Diselma

Diselma archeri (dwarf pine ko Cheshunt pine) [1] wani nau'in tsiro ne na dangin Cupressaceae da kuma nau'in nau'in nau'in nau'in nau'in nau'i na Diselma. Tana da girma zuwa yankunan tsaunuka na Tasmania ta kudu maso yamma da tsaunuka ta tsakiya, a kan iyakar gabar tekun yamma da tafkin St. Clair. Halittar halitta ce ta monotypic wacce aka keɓe ga dajin ruwan sama mai tsayi da kuma ƙasa mai ɗanɗano. Rarraba shi yana da kusanci da na sauran conifers na Tasmania Microcachrys tetragona da Pherosphaera hookeriana.

 Bayyanawa da muhalli 
'Diselma archeri wani karami ne, shrub wanda yawanci ya kai 1-4 m a tsawo amma an rubuta shi don isa mafi tsawo a yankunan gandun daji na subalpine. Shafuka suna da launin toka-kore tare da rassan da ke juyawa zuwa ƙasa a matakai. Rassan suna da gajeren lokaci, suna da tsawo kuma suna da yawa. Fure-fure na Branchlet ya bayyana murabba'i a cikin ɓangaren giciye kuma ganyayyaki masu kama da sikelin (2-3 mm) suna haɗuwa kuma an shirya su a cikin nau'i-nau'i daban-daban waɗanda aka matse kusa da tushe. Tsarin murabba'in ganye yayi kama da na Microcachrys tetragona (Podocarpaceae) (mai tsalle-tsalle) kuma ana iya rikitar da nau'ikan biyu. Koyaya, M. tetragona yana rayuwa daidai da sunansa kuma yana girma ƙasa, yana yadawa tare da rassan da ke tsaye kawai. Wani nau'in da za'a iya rikitar da Diselma shine Phaerosphaera hookeriana (wanda aka fi sani da Microstrobos niphophilus) wanda ke cikin iyalin Podocarpaceae . Dukkanin wadannan nau'o'in suna da irin wannan al'ada da rarraba, duk da haka, nau'ikan ganye a kan D. Archeri sun sake sa ya bambanta shi daga sauran nau'ikan. Bark yana da tsayi kuma yana da gogewa kuma sau da yawa yana nuna launin ruwan kasa na ciki. Kasancewa gymnosperm babu furanni da aka samar, a maimakon haka ci gaban iri yana faruwa a saman ganyayyaki masu kama da sikelin waɗanda aka gyara don samar da ƙwayoyin cuta (duba hoton).  

Diselma archeri is a dioecious shrub, where male and female cones are located on separate individuals. Both types of cones are very small (3–4 mm) and occur at the branch tips. The female cone is composed of two pairs of opposite cone scales and only the upper pair of scales is fertile. At maturity up to four small winged seeds are produced which are wind dispersed. D. archeri seedlings are uncommon as the species often re-sprouts from roots and trunks buried in peat soils.

 Tarihin lissafi Diselma'': dis (ma'ana ninki biyu) da selma (ma'anar sama) ma'ana ce ga ko dai ma'auni biyu masu amfani a cikin mace ko kuma tsari na ganye masu yawa a cikin nau'i-nau'i masu canzawa. Archeri an sanya masa suna ne bayan mai tara kayan lambu William Archer (1820-1874) wanda kuma ya kasance Fellow na Linnaean Society, masanin gine-gine kuma memba na majalisar dokokin Deloraine, Tasmania .  Wannan nau'in an fi sani da dwarf pine dangane da tsarin girma ko Cheshunt pine wanda ke nuni da dukiyar William Archer, kodayake jinsin ba zai faru a can ba. 

 Rarraba 
'Diselma archeri ya zama ruwan dare a Tasmania kuma ana samunsa ne kawai a cikin ruwan sama mai yawa na alpine da subalpine na Kudu maso Yamma da Tsakiyar Tsakiya na jihar. Yankin tsaunuka ya bambanta daga kimanin 580-1400m sama da matakin teku. Kamar yawancin conifers na Tasmania D. Archeri yana da matukar damuwa da wuta kuma zai faru ne kawai a wuraren da ba su da wuta a cikin alpine coniferous heath da kuma gandun daji. Wannan nau'in na iya samar da karamin itace (3-4m) a cikin gandun daji mai rufewa a babban tsawo kuma wasu masu ilimin muhalli suna la'akari da Diselma a matsayin ɗaya daga cikin nau'ikan bakwai waɗanda za a iya amfani da su azaman alamun gandun daji a Tasmania. A cikin tsaunuka masu tsawo Dwarf Pine yana girma sosai kuma yana kaiwa kusan 1-2m a tsawo.

 Halitta 
Dangi mafi kusa da Diselma sun bayyana su ne nau'in Fitzroya na Kudancin Amurka, wani nau'in jinsin a cikin subfamily Callitroideae, Kudancin Hemisphere na Cupressaceae .  An rubuta burbushin Diselma da Fitzroya a Tasmania. Wannan shaidar ta nuna cewa Diselma archeri'' mai yiwuwa ne paleoendemic kuma shine nau'in karshe da ya rage a cikin jinsin da ya fi girma kuma ya nemi mafaka zuwa takamaiman yankunan alpine saboda canjin yanayi.

 Manazarta 

 Haɗin Na waje 

 Gidan yanar gizon Gymnosperm: Diselma archeri