摘要:

ChionanthusL.(1753) andLinocieraSwartz (1791) being considered congeneric.nine continental African species and three Madagascan species hitherto included inLinocieraare transferred toChionanthus.Synonymy, concise statements of distribution and a key are provided.Chionanthus richardsiaeis a new species from Zambia; a biographical note on its collector, Mary Richards (1885–1977), is include

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1980.tb01984.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

The type specimens ofErica Ciliaris, E. Tetralixand ofE.x watsoniiare located. The variantof E.ciliariswithout glandular hairs on its stems and leaves is chosen as the lectotype of the species; the lecrorvpe ofE. Tetralixia glandular‐haired, as is that ofE.xwatsoni

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1980.tb01985.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

Myriophyllum exalbescensFernald, hitherto regarded as a North American endemic, has been fund to occur widely as a native plant in northern Europe, where it has occasionally been distinguished as a subspecies or variety ofM.spicatumL.under the epithetsquamosumLinnacus original concept ofM.spicalumappears to have includedM.exalbescens(and alsoM. AlterniflorumDC.) but selection ofBurserVII(1)79 at UPS as lectotvpe ensures the continued use of the epithetspicatumfor the native Eurasian weed species to which it is customarily applied..M.verlicillalumL., the name of a morphologically similar species, is also lectotypified in a way that preserves its current usage. Distinguishing features ofM.exalbescensandM.spicatumare provided along with details of the synonymy and presently known distribution in Europe ofM.exalbescens.

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1980.tb01986.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

The genusLeptospermum(Mytaceae) is represented on Mount Kinabalu, Borneo, byL.flavescens(widespread on Malesian mountains and uplands) andL.recurvum(endemic to Mount Kinabalu). Analysis of the general morphology, leaf characters, leaf anatomy and flavonoid content of field collection, of both taxa at 1970–4000 m indicated thatL.recuruumis a distinct species, most probably derived fromL.flavescenS. L.recurvumindividuals display a striking variation in leaf pubescence. Seedlings of. These plants grown under uniform conditions were not genetically variable (as seen in the uniformity of peroxidase and acid phosphatase isozymes).Variation that did occur was not correlated with altitude or any other identifiable ecological factors. The sporadic distribution of individuals producing non‐viable seeds, probably an expression of genetic load, is another indication of a lack of genetic diversity.L.recurvummay have evolved from a population ofL.flaurscenson Mount Kinabalu, most probably during the Pleistoc

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1980.tb01987.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

Most apical resting buds ofChoisya tenatainclude inflorescence buds in the axils of their lower consecutive paired scales. These inflorescences develop as apical buds which burst in spring. The whole of the lateral inflorescence system on a shoot originating from an apical bud may be viewed as a single, proliferous inflorescence. After the spring flush there are usually two other flushes of the same shoot within the same season, each of which may be accompanied by the development of lateral inflorescences as in the spring flush. Each further flush produces an apical ‘lammas shoot’. As an apical lammas shoot elongates, lateral lammas shoots may also develop from upper, previously resting, axillary buds on the underlying stem segment of the preceding flush. Lateral inflorescences on apical lammas shoots arise from axillary buds preformed within the briefly‐dormant apical buds terminating the preceding flush. These inflorescences, as well as the spring ones, represent proleptic shoots. The production of resting apical buds between two intra‐season flushes of a shoot may be fugacous, without the differentiation of perfect bud‐scales, and with curtailmenl ol internode elongation. As no environmental influence seems to be responsible for intra‐season rhythmicity in development, this is said to be endorhythmic. The interrelations of proleptic to sylleptic shoots ar

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1980.tb01988.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY

摘要:

SEM examination of the epidermis of mature leaves of 37 species in the ten sections ofJatropha(Euphoi‐biaceae) has provided information consistent with an earlier revision of the genuS. All species examined show basic paracyic stomata, excludingJ.fremontioideswhich has anisocytic stomata. Subgenera are well demarcated by presence of true paracytic stomata in subgenusCurcasand hrachyparacytic stomata in subgenusJatropha. The two subgenera can also be distinguished by the presence of smooth hairs in subgenusJatrophaand verrucose hairs in subgenusCurcas(except in sectionCurcas).Uniseriate, inulticellular hairs occur only in the three most advanced.closely related.sections (Jatropha, CollenuciaandSpinosae) in subgenusJatropha.Similarities and dissimilarities of cuticular ornamentations, shape of the epidermal and vein cells and direction of anticlinal walls can be used as distinguishing characters, usually significant at the species leve

ISSN:0024-4074    

DOI:10.1111/j.1095-8339.1980.tb01989.x

出版商:Blackwell Publishing Ltd    

年代:1980

数据来源: WILEY