Biology of irises

Iris je rod biljaka koji sadrži oko 300 vrsta, a rasprostranjen je na cijeloj Sjevernoj Zemljinoj polutci. Staništa su im također jako varijabilna pa ih se može naći od pustinja do močvara. To su višegodišnje zeljaste biljke s rizomom koji puže ili lukovicom. Zahvaljujući svojim velikim i često živopisno obojenim cvjetovima, ove biljke su od najranije povijesti fascinirale ljude. Cvjetovi se najlakše mogu prepoznati po šest listića perigona od kojih su tri vanjska često različite veličine i oblika od tri unutrašnja listića te su međusobno nasuprotno raspoređeni. Ovako veliki rod u kojemu postoje mnogi prirodni križanci je bilo teško točno sistematizirati. Mnogi botaničari su se bavili klasifikacijom ovoga roda, a danas se smatra da se rod Iris može podijeliti na šest podrodova. Moderne analize temeljene na sekvencioniranju DNA pokazuju da neki podrodovi nemaju monofiletsko podrijetlo, te je očito da je potrebno napraviti noviju klasifikaciju temeljenu na spomenutoj metodi. Rod je prisutan u flori Hrvatske s dvanaest samoniklih svojti.Iris is a genus of plants that includes about 300 species and it's distributed on the hole Northen Hemisphere. Their habitats are also extremely variable so they can be found anywhere from deserts to swamps. They are perennial herbs with creeping rhizomes or bulbs. Due to their large and often vividly coloured flowers, these plants have fascinated people from the very beginning. Flowers can be easily recognized by their six petals of perigon of which the outer three are often of different sizes and shapes compared to the three inner ones. Inner and outer petals are opposite from each other. Genus this big in wich many natural hybrids exist was hard to classify. Many botanists were involved in classification of this genus, and today is considered that genus Iris can be divided into six subgenera. Modern analysis that are based on DNA sequence data shows that some subgenera don't have monophyletic origin and it's obvious that new classification based on this method is needed. Genus is present in flora of Croatia with twelve indigenous taxa

Novi nalazi rijetke mahovine Buxbaumia aphylla Hedw. u Hrvatskoj

A rare moss Buxbaumia aphylla was only recently found in Croatia. Here we report five new localities, one from Dilj Gora and four from Mt. Papuk. Small populations on bare acidic soil within the forest and along the forest edges were registered.Rijetka mahovina Buxbaumia aphylla tek je nedavno po prvi puta pronađena u Hrvatskoj. U priopćenju se navodi pet novih nalazišta vrste, jedno na Dilj gori i četiri na Papuku. Pronađene su male populacije na golom kiselom tlu unutar šume i uz rub šume

Biology of irises

Iris je rod biljaka koji sadrži oko 300 vrsta, a rasprostranjen je na cijeloj Sjevernoj Zemljinoj polutci. Staništa su im također jako varijabilna pa ih se može naći od pustinja do močvara. To su višegodišnje zeljaste biljke s rizomom koji puže ili lukovicom. Zahvaljujući svojim velikim i često živopisno obojenim cvjetovima, ove biljke su od najranije povijesti fascinirale ljude. Cvjetovi se najlakše mogu prepoznati po šest listića perigona od kojih su tri vanjska često različite veličine i oblika od tri unutrašnja listića te su međusobno nasuprotno raspoređeni. Ovako veliki rod u kojemu postoje mnogi prirodni križanci je bilo teško točno sistematizirati. Mnogi botaničari su se bavili klasifikacijom ovoga roda, a danas se smatra da se rod Iris može podijeliti na šest podrodova. Moderne analize temeljene na sekvencioniranju DNA pokazuju da neki podrodovi nemaju monofiletsko podrijetlo, te je očito da je potrebno napraviti noviju klasifikaciju temeljenu na spomenutoj metodi. Rod je prisutan u flori Hrvatske s dvanaest samoniklih svojti.Iris is a genus of plants that includes about 300 species and it's distributed on the hole Northen Hemisphere. Their habitats are also extremely variable so they can be found anywhere from deserts to swamps. They are perennial herbs with creeping rhizomes or bulbs. Due to their large and often vividly coloured flowers, these plants have fascinated people from the very beginning. Flowers can be easily recognized by their six petals of perigon of which the outer three are often of different sizes and shapes compared to the three inner ones. Inner and outer petals are opposite from each other. Genus this big in wich many natural hybrids exist was hard to classify. Many botanists were involved in classification of this genus, and today is considered that genus Iris can be divided into six subgenera. Modern analysis that are based on DNA sequence data shows that some subgenera don't have monophyletic origin and it's obvious that new classification based on this method is needed. Genus is present in flora of Croatia with twelve indigenous taxa

A contribution to the knowledge on the distribution of Sedum cepaea L. in Croatia

