摘要:

Nauplius(namedBuboniumin previous publications) is a mainly Macaronesian and N African genus belonging to theInula‐group of the Asteraceae‐Inuleae. Eight species and five subspecies are recognized and a key to all taxa is included. The morphology, phylogeny and phytogeography of the genus are also discus

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1987.tb00909.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1987.tb00910.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

Thirty‐two genera of the Monimiaceae are assigned to six subfamilies and eight tribes. Two further genera are insufficiently known to be placed. One subfamily (Glossocalycoideae Thorne, two tribes (Hennecartieae Philipson, Palmerieae Philipson) and one genus (LaureliopsisSchodde) are described as ne

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1987.tb00911.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1987.tb00912.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

A historical review ofOrthaeais provided and the present generic concept is amplified to includeEmpedoclesiaandLysiclesia. A key to the 31 recognized species is given.Orthaea paniculata, O. glandulifera, O. oedipus, andO. coriaceaare described as new. New combinations areOrthaea caudata, O. minor, O. panamensis, O. brachysiphon, andO. stipitata.

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1987.tb00913.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

Eight new species ofAbildgaardiasubgen.Bulbostylisare described from tropical Africa, viz.Abildgaardia squarrosa, A. densiflora, A. acutespicata, A. angustespicata, A. lacunosa, A. microcephala, A. microrotundata and A. pluricephala.

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1987.tb00914.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

The new speciesCoelidium flavum, a relative of C.ciliare, is described. It is distinct in the broader, ovate, strongly convex leaves, the pubescent calyx tube, and in having the filaments fused for only ca. 1 mm at the base.

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1987.tb00915.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

The geographical distribution of different karyotypes in Tropical African genera of Hyacinthaceae is studied. InAlbuca, Dipcadi, Drimia(includingUrginea), andDrimiopsisthere seem to be a general trend of increasing level of ploidy and/or basic number. There is also a tendency of increasing karyotype asymmetry from the south towards north and west. Southern Africa is therefore probably a centre of dispersal (and origin?) for these genera. In the subgenusUrophyllonofOrnithogalumthe cytological conditions are in accordance with a hypothesis of northern origin and migration via East Africa towards south and west. Several new chromosome numbers are presented.

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1987.tb00916.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

Subcellular changes in the embryo and endosperm ofAtropa belladonnawere studied at four developmental stages. The endosperm cells turn to storage cells much earlier than those of the embryo, which matures later. Cells of the cotyledon and radicle are very similar in structure. The young cells contain large osmiophilic spherosomes. The cytoplasm is filled with ribosomes but dictyosomes are very rare. Some proplastids, containing starch, and mitochondria are present in the early developmental stages but do not occur in the dormant cells. During ripening, the vacuoles of the endosperm cells and embryo develop into protein bodies. They become filled with protein material without any recognisable transport mechanism. Protein bodies have several electron‐translucent globoid cavities and the protein mass contains a roundish or crystalline body. This body does not stain with potassium iodide but with periodic acid Schiff‐reagent and protein stains, indicating that it contains glycoproteins. The embryo and endosperm cells of ripeAtropaseeds are very similar and filled with protein bodies and small spheroso

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1987.tb00917.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY

摘要:

Light and scanning electron microscopical investigations were carried out to study distribution, morphology and secretion of glandular trichomes during leaf development inTamus communis. During leaf growth glandular trichomes arise continously from single protodermal cells. At maturity, they are composed of a 6‐celled gland head, a secretory neck cell, an “endodermal” cell, and one basal or reservoir cell. During the early stage of secretion, several regularly arranged crater‐like pores differentiate on the cuticular surface of the gland head. Through these pores (1–1.5 μm in diameter), the secretion flows out as a thin film or as rods (0.4 μm in diameter) spreading on the trichomes and on the leaf surface. Histochemical tests indicate that the secretion is composed of a small amount of carbohydrates and an abundant fraction of lipophilic material. Proceeding towards senescence, the wall degeneration of the gland head gives rise to a strong histochemical reaction for insoluble polysaccharides. The results presented are compared with those of other investigations on the pattern of secretion in glandula

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1987.tb00918.x

出版商:Blackwell Publishing Ltd    

年代:1987

数据来源: WILEY