Английская Википедия:Allocasuarina hystricosa
Шаблон:Short description Шаблон:Speciesbox
Allocasuarina hystricosa is a species of flowering plant in the family Casuarinaceae and is endemic to the south of Western Australia. It is a dioecious shrub with more or less erect branchlets, the leaves reduced to scales in whorls of ten to twelve, the fruiting cones Шаблон:Cvt long containing winged seeds (samaras) Шаблон:Cvt long.
Description
Allocasuarina hystricosa is a dioecious shrub that typically grows to a height of up to Шаблон:Cvt. Its branchlets are more or less erect, up to Шаблон:Cvt long and slightly scaly, the leaves reduced to erect, scale-like teeth Шаблон:Cvt long, arranged in whorls of ten to twelve around the branchlets. The sections of branchlet between the leaf whorls (the "articles") are mostly Шаблон:Cvt long and Шаблон:Cvt wide. Male flowers are arranged in sessile spikes Шаблон:Cvt long on older branchlets, the anthers Шаблон:Cvt long. Female cones are sessile and usually oblong to elliptic in outline, Шаблон:Cvt long and Шаблон:Cvt wide when mature. Male flowers have been observed in February and female flowers in February, April, June and December, and the samaras are reddish-brown to brownish-black and Шаблон:Cvt long. This sheoak is similar to A. scleroclada, but that species has drooping branchlets and slightly longer articles and teeth.[1][2]
Taxonomy
Allocasuarina hystericosa was first formally described in 2007 by Juliet Wege in the journal Nuytsia from specimens collected east of Ravensthorpe in 2007.[1][3] The specific epithet, (anfractuosa) means "sinuous", referring to the branchlets.[1] The specific epithet (hystricosa) means prickly or thorny, with reference to the spiny protuberances on the cones.[1]
Distribution and habitat
The species grows in mallee shrubland or heath, in association with Acacia ophiolithica, Hakea verrucosa and Allocasuarina campestris. It also forms small dense stands, sometimes with Melaleuca pauperiflora and Gahnia lanigera. It occurs on plains, slopes and hilltops in small populations between Bendalup Hill and the Eyre Range north-east of Ravensthorpe in the Esperance Plains bioregion of southern Western Australia.[1][2]
Conservation status
Allocasuarina hystricosa is listed as "Priority Four" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions,[2] meaning that it is rare or near threatened.[4]
References
- Английская Википедия
- Allocasuarina
- Endemic flora of Southwest Australia
- Plants described in 2007
- Rosids of Western Australia
- Fagales of Australia
- Dioecious plants
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