Organ Pipe Cactus,Stenocereus thurberi, with Fleshy Leaves on Spherical Short-Shoots that Have Indeterminate Growth

Haseltonia ◽  
2017 ◽  
Vol 23 ◽  
pp. 117-125
Author(s):  
Root Gorelick
Keyword(s):  
Indeterminate Growth ◽  
Stenocereus Thurberi ◽  
Organ Pipe ◽  
Short Shoots

Arthropod diversity in necrotic tissue of three species of columnar cacti (Cactaceae)

2001 ◽  
Vol 133 (3) ◽  
pp. 301-309 ◽  
Author(s):  
Sergio Castrezana ◽  
Therese Ann Markow
Keyword(s):  
Chemical Composition ◽  
North America ◽  
Sonoran Desert ◽  
Abiotic Factors ◽  
Necrotic Tissue ◽  
Columnar Cacti ◽  
Stenocereus Thurberi ◽  
Pachycereus Pringlei ◽  
Organ Pipe ◽  
Host Characteristics

AbstractWe compared the insect and arachnid species found in spring and summer samples of necrotic tissue of three species of columnar cacti, cardón [Pachycereus pringlei (S. Watson) Britten and Rose], organ-pipe (Stenocereus thurberi Buxb.), and senita [Lophocereus schottii (Engelm.) Britten and Rose] (all Cactaceae), endemic to the Sonoran Desert of North America. A total of 9380 arthropods belonging to 34 species, 23 families, 10 orders, and 2 classes were collected in 36 samples. Arthropod communities differed in composition among host cacti, as well as between seasons. These differences may be a function of variation in host characteristics, such as chemical composition and abiotic factors, such as water content or temperature.

scholarly journals Accumulation of Silicon in Cacti Native to the United States: Characterization of Silica Bodies and Cyclic Oligosiloxanes in Stenocereus thurberi, Opuntia littoralis, Opuntia ficus-indica, and Opuntia stricta

2014 ◽  
Vol 9 (6) ◽  
pp. 1934578X1400900 ◽  
Author(s):  
Cynthia R. Wright ◽  
Emanuel A. Waddell ◽  
William N. Setzer
Keyword(s):  
United States ◽  
Essential Oils ◽  
The United States ◽  
Gas Chromatography Mass Spectrometry ◽  
Opuntia Ficus Indica ◽  
National Monument ◽  
Stenocereus Thurberi ◽  
Organ Pipe ◽  
Santa Catalina Island

Four different cactus species growing in the United States, Stenocereus thurberi growing in Organ Pipe Cactus National Monument, Arizona, Opuntia littoralis and Opuntia ficus-indica, growing on Santa Catalina Island, California, and Opuntia stricta, growing in northern Alabama, were examined for the presence of silica bodies (opaline phytoliths). Silica bodies were found in all four of these cactus species, parallelepiped-shaped crystals in S. thurberi, and starburst-shaped crystalline structures in the three Opuntia species. In addition, the essential oils of the four cactus species were obtained by hydrodistillation and analyzed by gas chromatography – mass spectrometry. To our surprise, S. thurberi, O. littoralis, and O. ficus-indica (but not O. stricta) essential oils contained cyclic oligosiloxanes. To our knowledge, cyclic oligosiloxanes have not been previously found as essential oil components.

Initial effects of UV-B radiation on stem surfaces of Stenocereus thurberi (organ pipe cacti)

2001 ◽  
Vol 46 (2) ◽  
pp. 181-187 ◽  
Author(s):  
Lance S. Evans ◽  
Joseph H. Sullivan ◽  
Marigrace Lim
Keyword(s):  
Stenocereus Thurberi ◽  
Organ Pipe

Ginkgophytes of the Ul’ya flora (the Ul’ya depresiion, the Okhotsk-Chukotka volcanogenic belt)

Palaeobotany ◽  
2016 ◽  
Vol 7 ◽  
pp. 80-95 ◽  
Author(s):  
L. B. Golovneva
Keyword(s):  
New Species ◽  
Early Cretaceous ◽  
Late Cretaceous ◽  
Middle Part ◽  
Leaf Length ◽  
Volcanogenic Belt ◽  
Short Shoots ◽  
Volcanogenic Deposits

The Ul’ya flora comes from the Coniacian volcanogenic deposits of the Amka Formation (the Ul'ya depression, southern part of the Okhotsk-Chukotka volcanogenic belt). Ginkgoaleans are diverse in this flora and represented by three genera: Ginkgo, Sphenobaiera and Baiera. All specimens have no cuticle and were assigned to morphotaxa. Genus Ginkgo includes two species: G. ex gr. adiantoides (Ung.) Heer with entire leaves and G. ex gr. sibirica Heer with dissected leaves. Genus Sphenobaiera also consists of two species: S. ex gr. longifolia (Pom.) Florin with 4–8 leaf lobes and S. ex gr. biloba Prynada with two leaf lobes. Genus Baiera is represented by new species B. lebedevii Golovn., sp. nov.Leaves of this species are 25–30 cm long and 13–16 cm wide, narrowly wedge-shaped with flat slender petiole, dichotomously dissected 4–5 times into linear segments 3–6 mm wide with 6–12 veins. The length of ultimate segments is equal to about a half of leaf length. Leaves attached spirally to ovoid short shoots about 2 cm long. Among the Late Cretaceous floras similar diversity of ginkgoaleans was recorded only in the Turonian-Coniacian Arman flora from middle part of the Okhotsk-Chukotka volcanogenic belt (Herman et al., 2016). Four species of ginkgoaleans from the Ul’ya flora (except G. ex gr. adiantoides) are considered as the Early Cretaceous relicts.

