Taxonomic studies on endemic species from Turkey: Helianthemum nummularium L. Miller subsp. lycaonicum Coode&Cullen Cistaceae

Abstract

The genus Helianthemum Miller, includes 12 annual or perennial species in the Flora of Turkey, 4 of which are endemic. In this study, macro and micromorphological, anatomical and palynological characteristics of the endemic Helianthemum nummularium L. Miller subsp. lycaonicum Coode&Cullen are studied. This species is grown on steppe, chalky and limestone slopes in Turkey. In morphological studies, detailed descriptions of the H. nummularium subsp. lycaonicum and characteristic features are given. Also, identification key of four subspecies added. In anatomical studies, cross sections of root, stem and leaf were examined. Besides, seed morphology is studied by SEM. According that, seeds are ovate. The seed coat ornamentation is verrucate. The pollen grains are tricolporate, medium sized and prolate. Apocolpial area is rather narrow. Exine is very thin. Exine ornamentation is identified as striate-perforate on SEM studies

Keywords

• Helianthemum,Cistaceae,morphology,anatomy,palynology

Türkiye’deki endemik Helianthemum nummularium L. Miller subsp. lycaonicum Coode&Cullen Cistaceae üzerinde taksonomik çalışmalar

Abstract

Helianthemum Miller cinsi Türkiye Florası’nda tek veya çok yıllık 12 tür içermekte olup, bunlardan 4’ü Türkiye için endemiktir. Bu çalışmada, endemik olan Helianthemum nummularium L. Miller subsp. lycaonicum Coode&Cullen türünün morfolojik, mikromorfolojik, anatomik ve palinolojik özellikleri çalışılmıştır. Bu tür Türkiye’de step, kireçli ve kireç taşlı yamaçlarda yetişmektedir. Morfolojik çalışmalarda H. nummularium subsp. lycaonicum’un ayrıntılı morfolojik betimleri ve karakteristik özellikleri verilmiştir. Ayrıca türün 4 alttürüne ait teşhis anahtarı eklenmiştir. Anatomik çalışmalarda kök, gövde ve yaprağın enine kesitleri incelenmiştir. Ayrıca, tohum morfolojisi taramalı elektron mikroskobu SEM ile çalışılmıştır. Buna göre, tohumlar ovat, tohum kabuğu ornamentasyonu verrukat siğilli ’tır. Polen taneleri trikolporat, orta boyutlu ve prolattır. Kolpuslararası bölge oldukça dardır. Ekzin çok incedir. SEM ile yapılan incelemelerde ekzin ornamentasyonu striat-perforat olarak tanımlanmıştır

Keywords

• Helianthemum,Cistaceae,morfoloji,anatomi,palinoloji

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