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- Wood anatomy (6)
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Articles 1 - 16 of 16
Full-Text Articles in Life Sciences
Wood Anatomy Of Cneoraceae: Ecology, Relationships, And Generic Definition, Sherwin Carlquist
Wood Anatomy Of Cneoraceae: Ecology, Relationships, And Generic Definition, Sherwin Carlquist
Aliso: A Journal of Systematic and Floristic Botany
Wood anatomy of the three species of Cneorurm is described qualitatively and quantitatively. The species differ in features related to ecology and form a clear series in this regard. The wood features of the family can all be matched by some Rutaceae and Simarubaceae, and the characteristics of Cneoraceae are listed in this connection. Nearly as many features are shared by Cneoraceae with Anacardiaceae and Sapindaceae; certain distinctive features may be found in somewhat more distant families, such as Oxalidaceae. Resemblances between Cneoraceae and Euphorbiaceae are attributed at least in part to the fact that Euphorbiaceae comprise a highly heterogeneous …
High-Elevation Draba (Cruciferae) Of The White Mountains Of California And Nevada, Reed C. Rollins, Robert A. Price
High-Elevation Draba (Cruciferae) Of The White Mountains Of California And Nevada, Reed C. Rollins, Robert A. Price
Aliso: A Journal of Systematic and Floristic Botany
Accurate identification of the species of Draba at high elevations in the White Mountains of eastern California and adjacent Nevada has been impossible because of frequent misinterpretations in the literature and the lack of a coherent source of information. A preliminary investigation of newly collected material suggested that several species of Draba, endemic or nearly so to these mountains, had not been recognized. Descriptions and relevant comparisons are given for a new combination, D. californica, and two new species, D. monoensis and D. subumbellata. Specimen citations for all taxa of Draba occurring at high elevations, roughly above …
A Synopsis Of Flacourtiaceae, David E. Lemke
A Synopsis Of Flacourtiaceae, David E. Lemke
Aliso: A Journal of Systematic and Floristic Botany
Flacourtiaceae are a large, mostly tropical, family containing more than 800 species. As circumscribed by Warburg and Gilg the family is rather heterogeneous and indeterminate. The most recent generic treatment, that of Hutchinson, represents a considerable improvement in our understanding of the family, yet Hutchinson's Flacourtiaceae still contain a number of disparate elements. This preliminary generic treatment, based upon studies of gross morphology, wood anatomy, palynology, and phytochemistry, attempts to provide a revised framework for future studies of this diverse family. Ten tribes (Berberidopsideae, Erythrospermeae, Oncobeae, Pangieae , Homalieae, Scolopieae , Prockieae, Flacourtieae, Casearieae, Bembicieae) comprising 79 genera are recognized. …
Foliar Flavonoids Of Camellia Chrysantha (Theaceae), Rob Scogin
Foliar Flavonoids Of Camellia Chrysantha (Theaceae), Rob Scogin
Aliso: A Journal of Systematic and Floristic Botany
Foliar flavonoids of Camellia chrysantha consist of two flavone C-glycosides which have chromatographic and spectroscopic properties very similar to corymboside and isocorymboside. The lack of detectable foliar flavonol glycosides contrasts with their presence in flowers of this species and may be anomalous within the genus Camellia.
