| 词条 | Ptaeroxylon |
| 释义 |
| name = Sneeze-wood | image = Ptaeroxylon obliquum, habitus, Walter Sisulu NBT.jpg | regnum = Plantae | unranked_divisio = Angiosperms | unranked_classis = Eudicots | unranked_ordo = Rosids | ordo = Sapindales | familia = Rutaceae | subfamilia = Spathelioideae | genus = Ptaeroxylon | species = P. obliquum | binomial = Ptaeroxylon obliquum | binomial_authority = (Thunb.) Radlk. | synonyms = Ptaeroxylon utile Eckl. & Zeyh. }} Ptaeroxylon obliquum is the botanical name for the sneezewood tree. It is native to Southern Africa, including South Africa, Zimbabwe, and Mozambique. It is the only species in the genus Ptaeroxylon. BackgroundPtaeroxylon obliquum is a species from the Rutaceae family which are most abundant in South Africa and Australia.[1] The term ptaeroxylon is Greek for sneeze and wood,[2] while obliquum denotes the oblique shape of the leaflets. The wood produces oils containing nieshoutol, which causes violent sneeze attacks by workers who are exposed to the tree.[2] Though sneezewood is not poisonous, it has been known to cause respiratory complications. It has been linked to asthma, rhinitis and mucosal inflammation.[4]DescriptionPtaeroxylon obliquum is a shrub or medium deciduous tree that stands up to {{convert|15|m|ft}} tall.[5]The bark is whitish-grey and smooth when young, but fissured with age. Leaflets are 2.5 x 1.3 cm marked asymmetrically. They are blue-green to dark green in color and crowd near the ends of the rachis in three to seven pairs of leaflets. The flowers on the tree are white to creamy yellow and fragrant.[6] Sneezewood is very dense having a specific gravity of 1040 kg/m3 UsesLumberSneezewood is an extremely hard and durable timber wood. It often lasts longer than brass or iron when used for machine bearings.[5] In the past, sneezewood was used extensively for railway sleepers. It can also be used to make furniture. In Mozambique it is used to make xylophone keys.[2] Sneezewood is a very attractive wood with golden heartwood with light orange figures and is a favorite amongst woodturners. Its scarcity today is due in part of its past use as fuel for steam tugs.[2] It has been used extensively for fence and telegraph poles as well.[5] MedicinalSneezewood is used for medicinal and ritual purposes. The bark can be used to repel moths or as snuff. The resin has been used to get rid of warts and cattle ticks.[2] The Xhosa have traditionally made snuff from sneeze-wood to relieve headaches.[12] See also
References{{Commons category|Ptaeroxylon obliquum|Ptaeroxylon obliquum}} 8 : Spathelioideae|Monotypic Rutaceae genera|Flora of Southern Africa|Flora of South Africa|Flora of Zimbabwe|Flora of Mozambique|Trees of Africa|Wood |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。