摘要:

SUMMARYThe morphology and existing schemes of classification of the genera of Musaceae have been summarized. The anatomy of the vegetative organs of each genus has been described. The following taxonomic conclusions are suggested by the anatomical results:(i)Orchidanthais anatomically quite distinct from other members of the group and its isolation as a distinct family (Lowiaceae) is fully supported.(ii)RavenalaandStrelitziaare almost identical anatomically and are evidently much more closely related to each other than they are to any other genera.(iii)Musais quite distinct anatomically, although it shows some affinities with theRavenala–Strditziacomplex.(iv)Hdiconiais also rather isolated structurally, but shows more affinities withRavenala, StrditziaandMusathan withOrchidanth

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1959.tb00040.x

出版商:Blackwell Publishing Ltd    

年代:1959

数据来源: WILEY

摘要:

SUMMARYThe somatic chromosome complement inSynedrella nodiflorawas found to be 40, of which three pairs are satellited. The karyotypes have been analysed. The presence of 20 chromosomes was noted in diakinesis and metaphase I. Secondary association has been noted. The tapetal cells are quadrinucleate and a periplasmodium is formed.The pollen grains are trinucleate, echinate, ellipsoidal and tetracolporate. The sperm cells are elongated and rod‐shaped.The development of the female gametophyte is of the ‘Polygonum type’. The anti‐. podals are generally two in number, the upper cell being binucleate. In rare cases three uninucleate antipodal cells have also been observed. Endosperm formation is of the nuclear type. The embryo development conforms to theAsteradtype and agrees more or less with theSenecio variationof Johansen.The fruits derived from the disk florets are tubular and have two to three long pointed processes, while those from the ray florets are broad with numerous hairy outgrowths. Both types are

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1959.tb00041.x

出版商:Blackwell Publishing Ltd    

年代:1959

数据来源: WILEY

摘要:

SUMMARYThe author has attempted a revision of all the African species ofTerminalia.She has examined all of the type specimens, except those which were destroyed in Berlin during the recent war, those which are housed in the historic herbaria at Paris and Geneva, and those of two species collected by Italian botanists, which have not been located. She has studied approximately 1400 specimens, and this comprises the bulk of the material hitherto collected.One hundred and fifteen specific names have been used in this genus in Tropical Africa; they have all been accounted for. Only twenty‐eight species are fully accepted in this account; a key for their identification is provided; they are all fully described and each is illustrated by one plate of drawings. Synonymy is given in full, and reasons for that which is new are given. For each of the twenty‐eight species a full bibliography, vernacular names, notes on variation and notes on distribution and ecology are given; a sufficient number of specimens to cover the geographical distribution and to illustrate the range of variation has been selected for citation.Seven species which have been previously described and named are treated as being imperfectly known as the available material is scanty, and they only receive brief mention. All other names hitherto used inTerminaliain Africa are either treated as synonyms, or reasons are given as to why, at the present, they should not be used. Attention is drawn to a further five taxa, which may be new species, but have never been named and described; these are also treated as ‘imperfectly known’ species; the available material is insufficient to allow a more definite taxonomic ju

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1959.tb00042.x

出版商:Blackwell Publishing Ltd    

年代:1959

数据来源: WILEY