New Species And Transfers Into Justicia (Acanthaceae), James Henrickson, Patricia Hiriart
New Species And Transfers Into Justicia (Acanthaceae), James Henrickson, Patricia Hiriart
Aliso: A Journal of Systematic and Floristic Botany
Justicia medrani and J. zopilotensis are described as new species while Anisacanthus gonzalezii is transferred into Justicia. The triad all have floral venation similar to red, tubular-flowered species of Justicia, though they differ from most Justicia in their tricolporate pollen with distinct pseudocolpi. In pollen and anther characters they are similar to Anisacanthus and Carlowrightia, but they differ from these in corolla vascularization and anther presentation and from Carlowrightia in corolla size. As the three taxa do not appear to represent a monophyletic group, and as Stearn has placed taxa with similar pollen into what has become a holding genus, …
Wood Anatomy Of Scytopetalaceae, Sherwin Carlquist
Wood Anatomy Of Scytopetalaceae, Sherwin Carlquist
Aliso: A Journal of Systematic and Floristic Botany
Eight wood samples representing six species in two genera of Scytopetalaceae are examined with respect to qualitative and quantitative features. Rhaptopetalum differs from Scytopetalum by having scalariform perforation plates, fiber-tracheids, longer vessel elements, and a series of features probably related to the understory status of Rhaptopetalum is compared to the emergent nature of Scytopetalum. Features ofScytopetalaceae relevant to relationships of the family include (I) scaJariform perforation plates; (2) alternate medium-sized intervascular pits; (3) scalariform vessel-parenchyma pitting; (4) diffuse-in-aggregates and scanty vasicentric axial parenchyma; (5) axial parenchyma strands subdivided in places into chains of chambered crystals; and (6) rays that are …
Leaf Phenolics Of Gunnera Manicata (Gunneraceae), Michael F. Doyle, Ron Scogin
Leaf Phenolics Of Gunnera Manicata (Gunneraceae), Michael F. Doyle, Ron Scogin
Aliso: A Journal of Systematic and Floristic Botany
Foliar material of Gunnera manicata (Gunneraceae) was examined for the presence of phenolics using standard extraction and identification techniques. Two lIavonoids, quercetin 3-0-ga1actoside and quercetin 3-0-g1ucoside and an unidentified ellagitannin are reported as occurring in G. manicata . The presence of quercetin 3-0-galactoside and a high concentration of ellagitannins offers some phytochemical support for a putative relationship between the Gunneraceae and Saxifragales.
Taxonomic Notes On Carex (Cyperaceae) Of Austral South America, Gerald A. Wheeler
Taxonomic Notes On Carex (Cyperaceae) Of Austral South America, Gerald A. Wheeler
Aliso: A Journal of Systematic and Floristic Botany
The name Carex poeppigii (sect. Echinochlaenae) is validated and a new combination in South American Carex, C. vixdentata (sect. Spirostachyae), is made here. Also, the taxonomic status of C. aueri is discussed, and this name is placed in the synonymy of C. reichei (sect. Arenariae).
Wood Anatomy Of Drimys S.S. (Winteraceae), Sherwin Carlquist
Wood Anatomy Of Drimys S.S. (Winteraceae), Sherwin Carlquist
Aliso: A Journal of Systematic and Floristic Botany
Qualitative and quantitative data are reported for seven specimens representing six varieties of the four species of Drimys generally recognized. Tracheid length and diameter are correlated both with plant size and with severity of climate: wide, long tracheids, not fluctuating in diameter seasonally, occur in Drimys of moderate elevations in subtropical latitude; narrower, shorter tracheids, becoming radially narrower briefly in latewood, occur in Drimys from higher altitudes and latitudes. Vesturing (warty layer) on the inside surface of tracheids occurs in Drimys from latitudes and altitudes where appreciable freezing is to be expected, but vesturing is absent at lower elevations and …
Tracheid Dimorphism: A New Pathway In Evolution Of Imperforate Tracheary Elements, Sherwin Carlquist
Tracheid Dimorphism: A New Pathway In Evolution Of Imperforate Tracheary Elements, Sherwin Carlquist
Aliso: A Journal of Systematic and Floristic Botany
Certain dicotyledon families characteristically have tracheids as their imperforate tracheary element type. Of these, six families are anomalous by having septate (or nonseptate but living) fiber-tracheids or libriform fibers coexisting with the tracheids in some species or genera (Austrobaileyaceae, Celastraceae, Convolvulaceae, Ericaceae, and Grossulariaceae, and Rosaceae). Data from the literature and original data on wood anatomy of these families are presented. A theory of tracheid dimorphism is developed to account for these instances of tracheids combined with fiber-tracheids or libriform fibers. According to this theory, septate or living fiber-tracheids or libriform fibers are produced in addition to tracheids, starting with …
