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Articles 1 - 11 of 11
Full-Text Articles in Life Sciences
The Palms (Arecaceae) Of Sonora, Mexico, Richard S. Felger, Elaine Joyal
The Palms (Arecaceae) Of Sonora, Mexico, Richard S. Felger, Elaine Joyal
Aliso: A Journal of Systematic and Floristic Botany
This publication is an account of the palms (Arecaceae) in the state of Sonora in northwestern Mexico. Six native palm species in three genera are recorded for Sonora: Brahea with four species, and Sabal and Washingtonia each with one species. Relationships and taxonomy within Brahea, especially B. elegans, remain unresolved. Brief botanical descriptions, taxonomic synopses, local names, identification keys, conservation status and recommendations, and distributional and ethno- botanical information are provided for each species. Basionyms and types are cited. Distributions are documented with citations of nearly all herbarium specimens known to us from Sonora. Many palm populations in …
Wood Anatomy Of Agdestis (Caryophyllales): Systematic Position And Nature Of Successive Cambia, Sherwin Carlquist
Wood Anatomy Of Agdestis (Caryophyllales): Systematic Position And Nature Of Successive Cambia, Sherwin Carlquist
Aliso: A Journal of Systematic and Floristic Botany
Features in which Agdestis differs from Phytolaccaceae s. s. include presence of both libriform fibers and vasicentric tracheids (rather than one or the other); bands and strands of thin-walled apotracheal parenchyma (in addition to paratracheal scanty parenchyma}, and raylessness (also reported for Bougainvillea of Nyctaginaceae, a family close to Phytolaccaceae). Dimorphism in vessel diameter in Agdestis (narrow vessels like libriform fibers in diameter) is attributable to the lianoid habit. Packets of crystals coarser than typical for raphides occur idioblastically in Agdestis, as do raphides in Phytolacca. ln Phytolacca and in other Phytolaccaceae, one finds an unusual feature that …
Wood And Bark Anatomy Of Schisandraceae: Implications For Phylogeny, Habit, And Vessel Evolution, Sherwin Carlquist
Wood And Bark Anatomy Of Schisandraceae: Implications For Phylogeny, Habit, And Vessel Evolution, Sherwin Carlquist
Aliso: A Journal of Systematic and Floristic Botany
Qualitative and quantitative features are reported for mature wood and bark of two species of Kadsura and five species of Schisandra. Newly reported for the family are predominance of simple perforation plates (all species); presence of pit membrane remnants in vessels of first-formed secondary xylem; two to three series of pits per facet on tracheids; diffuse axial parenchyma (Kadsura); multiseri- ate rays more than three cells wide at the widest point (all species); ethereal oil cells in axial xylem; and certain details of comparative bark anatomy. Differences in wood anatomy between Illiciaceae and Schisandraceae are nearly all …
An Expanded Circumscription Of Bouteloua (Gramineae: Choridoideae): New Combinations And Names, J. Travis Columbus
An Expanded Circumscription Of Bouteloua (Gramineae: Choridoideae): New Combinations And Names, J. Travis Columbus
Aliso: A Journal of Systematic and Floristic Botany
Cladistic analysis of nuclear ribosomal and chloroplast DNA sequences has revealed that the New World grass genus Bouteloua (Chloridoideae) is not monophyletic. Indeed, some species of Bouteloua are more closely related to species in other genera than to congeners. The problem was dealt with by expanding the circumscription of Bouteloua to include species formerly positioned in the satellite genera Buchloe (1 species), Buchlomimus/em> (1), Cathestecum/em> (4), Cyclostachya/em> (1), Griffithsochloa (1), Opizia (2), Pentarrhaphis (3), Pringleochloa (1), and Soderstromia(1). Thirteen new combinations and names were necessary. As here circumscribed, Bouteloua is monophyletic and comprises 57 species.