The Baroque Clarinet and Chalumeau

2020 ◽  
Author(s):  
Albert R. Rice
Keyword(s):  
18Th Century ◽  
Clarinet Music ◽  
History Of ◽  
Organ Pipe

The second edition of The Baroque Clarinet (1992) is a history of the clarinet and chalumeau from antiquity to 1760 in six chapters: “Origins of the Chalumeau,” “Music for the Chalumeau,” “The Earliest Clarinets,” “Playing Techniques for the Baroque Clarinet,” “Music for the Baroque Clarinet,” and “Baroque Clarinet in Society.” There are five appendices: four checklists of extant chalumeaux, extant clarinets, chalumeau music and sources from 1694 to 1780, clarinet music and sources from about 1715 to 1760; and a fifth of chalumeau and clarinet concerts, rehearsals, and clarinets for purchase in newspaper advertisements from 1718 to 1760. The second edition has significant additions of makers, players, music, and iconography, that last in a chapter called “The Baroque Clarinet in Society.” Topics discussed include single-reed instruments in Egyptian antiquity and from the 10th through the 17th centuries; the mock trumpet; chalumeaux during the 17th and 18th centuries; Jacob Denner’s chalumeaux and clarinets; an organ pipe that sounds like a chalumeau; chalumeau players; chalumeau descriptions from the mid-18th century; later documented chalumeau makers; chalumeau reproductions; how and why Johann Christoph Denner improved the chalumeau and invented the clarinet, based on previous studies of mechanical inventions; chalumeau and clarinet music and composers; and the Baroque clarinet’s use by traveling musicians, in court and aristocratic music, church and civic music, and military music.

Paper 7: Control of Variable-Discharge Pumps and Dangers of Pipeline Resonance

1966 ◽  
Vol 181 (1) ◽  
pp. 144-174
Author(s):  
B. J. Cooper ◽  
D. Hartland ◽  
R. Lawson ◽  
A. M. Stone ◽  
R. D. Tyler
Keyword(s):  
Power Input ◽  
Small Region ◽  
Significant Loss ◽  
Pump Efficiency ◽  
Positive Slope ◽  
Simple Criterion ◽  
Wide Range ◽  
Resonant Instability ◽  
Organ Pipe ◽  
Computer Studies

The discharge and power input of Deriaz mixed-flow pumps and pump turbines can be controlled over a wide range without significant loss in efficiency by movement of the blades. The attainment of the highest pump efficiency involves a small region of positive slope in the head discharge graph. This paper examines the limitations of designing pumps which do not exhibit positive slope and the problems of governing if a positive-slope region is accepted. It is shown that operation in the positive-slope region can introduce a serious organ-pipe resonant instability in the pipeline. A simple criterion to determine whether or not such oscillations will occur is given. This stability criterion involves the dynamic characteristics of both the pump and the pipeline. Finally, computer studies of a particular Deriaz pump installation are presented. These underline the severity of the situation should resonance develop and show how it can be avoided by the use of an air bottle of appropriate design.

SEASONAL GROWTH CHARACTERISTICS OF LONG AND SHORT SHOOTS OF TAMARACK

1967 ◽  
Vol 45 (9) ◽  
pp. 1643-1651 ◽  
Author(s):  
J. Johanna Clausen ◽  
T. T. Kozlowski
Keyword(s):  
Seasonal Changes ◽  
Stem Elongation ◽  
Growth Characteristics ◽  
Weight Increase ◽  
Stem Length ◽  
Larix Laricina ◽  
Seasonal Growth ◽  
Long Shoots ◽  
Short Shoots ◽  
Food Reserves

Tamarack (Larix laricina (DuRoi) K. Koch) produces long shoots which bear two kinds of needles. Early needles are present in the bud and elongate rapidly after budbreak. Late needles, few of which are present in the bud, elongate later than early needles. Short shoots bear early needles only, and stem length seldom exceeds 1 mm. Seasonal changes in length and weight of needles and stems of both shoot types were measured. In long shoots, 75% of stem elongation, more than 70% of stem weight increment, and 65–70% of late needle elongation occurred after early needles were full-sized. Stem and late needle elongation ceased simultaneously, after which time needle weight decreased and stem weight increased. Early needles probably drew on food reserves while developing, and then themselves contributed to stem and late needle elongation. Final stem weight increase probably used photosynthate from both late and early needles of the current year.Shading of current and last year's needles showed that shoots in which photosynthesis was interrupted in this way produced shorter, lighter-weight stems than did control shoots.

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