Potentilla psammophila (Rosaceae), a new species from N Bohemia
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چکیده
منابع مشابه
Megagametophyte development in Potentilla nivea (Rosaceae) from northern Swedish Lapland.
An investigation of the embryology of Potentilla nivea was carried out using a confocal laser scanning microscope. The crassinucellate nature of the ovule as well as the presence of a multicellular archesporium was confirmed. A "nucellar cap" builds up as the result of mitotic divisions in the parietal cell tissue and the nucellar epidermis. Earlier reports that several mature megagametophytes ...
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A new species of Lachemilla (Rosaceae), Lachemilla mexiquense D.F. Morales-B., from Mexico is described and illustrated. This species is similar to Lachemilla aphanoides by its tripartite leaves and glomerulate inflorescence with entirely glabrous flowers, but it differs by its stonoliferous habit, persistent basal leaves and basal stipules, and smaller flowers with a campanulate-elongate hypan...
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Despite its wide distribution, little documentation exists to confirm that butterflies use the woody shrub Potentilla fruticosa (Linnaeus) (Rosaceae) as a nectar plant. During the summer of 2004, we observed 36 individual butterflies belonging to 10 species nectaring on P. fruticosa in the Jemez Mountains, New Mexico. Butterflies spent 56% of total observed nectaring time on P. fruticosa, where...
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The flow cytometric seed screen allows for identification of reproductive modes of seed formation and inference of the ploidy of contributing gametes. However, the lack of a mathematical formalization to infer male/female genomic contributions, and the prerequisite of a binucleate female contribution to the endosperm limits its applicability. We evaluated this assumption combining a DNA-based p...
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گونه Haplothrips zabolius sp. n. از روی دو گونه گیاه Cynodon davtylon (Poaceae) وPlantago lanceolata (Plantaginaceae) از جنوب شرقی ایران توصیف شده است. بهنظر میرسد گونه جدید به برخی از گونههای Haplothrips موجود روی غلات شامل H. aculeatus (Fabricius)، H. eragrostidis Priesner و H. hukkineni Priesner نزدیک باشد. اغلب نمونههای گونه جدید دارای تنها یک عدد اندام حسی روی بند سوم شاخک هستند اما تع...
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ژورنال
عنوان ژورنال: Willdenowia
سال: 2009
ISSN: 0511-9618,1868-6397
DOI: 10.3372/wi.39.39105