producing either male or female gametes, either directly (in animals) or indirectly (in seed plants). Dioecious reproduction is biparental reproduction. Dioecy has costs, since only the females directly produce offspring.*As an Amazon Associate I earn from qualifying purchases.