摘要:

Hybrid plants were obtained in an intergeneric cross betweenTaenìatherum caputmedusae(2n = 2x = 14) andTriticum aestívum(2n = 6x = 42). The chromosome number was as expected 2n = 28. Morphologically the offspring looked likeTriticum aestívum. Analysis of meiotic metaphase I showed an unexpected high number of bi‐ and trivalents which is ascribed to homoeologous pairing of chromosomes fromT. aestivum. It is concluded that the genome ofTaeniatherumhas effects on the pairing regulation system present inT. aest

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1994.tb00562.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

TheElymus semicostatusgroup is revised taxonomically. Previously, 32 taxa have been described in the group. Here, nine of these are accepted as species and two as interspecific hybrids, namely,E. semicostatus, E. macrochaetus, E. validus, E. abolinii, E. fedtschenkoi, E. nevskii. E. praeruptus, E. panormitanus, E. nepalensis, E. ×brachyphyllus, andE. ×macrolepis. Synonymy, morphological descriptions, illustrations, chromosome numbers, and a key to the taxa are provide

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1994.tb00563.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

The following names are lectotypified:Polygonum amphibium, P. foliosum, P. hydropiper, P. lapathifoliumssp.leptocladum, P. pallidumandP. persicaria, Polygonum persicariavar.incanais neotypified.Polygonum ruderaleis a superfluous nomenclatural synonym ofP. persicaria. The following new combinations are made:Persicaria lapathifoliassp.pallida, P. lapathifoliavar.incanaandP. lapathifoliavar.linicola. The nomenclature of H. B. Danser's early works is discussed.Flora Nordica Notes no. 8.

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1994.tb00564.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Old dry‐stored seeds of the annual pyrophyteGeranium bohemicumfrom seed collections and herbaria were tested to determine their germinability. Ten samples of seed, ranging in age from 3 to 200 years, were used. The oldest seeds to germinate (three out of ten) were from a 129‐year old collection. All three seedlings developed into healthy plants. This finding supports the assumption thatG bohemicumcan emerge from a bank of long‐lived seeds after forest

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1994.tb00565.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Centaurea crocata, described in 1984 from the Serra de Monchique in the Algarve (S Portugal), has a long history of confusion withC. prolongifrom S Spain. From the study of herbarium specimens and of living plants, authors conclude that all previous Portuguese citations ofC. prolongibelong actually toC. crocata. However, authors' studies confirm the real presence ofC. prolongiin some relictic localities in the limestones of the extreme south of the Algarve. A morphologic comparison between the two species is performed and authors suggest forC. crocataa hypothetical hybrid origin betweenC. prolongiand a species of sect.Chamaecyanus.

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1994.tb00566.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Geonoma polyandra, a new species of Arecaceae from Ecuador is described. It has staminate flowers with 10–12 stamens. Species with more than six stamens have previously not been described in the genu

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1994.tb00567.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

Drímia exigua, a small and slender species, is described from the Guder river valley in Ethiopia

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1994.tb00568.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

The following taxa ofDrimiopsis(Hyacintheceae) are recognized for East Africa (Kenya, Tanzania, Uganda):D. barteri(2n=44),D. botryoidesssp.botryoides(2n=44, 55, 66),D. botryoidesssp.prostratassp. nov. (2n = 22),D. maculataandD. sp. A.

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1994.tb00569.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

A new speciesGarcinia dhanìkharíensis(Clusiaceae) from South Andaman, India is described and illustrate

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1994.tb00570.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY

摘要:

The new speciesAbrus baladensis, from fixed sand dunes near Mogadishu in south‐central Somalia, andA. gawenensis, from limestone or sand over limestone in central Somalia, are describe

ISSN:0107-055X    

DOI:10.1111/j.1756-1051.1994.tb00571.x

出版商:Blackwell Publishing Ltd    

年代:1994

数据来源: WILEY