Glume Absence In The Orcuttieae (Gramineae: Chloridoideae) And A Hypothisis Of Intratribal Relationships, Eric H. Roalson
Glume Absence In The Orcuttieae (Gramineae: Chloridoideae) And A Hypothisis Of Intratribal Relationships, Eric H. Roalson
Aliso: A Journal of Systematic and Floristic Botany
This study addresses glume absence in tribe Orcuttieae. In Orcuttia califomica, O. inaequalis, and O. viscida, all spikelets possess two glumes except for the terminal spikelet of the inflorescence, which lacks both glumes. In O. pilosa and Tuctoria greenei the terminal spikelet lacks only the first (proximal) glume, whereas in O. tenuis, T. fragilis, and T. mucronata both glumes are developed on all spikelets. This is the first report of glume absence in species of Orcuttieae other than Neostapfia colusana, which has been long reported to lack both glumes on all spikelets. A hypothesis …
Laboulbeniales On Semiaquatic Heteroptera. Viii. Monandromyces, A New Genus Based On Autophagomeces Microveliae(Laboulbeniales), Richard K. Benjamin
Laboulbeniales On Semiaquatic Heteroptera. Viii. Monandromyces, A New Genus Based On Autophagomeces Microveliae(Laboulbeniales), Richard K. Benjamin
Aliso: A Journal of Systematic and Floristic Botany
A new genus of Laboulbeniales (Laboulbeniaceae: Stigmatomycetinae), Monandromyces, was described. Its type species, M. hemipteralis, was based on Autophagomyces hemipteralis. The latter, which parasitizes a riparian bug, a species of Microvelia (Heteroptera: Veliidae), was characterized by Roland Thaxter in 1931. Ten new species of Monandromyces- taken from members of three genera of Veliidae-were described as follows: M. australis, M. falcatus, M. polhemorum, M. protuberans, M. tenuistipitis, and M. umbonatus (on Microvelia spp.); M. neoalardi (on Neoalardus sp.); and M. elongates, M. longispinae, and M. pseudoveliae (on Pseudovelia spp.). Keys …
Vascular Flora Of The Liebre Mountains, Western Transverse Ranges, California, Steve Boyd
Vascular Flora Of The Liebre Mountains, Western Transverse Ranges, California, Steve Boyd
Aliso: A Journal of Systematic and Floristic Botany
The Liebre Mountains form a discrete unit of the Transverse Ranges of southern California. Geographically, the range is transitional to the San Gabriel Mountains, Inner Coast Ranges, Tehachapi Mountains, and Mojave Desert. A total of 1010 vascular plant taxa was recorded from the range,representing 104 families and 400 genera. The ratio of native vs. nonnative elements of the flora is 4:1, similar to that documented in other areas of cismontane southern California. The range is noteworthy for the diversity of Quercus and oak-dominated vegetation. A total of 32 sensitive plant taxa (rare, threatened or endangered) was recorded from the range.
Articulated Cork In Calotropis Procera (Asclepiadaceae), Simcha Lev-Yadun
Articulated Cork In Calotropis Procera (Asclepiadaceae), Simcha Lev-Yadun
Aliso: A Journal of Systematic and Floristic Botany
The cork of the small tree. Calotropis procera, which grows in a very hot district of Israel, is remarkable for its thickness and brittleness. The cork of the stems and large branches is composed of longitudinal ridges that extend over several internodes. The cork ridges have deep fissures around the circumference at almost every node. I propose that these nodal fissures in the cork serve as joints for two functions: (1) to prevent breakage of the fragile cork layer when branches bend under wind stress, and (2) to allow thermal expansion while avoiding tissue cracking on extremely hot days, …
Potential Utility Of Chloroplast Trnl (Uaa) Gene Intron Sequences For Inferring Phylogeny In Scrophulariaceae, C. Edward Freeman, Ron Scogin
Potential Utility Of Chloroplast Trnl (Uaa) Gene Intron Sequences For Inferring Phylogeny In Scrophulariaceae, C. Edward Freeman, Ron Scogin
Aliso: A Journal of Systematic and Floristic Botany
Whereas chloroplast DNA-derived sequence data from protein coding regions have been utilized successfully at many taxonomic levels in recent years, sequences which are variable enough to allow for efficient phylogenetic inference (maximum information with relatively low sequencing costs and effort) at the subfamilial level huve been few. Sequence data were obtained in this study from a noncoding region, the trnL (UAA) gene intron, from a selection of taxa from the Scrophulariaceae and closely related families (representing 41 species in 26 genera). Groups of species from commonly recognized tribes and subtribes were included to determine if these taxa were grouped together …
Eleocharis Yecorensis (Cyperaceae), A New Species Of Spike-Sedge From México, Eric H. Roalson
Eleocharis Yecorensis (Cyperaceae), A New Species Of Spike-Sedge From México, Eric H. Roalson
Aliso: A Journal of Systematic and Floristic Botany
Eleocharis (Cyperaceae) includes approximately 200 species and is particularly diverse in the New World. A newly discovered species of subgenus Limnochloa is described from the states of Sonora and Mexico, Mexico. Eleocharis yecorensis is related to E. acutangula, E. mutata. and E. quadrangulata and can be distinguished from these species by its five-angled culms, obdeltoid achenes. and narrow neck between tubercle and achene body. In addition. E. yecorensis possesses root storage structures similar to those found in the Chinese water chestnut, Eleocharis dulcis.
A Floristic Study Of Sugarloaf Ridge State Park, Sonoma County, California, Frederica S. Bowcutt
A Floristic Study Of Sugarloaf Ridge State Park, Sonoma County, California, Frederica S. Bowcutt
Aliso: A Journal of Systematic and Floristic Botany
A ist of 400 vascular plants was compiled for Sugarloaf Ridge State Park, a 1142 hectare (2820 acre) park in the outer North Coast Ranges within Sonoma County and adjacent western Napa County, California. Relatively undisturbed stands of native perennial bunchgrasses occur the understory In portions of both the oakwood land and the mixed evergreen forest. Grasslands on serpentine in the park are typically dominated by Nassella. One of the sttlte's eastentmost coast redwood forests occurs in the park. Nonnative Centaurea solstitialis rapidly invades annual grasslands and other disturbed in the park. The California Oepanment of and Recreation (DPR) …