Výsledky vyhledávání - "A. Spencer Tomb"

CHROMOSOME NUMBERS IN THE COMPOSITAE. XIV. LACTUCEAE

Autor: Donald W. Kyhos, Peter H. Raven, A. Michael Powell, Kenton L. Chambers, A. Spencer Tomb

Publikováno v: American Journal of Botany. 65:717-721

Reports of 150 original chromosome counts are recorded, including reports of 22 genera and 57 species and subspecific taxa in tribe Lactuceae. Also included are first reports for 12 specific or subspecific taxa. x = 9 appears to be the ancestral base

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::09712fc16dbafde17e6e3b9d2baec944
https://doi.org/10.1002/j.1537-2197.1978.tb06129.x

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Investigation of hybridization between Asclepias speciosa and A. syriaca using alkanes, fatty acids and triterpenoids

Autor: Robert P. Adams, A. Spencer Tomb, S.C. Price

Publikováno v: Biochemical Systematics and Ecology. 15:395-399

Individuals of Asclepias speciosa and A. syriaca from Kansas and Nebraska were sampled and their alkanes, fatty acids and triterpenoids analyzed. Analysis of variance for 30 compounds yielded four significant and seven highly significantly quantitati

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0bd785684ca1be910fdacffd1ba04c5c
https://doi.org/10.1016/0305-1978(87)90052-4

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THE SYSTEMATIC SIGNIFICANCE OF SEED MORPHOLOGY IN THE NEOTROPICAL CAPSULAR‐FRUITED MELASTOMATACEAE

Autor: A. Spencer Tomb, Trevor Whiffin

Publikováno v: American Journal of Botany. 59:411-422

A B S T R A C T Seed shape has traditionally been used as a tribal character in the capsular-fruited Melastomataceae. The seed morphology of the five neotropical tribes-Microlicieae, Tibouchineae, Rhexieae, Merianieae, and Bertolonieae-was studied wi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cdcf0e1100e67e2b0ee77e97a4b6ee1a
https://doi.org/10.1002/j.1537-2197.1972.tb10112.x

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Air Spaces, Secretory Cavities, and the Relationship between Leucophylleae (Scrophulariaceae) and Myoporaceae

Autor: Eric E. Karrfalt, A. Spencer Tomb

Publikováno v: Systematic Botany. 8:29

The isobilateral leaves of Leucophyllum have numerous, spherical air spaces between the abaxial and adaxial palisade mesophyll layers. These spaces are larger than the secretory cavities of Bontia (Myoporaceae) and have no epithelium. Early in ontoge

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f865c2f5920c3813094b318c4db5eb74
https://doi.org/10.2307/2418560

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Chromosome Numbers and Generic Relationships in Subtribe Stephanomeriinae (Compositae: Cichorieae)

Autor: A. Spencer Tomb

Publikováno v: Brittonia. 26:203

Chromosome numbers are reported from over 230 populations representing species in eight genera. First counts are reported for three species ofStephanomeria, five species ofLygodesmia, and one species ofPinaropappus. Base chromosome numbers,x = 6, 7,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1be3d1e97f41637fad8eede1443723b5
https://doi.org/10.2307/2805888

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