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Dr. Anton Weber 《Plant Systematics and Evolution》1973,121(5):279-283
Zusammenfassung Die vielfach als Stipeln angesprochenen basalen Blattanhänge einiger Taxa der GesneriaceengattungRhytidophyllum
Mart. können nicht als solche gelten, da ihnen wesentliche Merkmale echter Stipeln fehlen, insbesondere konstante Ausbildung bzw. Auftreten in der Blattfolge, praekursive Anlegung und proleptische Entwicklung. Gleichwohl sind sie aber als Bildungen des Blattgrundes zu betrachten und daher als vaginale Öhrchen im Sinne vonWeberling zu bezeichnen. Die bei manchen Taxa auftretenden sitzenden Laubblätter mit verbreiterter, teilweise stengelumfassender Blattbasis werden durch laubige Verbindung von Blattspreite und Öhrchen erklärt.Infolge Fehlens echter Stipeln bildet somitRhytidophyllum keine Ausnahme hinsichtlich der Blattgestaltung unter den Tubifloren.
Herrn Prof. Dr. W.Leinfellner und Herrn Prof. Dr. F.Ehrendorfer danke ich für die Durchsicht des Manuskripts. 相似文献
About the stipules ofRhytidophyllum Mart. (Gesneriaceae)
Summary The foliar appendages at the base of the short petiole in some taxa ofRhytidophyllum are often called stipules. But this term is not applicable, because these appendages lack important characteristics of true stipules, f. i. constancy in form and appearence during leaf succession, early ontogenetic origin and prolepsis. Nevertheless they are effigurations of the leaf base (Unterblatt) and have therefore to be regarded as vaginal auricules in the sense ofWeberling. The sessile and partially sheating leaves in someRhytidophyllum taxa result from foliar connections between lamina and auricules.Because of the absence of true stipulesRhytidophyllum fits well into the general leaf morphology of Tubiflorae.
Herrn Prof. Dr. W.Leinfellner und Herrn Prof. Dr. F.Ehrendorfer danke ich für die Durchsicht des Manuskripts. 相似文献
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Statistical population analyses have been carried out on so-calledOphrys arachnitiformis, partly sympatricO. sphecodes s. l. as well as on other species ofOphrys (O. holosericea, O. exaltata, O. apulica, O. cornuta, O. biscutella, O. bertolonii, O. bertoloniiformis.). Altogether 63 populations with 521 individuals were studied in regard to 54 morphological parameters. — It can be shown thatO. arachnitiformis is an extremely heterogeneous assemblage which includes taxa of most diverse origin, different degrees of stability and nomenclatorial rank. Only common trait is their very diverse relationships withO. specodes s.l.—The basionymO. arachnitiformis
Gren. & Phil. refers to a colour variant ofO. sphecodes
Mill. subsp.sphecodes only, and is not applicable to other segments of the assemblage.A late flowering, morphologically and biologically well isolated group of populations from southern France without any perceptible hybrid influence is established as a new species:Ophrys splendida
Gölz & Reinhard. Populations from north and central Italy with distinct characters but hybrid influences fromO. holosericea/O. exaltata are calledO. tyrrhena
Gölz & Reinhard.O. morisii, an endemic to Sardinia, represents an independent species of still obscure evolution. The hybrid interpretation ofO. catalaunica is statistically corroborated, but somewhat modified. For the remaining segments ofO. arachnitiformis investigated (from Castilia, Dalmatia, and the Monte Gargano) no formal taxonomic proposals are made, but some suggestions about their genesis are possible. 相似文献
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α-(Hydroxymethyl)serine was isolated and characterized from the seeds of Vicia pseudo-orobus (Leguminosae). 相似文献
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V. v. Aichinger 《Plant Systematics and Evolution》1880,30(6):187-188
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Ohne Zusammenfassung 相似文献
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The new genus and speciesGrzegorzewskia erratica n.gen. n.sp. from a “Mid-Silurian” erratic boulder of the locality “Brodtener Ufer” (at the shore of the Baltic Sea) near Travemünde, Germany, is described. It is attributed to the family LechritrochoceratidaeFlower inFlower &Kümmel 1950 (Nautilida) which is characterized by dextrally coiled torticone conchs. The new genus and species is distinguished from all other members of the family by its smooth surface, the depressed conch section, and the formation of a ventral rounded keel, as well as by the initial part of the conch which deviates extremely from the axis of coiling. The early ontogenesis of the Lechritrochoceratidae is briefly discussed. 相似文献
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