摘要:

AbstractA new subspecies ofHieracium sparsum(Asteraceae) from Italy.Hieracium sparsumFriv. subsp.pauliiSzeląg sp. nova from Italy is described as new to sciences. The new subspecies is illustrated by photographs of its holotype and compared with related taxa. It is the first record ofH. sparsumfor Italy

ISSN:0014-8962    

DOI:10.1002/fedr.20001110502

出版商:Wiley‐VCH Verlag    

年代:2000

数据来源: WILEY

摘要:

AbstractThe genusAtriplexL. is revised from Saudi Arabia. In all 10 species are reported, out of which seven are native(Atriplex coriacea, A. dimorphostegia, A. farinosa, A glauca, A. halimus, A. leucocladaandA. tatarica), and three are introduced and cultivated/naturalised(A. canescens, A. semibaccataandA. suberecta). The study has introduced the presences of following new taxa:Atriplex dimorphostegiaf.collenetteaAl‐Turki, Omer&A. Ghafoor f. nova, andAtriplex leucocladavar.mandavilleaAl‐Turki, Omer&A.Ghafoor var. nova. Status and history of genera segregated fromAtriplexhas been discussed. A key for identification of taxa recognized and their descriptions are given; notes on nomenclature, variation pattern, ecology, distribution maps, local names and uses are provided. A list of introduced and cultivated species is appen

ISSN:0014-8962    

DOI:10.1002/fedr.20001110503

出版商:Wiley‐VCH Verlag    

年代:2000

数据来源: WILEY

ISSN:0014-8962    

DOI:10.1002/fedr.20001110504

出版商:Wiley‐VCH Verlag    

年代:2000

数据来源: WILEY

摘要:

AbstractShoot organization, branching patterns and growth cycle were studied in natural populations of two herbaceous, root‐climbing lianas,Philodendron rudgeanumandPh. fragrantissimum, occurring in remnant areas of moist tropical forest in the Brazilian States of Pernambuco and Alagoas. The shoot architecture of both species is based on a repeating pattern of primary modules, each involving the successive transformation of flagelliform shoots into stolons and then root‐climbers. Significant differences in the detailed modular construction of the two species were also observed. A comparision of the two species is made withMonstera adansoniivar.klotzschiana, growing in the same habi

ISSN:0014-8962    

DOI:10.1002/fedr.20001110505

出版商:Wiley‐VCH Verlag    

年代:2000

数据来源: WILEY

摘要:

AbstractA scanning electron microscope (SEM) study of leaf patterns inCalyptrochilumKraenzl. was carried out in search of constant taxonomic characters.Calyptrochilum chrystyanum(Rchb.) Summerh. is characterized by a network of horizontal grooves, dome shaped micropapillae and a mass of soft wax, whileC. emarginatum(Sw.) Schltr. is distinguished by the presence of densely overlapping conical and globular types of micropapillae. Sculpturing features in the genus are characteristic and therefore of utility in identifying even sterile specimens and fragments. An attempt is made to relate the observed surface patterns to distribution, ecology and habitat tolerance.

ISSN:0014-8962    

DOI:10.1002/fedr.20001110506

出版商:Wiley‐VCH Verlag    

年代:2000

数据来源: WILEY

摘要:

AbstractThe first plant lists and collections from Alaska – Georg Wilhelm Steller's botanical work in America.Georg Wilhelm Steller was the first botanist in Alaska. As a member of the 2nd Kamchatka Expedition under Vitus Bering, he botanized for six hours on July 20, 1741 (resp. on July 31 after the modern calendar), on the western shore of Kayak Island and some hours on August 30–31 (resp. September 10–11), 1741, on Nagai Island, Alaska.The result of these short excursions were 3 manuscripts: the „Catalogus plantarum intra sex horas…”︁, the „Mantissa plantarum minus aut plane incognitarum”︁, and the „Catalogus seminum anno 1741 in America septemtrionali…”︁. (Steller's „Cat(alogus) Plant(arum) Amer(icae)”︁ which Gmelin had at hand when writing his „Flora sibirica”︁ is hitherto unknown.).While the first of these manuscripts was already published by Stejneger (1936) and analyzed by Thilenius (1992), the second and third are first published, translated and analysed here. (Copies of the manuscripts were kindly made available by Dr. W. Hintzsche and the Archive of the Russian Academy of Sciences.) Furthermore, a first translation and new interpretation is presented also for the „Catalogus plantarum”︁. By comparison with the two other manuscripts, modern literature and with the help of the old botanical literature that Steller used on his journey, most of Steller's plant names could be translated into modern botanical nomenclature. A recent plant collection from Kayak by U. Wannhoff, which is also published here, was extremely helpful.Whereas Thilenius concludes that less then 10 percent of Steller's 143 names in the „Catalogus plantarum”︁ are correct, the new analysis reveals that m

ISSN:0014-8962    

DOI:10.1002/fedr.20001110507

出版商:Wiley‐VCH Verlag    

年代:2000

数据来源: WILEY

ISSN:0014-8962    

DOI:10.1002/fedr.20001110501

出版商:Wiley‐VCH Verlag    

年代:2000

数据来源: WILEY