Metličasti žednjak (Sedum cepaea L.) u Hrvatskoj je rijetko bilježena vrsta, a većina opažanja dogodila se zadnjih 10 godina kada se na ovu vrstu počelo obraćati više pozornosti. U priopćenju se detaljnije opisuju lokaliteti dva nova nalaza u Požeško-slavonskoj županiji uz kratak prikaz opće rasprostranjenosti u Hrvatskoj i osvrt na zaštitu i ugroženost.Purslane-leaved stonecrop (Sedum cepaea L.) is rarely recorded species in Croatia, and most of the observations happened in last 10 years, when more attention was devoted to it. In this paper localities of two new findings in Požeško-slavonska county are described in more detail, with a short description of general distribution in Croatia and the comment on protection and conservation status

New finding of the rare species Sedum annuum L. (Crassulaceae) on Mt. Papuk (Croatia)

Jednogodišnji žednjak (Sedum annuum L.), rijetka i slabo poznata vrsta hrvatske flore, pronađen je na zapadnom Papuku u okolici tvrđave Kamengrad i susjednom Kobilskom brdu. Prije ovoga nalaza vrsta je u Hrvatskoj zabilježena samo jednom, 1975. godine na otoku Braču.Annual Stonecrop (Sedum annuum L.), rare and poorly known species of the Croatian flora, was found on western part of Mt. Papuk, in the vicinity of the remains of Kamengrad fort and also on Kobilsko brdo nearby. Before this finding, the species was recorded in Croatia only once, on the island of Brač in 1975

Biology of irises

Iris je rod biljaka koji sadrži oko 300 vrsta, a rasprostranjen je na cijeloj Sjevernoj Zemljinoj polutci. Staništa su im također jako varijabilna pa ih se može naći od pustinja do močvara. To su višegodišnje zeljaste biljke s rizomom koji puže ili lukovicom. Zahvaljujući svojim velikim i često živopisno obojenim cvjetovima, ove biljke su od najranije povijesti fascinirale ljude. Cvjetovi se najlakše mogu prepoznati po šest listića perigona od kojih su tri vanjska često različite veličine i oblika od tri unutrašnja listića te su međusobno nasuprotno raspoređeni. Ovako veliki rod u kojemu postoje mnogi prirodni križanci je bilo teško točno sistematizirati. Mnogi botaničari su se bavili klasifikacijom ovoga roda, a danas se smatra da se rod Iris može podijeliti na šest podrodova. Moderne analize temeljene na sekvencioniranju DNA pokazuju da neki podrodovi nemaju monofiletsko podrijetlo, te je očito da je potrebno napraviti noviju klasifikaciju temeljenu na spomenutoj metodi. Rod je prisutan u flori Hrvatske s dvanaest samoniklih svojti.Iris is a genus of plants that includes about 300 species and it's distributed on the hole Northen Hemisphere. Their habitats are also extremely variable so they can be found anywhere from deserts to swamps. They are perennial herbs with creeping rhizomes or bulbs. Due to their large and often vividly coloured flowers, these plants have fascinated people from the very beginning. Flowers can be easily recognized by their six petals of perigon of which the outer three are often of different sizes and shapes compared to the three inner ones. Inner and outer petals are opposite from each other. Genus this big in wich many natural hybrids exist was hard to classify. Many botanists were involved in classification of this genus, and today is considered that genus Iris can be divided into six subgenera. Modern analysis that are based on DNA sequence data shows that some subgenera don't have monophyletic origin and it's obvious that new classification based on this method is needed. Genus is present in flora of Croatia with twelve indigenous taxa

Rasprostranjenost, staništa i status vrste Thladiantha dubia Bunge (Cucurbitaceae) u Hrvatskoj

Two previously known localities of Thladiantha dubia in Zagreb (Botanical Garden of Faculty of Science and Savica) were confirmed and four new localities (village Medinci near Slatina, Lateral Channel Adžamovka near Vrbova, village Zvonimirovo and channel Stara Savica in Zagreb) were recorded between 2015 and 2020. In Medinci and Zvonimirovo, male populations were registered, while in all other localities female populations of Th. dubia were discovered flowering and bearing seedless fruits. Since there were no mixed populations found, and specific pollinators of this dioecious and entomophilous species are absent from Europe, the fruits are most likely parthenocarpic. According to our observations, Th. dubia can be classified as a naturalized, non-invasive alien weed in Croatia.U razdoblju od 2015. do 2020. godine potvrđene su dvije ranije poznate lokacije vrste Thladiantha dubia u Zagrebu (Botanički vrt PMF-a i Savica u Zagrebu) te su pronađene četiri nove lokacije (selo Medinci kod Slatine, Lateralni kanal Adžamovka kod Vrbove, selo Zvonimirovo i kanal Stara Savica u Zagrebu). U Medincima i Zvonimirovu zabilježene su muške populacije, dok su na svim ostalim nalazištima pronađene ženske populacije u cvatu i plodu, ali plodovi nisu sadržavali sjemenke. Budući da nisu pronađene miješane populacije oba spola, a u Europi ne dolazi ni specifični oprašivač, plodovi ove dvodomne i entomofilne vrste najvjerojatnije su nastali bez oplodnje partenokarpijom. Na osnovu naših opažanja, Th. dubia se može klasificirati kao naturalizirani, neinvazivni strani korov u Hrvatskoj