Adaptability Of Scanning Electron Microscopy To Studies Of Pollen Morphology, John J. Skvarla, John R. Rowley, William F. Chissoe
Adaptability Of Scanning Electron Microscopy To Studies Of Pollen Morphology, John J. Skvarla, John R. Rowley, William F. Chissoe
Aliso: A Journal of Systematic and Floristic Botany
We have explored methods to achieve excellent results in study of the pollen grain wall by using only one electron microscope, the scanning electron microscope (SEM). While the secondary electron imaging mode, the most common in use, has great value in characterizing the exine surface it is possible to obtain a more comprehensive representation of pollen grain walls by expanding the capability of the secondary mode and making use of backscatter and transmission imaging detectors. In this way information is obtained about internal exine features that are likely to be more stable phylogenetically than the generally late-to-form surface structure. We …
A New Method Of Calculating The Wing Area Of Bats, B.R. Blood, Donald A. Mcfarlane
A New Method Of Calculating The Wing Area Of Bats, B.R. Blood, Donald A. Mcfarlane
WM Keck Science Faculty Papers
Wing area is a parameter important to any study of chiropteran flight behaviour (Struthsaker 1961 ; Findley et al. 1972 ; Lawlor 1973), because it is a necessary component for the calculation of aspect ratio and wing loading. Bats possessing high aspect ratio wings usually display swift and steady flight, often at high altitudes. Bats that possess low aspect ratio wings usually display slower, more manouverable flight and often fly at lower altitudes (Findley 1972 ; Findley et al. 1972 ; Mortensen 1977 ; Vaughan 1970). However, despite the importance of wing area, no-one has published a simple, yet accurate, …
An Abbreviated Catalogue Of The Australian Bats In The Collections Of The Natural History Museum Of Los Angeles County, California, Usa., Donald A. Mcfarlane, Kenneth E. Stager
An Abbreviated Catalogue Of The Australian Bats In The Collections Of The Natural History Museum Of Los Angeles County, California, Usa., Donald A. Mcfarlane, Kenneth E. Stager
WM Keck Science Faculty Papers
The Natural History Museum of Los Angeles County (LACM) is the repository for some 90,000 mammal specimens of world-wide provenance, and is particularly strong in its collections of Chiroptera. As the result of numerous collecting expeditions undertaken by one of us (KES) since 1954, a substantial representation of Australian bats has been assembled. It is our intent in this paper to bring these collections to the attention of our Australian colleagues, so that this biogeographic and systematic resource might be more widely used.
Plant Taxonomy In My Time, Lincoln Constance
Plant Taxonomy In My Time, Lincoln Constance
Aliso: A Journal of Systematic and Floristic Botany
No abstract provided.
Wood Anatomy Of Acanthaceae: A Survey, Sherwin Carlquist, Scott Zona
Wood Anatomy Of Acanthaceae: A Survey, Sherwin Carlquist, Scott Zona
Aliso: A Journal of Systematic and Floristic Botany
Qualitative and quantitative wood features are reported for 38 species representing 22 genera, including the scandent genera Mendoncia and Thunbergia. Woods of Acanthaceae are characterized by relatively narrow vessels with simple perforation plates and alternate lateral wall pitting, septate libriform fibers, scanty vasicentric axial parenchyma, rays both multiseriate and uniseriate, erect ray cells abundant in rays (some species rayless or near-rayless), numerous small crystals or cystoliths in ray cells in a few genera (first documented reports of both characters in woods of Acanthaceae), and nonstoried structure. This constellation of features is very closely matched by woods of Gesneriaceae, Scrophulariaceae, Pedaliaceae, …
Rosaceous Chamaebatiaria-Like Foliage From The Paleogene Of Western North America, Jack A. Wolfe, Wesley Wehr
Rosaceous Chamaebatiaria-Like Foliage From The Paleogene Of Western North America, Jack A. Wolfe, Wesley Wehr
Aliso: A Journal of Systematic and Floristic Botany
Chamaebatiaria and Chamaebatia, two characteristic genera of the Californian floristic province, are traditionally placed in different subfamilies of Rosaceae , Spiraeoideae and Rosoideae, respectively. Analysis of the foliar and reproductive characters of the extant species of these genera indicates that the two genera could be closely related and the assignment of Chamaebatia to Rosoideae invalid. Fossil leaves of lineages of both genera occur in the Paleogene montane floras of the Rocky Mountain region and provide evidence that the two lineages diverged from a common ancestor in the Eocene. The common ancestor probably was adapted to sunny habitats in mesic coniferous …