ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670339

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

The anatomy and mode of growth of the heteroarthrocarpic fruits ofTrachystoma (T. apbanoneummMaire & Weiller,T. balliiO. E. Schulz andT. labasii Maire)andCeratocnemum (C. rapistroidesCoss. & Bal.) are studied; the fruit ofErucastrum littoreum(Pau & F. Quer) Maire is also included for comparison as it shows the same trend developed to a much lesser extent. A short description of all present tissues is given. Evaluations of the growth of ovaries and siliques have shown that a) mitosis continues in these fruits after anthesis, and b) the bigger a fruit segment (valvar or rostral) is, the higher mitotic activity is registered. The presence of layers of abscission tissue between the replum and the valvae is here considered to be a sign of primitiveness. In general, fruit anatomy is closely related to other exomorphological characters.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670340

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

The distribution of approx. 1260 Iberian and Balearic endemics into 50 geographic sub-units clearly shows which are the most favoured regions from a floristic point of view. About one half of the endemics are in the South and Southeast, under a hypothetical line traced between Huelva and Majorca. As expected, Ibero-African taxa tend also to grow in the lower half of the Peninsula. One half of the endemic taxa are local endemics, i.e. they grow in one geographical sub-unit only. Local endemics produce a pattern of distribution which is similar to that of general endemics. Sierra Nevada (Granada province) representes the highest concentration of endemic taxa in the Iberian Peninsula and probably in continental Europe.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670341

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

La distribution de la polyploïdie dans 163 clones duPhragmites australisde la région méditerranéenne, comme celle des flavonoïdes dans 41 d'entre eux, montrent que le polymorphisme de cette espèce est plus en rapport avec sa grande faculté d'accommodation et sa forte hétérozygotie, qu'avec ses différents niveaux de ploïdie. Si, d'une manière générale, le complexe duP.a.atteint un état de maturité avancée, la différenciation de cette espèce est moins variée dans la région méditerranéenne que dans les régions ouest- et centre- asiatiques.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670342

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

A caryosystematic study ofFritillaria obliqua-complex (F.obliqua, F. tuntasiaand F.ehrhartii)endemie in Greece is presented. In a new combination F.tuntasiais considered as a synonyme of F.obliqua.Three populations of F.obliqua(2n= 24 + 0–3B) and three ofF. ehrhartii(2n= 24 + 0-lB) are studied cytologically and their karyotypes and idiograms are given. The geographical distribution of the two species (F. obliquaandF. ehrhartii) suggests a vicariation character.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670343

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

Description de la zonation de la végétation vasculaire des rochers granitiques (ainsi que localement de grès calcarifères) à la Revellata (côte nord-occidentale près de Calvi):Crithmo-Limonietum articulataegroupements chasmophytiques duCrithmo-Limonion, ceinture semi-halophile (pelouse-garrigue àHelichry- sum italicum, pelouse àBrachypodium retusum, groupement àNarcissus tazettasur des sols profonds et ombragés) et maquis littoraux généralement anémomorphes. Brève discussion de certains facteurs écologiques, en particulier l'apport d'embruns par le vent et l'action mécanique de celui-ci. Enfin notes floristiques relatives surtout à des espèces très rares en Corse ou réputées «montagnardes» dans l'île.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670344

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670345

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

The spores of 20 specimens ofApslenium fontanum(L.) Bernh. from BCF have been studied. Description of external morphology and ornamentation have been made here for the first time. The largest and minor spore diameters have been measured in order to identify a possible taxonomic criterion through this character. Only interdiametric ratio D/d, was constant.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670346

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670347

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor

摘要:

In Sicily,Orchis commutataresults tetraploid (2n= 84) whereas individuals from Calabria (S Italy) are diploid in accordance with theO. tridentatagroup in Europe.

ISSN:0083-7792    

DOI:10.1080/00837792.1984.10670348

出版商:Taylor & Francis Group    

年代:1984

数据来源: Taylor