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Experimental plant embryology yesterday, today and tomorrow

100%

Zenkteler M.

Acta Biologica Cracoviensia. Series Botanica et Zoologia. Supplement

1997

tom 39

nr 1

Frequency of apomixis in seed plants of Poland

100%

Czapik R. , Koscinska-Pajak M.

Folia Morphologica

1998

tom 57

nr 1

Zagadkowa roślina z wczesnej jury Gór Świętokrzyskich

84%

Gierliński G. D. , Ploch I. , Sabath K. , Ziaja J.

Przegląd Geologiczny

2006

tom Vol. 54, nr 2

139-141

Fossils plants (less than 0.5 m high) preserved in upright position were found in Śmiłów Quarry (E of Szydłowiec) at the northern slope of the Holy Cross Mountains. The plants were preserved as impressions of ascending narrow-leafed stems in fine-grained sandstone of the Drzewica Formation (upper Pliensbachian). The leaves are 5-25 cm long and about 2-5 mm wide; the angle between them and the short main axis ranges within 20-30o. Morphology of the plant resembles schizeacean ferns, but also that of Aethophyllum stipulare Brongniart 1828 from Anisian of France, recognized by Grauvogel-Stamm (1978) as an herbaceous gymnosperm. Grauvogel-Stamm (1978) supposed that the leaves Podozamites and cone scales Swedenborgia, common in Jurassic strata of higher palaeolatitudes, are derived from descendants of Aethophyllum. Podozamites leaves often occur in many dinosaur track-bearing horizons in the Polish Jurassic. Thus, herbaceous conifers might have played an important and often underestimated role in the Mesozoic ecosystems (possibly as a substantial part of dinosaur diet). The possiblity of coniferous equivalents of Cenophytic herbaceous angiosperms, as well as a possibility of their coevolution with Mesozoic low browsing and grazing herbivore megafauna is worth further palaeobotanical and palaeoecological studies.

Aggregations of organelles in sporogenesis of Pteridophyta and microsporogenesis of Gymnospermae

84%

Gielwanowska I. , Szczuka E.

Bulletin of the Polish Academy of Sciences. Biological Sciences

1997

tom 45

nr 2-4

Drzewa i krzewy Miedzyzdrojow

67%

Ciaciura M. , Uljanowska A. , Roman J.

Zeszyty Naukowe. Acta Biologica. Uniwersytet Szczeciński

2005

tom 12

5-25

Rośliny interesujące i chronione w projektowanym Boreckim Parku Krajobrazowym

59%

Endler Z.

Acta Academiae Agriculturae ac Technicae Olstenensis. Agricultura

1992

tom 54

3-14

W pracy przedstawiono syntetyczny przegląd roślin naczyniowych prawnie chronionych oraz rzadkich i interesujących z punktu widzenia naukowego i biogeograficznego, zanotowanych na obszarze projektowanego Boreckiego Parku Krajobrazowego.

The paper presents a synthetic review of officially protected vascular plants and of rare plants interesting from a scientific and biogeographic point of view, which occur in the area a of the planned Borecki Landscape Park.