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Chusquea septentrionalis Ruiz-Sanchez, Art. Castro & Clark
No full textChusquea septentrionalis emend. Ruiz-Sanchez, Art. Castro & Clark TYPE:— MEXICO. Durango. Municipality Pueblo Nuevo: Santa Bárbara, Santa Bárbara State Park to the end of the interpretative trail, 3 km from the bifurcation to the Puentecillas State Park, 2724 m, 15 Dec 2015 (sterile), A. Castro-Castro and J. G. González-Gallegos 4241 (holotype: CIIDIR!; isotypes: IBUG!, ISC!, MEXU!). Description:—Rhizomes pachymorph, short-necked. Culms 1.5–3.0 m tall, 10–20 mm in basal diameter, erect, somewhat arching toward the apices. Internodes 80–170 mm long, 15–36 per culm, terete, glabrous, green to dark green purple, hollow, the walls 3–5 mm thick, the lacuna occupying 50% of the total diameter. Culm leaves 100–190 mm long, extending along the whole internode and overlapping the next node, persistent and disintegrating on the culm, glabrous; sheaths 90–140 mm long, rectangular with a strongly convex apex, 3.3–9.0 times as long as the blade, with margins ciliolate from white cilia; blades 10–42 mm long, triangular, erect, persistent, short mucronate at apex, with margins finely ciliate, abaxially and adaxially glabrous becoming adaxially sparsely pubescent toward the apex; girdle absent; inner ligule ca. 0.05 mm long, ciliate. Nodes at mid culm with the central bud slightly larger than the subsidiaries, triangular; subsidiary buds 3–6 per complement, axillary, closely adjacent and linearly arranged in 1 row, with the base of the buds arising about 2 mm above the nodal line; prophylls with ciliate margins; nodal line more or less horizontal, supranodal ridge present and prominent. Branching intravaginal; 3–6 branches per node, growing almost parallel to the main culm, 130–400 mm long, 1–2 mm in diameter, rebranching (second order) and developing a single branch. Foliage leaves 3–9 per complement; sheaths glabrous, with entire margin; blades 90–165 mm long, 5–12 mm wide, L:W 13–21; blades adaxially and abaxially strongly tessellate, glabrous, attenuate at base, subulate at apex, with finely scabrous margin; pseudopetioles 1.5–3.0 mm long, adaxially and abaxially glabrous; inner ligules 5–10 mm long, well developed, clasping the branch, abaxially glabrous; outer ligule a ciliate irregular rim 0.2–1.0 mm long. Synflorescences 45–90 mm long, 1–15 mm wide, narrow, somewhat congested, not fully exserted from the subtending sheath; rachis slightly sinuate, angular, slightly scabrous; branches appressed, but not strongly so, ascending, 10–20 mm long, angular, scabrous; pedicels 1–5(–7) mm long, angular, scabrous. Spikelets (6.2–)7.2–8.8(–10.8) mm long, 1–1.3 mm wide, glabrous, laterally compressed. Glumes I and II ovate, obtuse, glabrous, enervate; glume I (0.2–)0.6– 1(–1.4) mm long, 1/50–1/5 the spikelet length; glume II 0.6–1.2 mm long, 1/15–1/4 the spikelet length. Glumes III and IV scabrous, awned, margin entire, ciliate to the apex; glume III including the awn (4.4–)4.6–6.8(–7.2) mm long, 5-nerved, the awn (0.6–) 1.2–2.2 mm, 1/4–3/4 the spikelet length; glume IV including the awn (5.6–)5.8–7.8(–8.2) mm long, 3–4-nerved, the awn 0.6–1.2 mm long, 1/2–9/10 the spikelet length, 4–5-nerved. Lemmas (6–) 8–9 mm long, 7–nerved, green, scabrous, awned, margin ciliate toward the apex; awn 0.6–0.8 mm long, 5-nerved. Paleas (6–) 8–9 mm long, 2–nerved, scabrous; nerves scabrous, apex biapiculate, the sulcus scabrous. Lodicules 3, membranaceous, 0.6–0.8 mm long, glabrous, hyaline, margin entire, apex truncate. Stamens and stigmas not seen. Fruit not seen (Fig. 4). Habitat and distribution:— Chusquea septentrionalis was described from Durango state, known from three localities (Ruiz-Sanchez et al. 2017). This species inhabits coniferous forest growing from 2333–2729 m (including elevation data from the new records first reported here). We recorded the presence of this species far north (25°39’49.17’’N, 107°0’25.44’’W) in Sinaloa state from the type locality (Fig. 2, 5), making this species unquestionably the northernmost of the genus. Comparison:—Synflorescences and spikelets of C. septentrionalis are more similar to C. bilimekii than to C. perotensis (Table 2). Synflorescences are congested-paniculate in C. septentrionalis and C. bilimekii and openpaniculate in C. perotensis. Further comparisons will be between C. septentrionalis and C. bilimekii. Glumes I and II are glabrous in C. septentrionalis and abaxially pubescent in C. bilimekii. Glumes III and IV are abaxially scabrous in C. septentrionalis and pubescent in C. bilimekii. Glumes III and IV are awned in C. septentrionalis, but are subulate and apiculate in C. bilimekii. Lemmas are shorter (6–) 8–9 mm and abaxially scabrous in C. septentrionalis, and these are longer (9.6–10.1 mm) and pubescent in C. bilimekii (Table 2). Etymology:—The specific epithet refers to this species having the northernmost distribution among the members of Chusquea subg. Swallenochloa . Phenology:—The first known flowering record for this species was collected during the summer of 2019 (A. Castro-Castro et al. 4600). All flowers examined from this specimen, however, were past mature and had no fruits. Specimens examined:— Durango: Durango municipality, Salto del Agua Llovida, km 58 de la brecha Navios-El Regocijo-San Isidro-Molinillos, a partir del km 72 de la carretera Méx. 40 Durango-Mazatlán, 23°32’15.6’’N, 104°15’15.5’’W, 2333 m, 10 julio 2019, (fl), A. Castro-Castro et al. 4600 (CIIDIR, IBUG); Pueblo Nuevo, La Ciudad, Parque Ecoturístico Mexiquillo, alrededores de la cascada, 23°42’5’’N, 105°40’14.9’’W, 2551 m elevación, 8 agosto 2019, A. Castro-Castro et al. 4497 (CIIDIR); parque la Pirámide, camino en cañada, paralelo al primer túnel, carretera Durango-Mazatlán, 23°43’5.09’’N, 105°31’2.39’’W, 2729 m, 27 agosto 2021, S.E. Centeno & R. Machado 152 (CIIDIR). Sinaloa: Badiraguato, Santa Gertrudis, camino a Santa Gertrudis-Alisitos-La Herradura, 25°39’49.17’’N, 107°0’25.44’’W, 2560 m elevación, 1 noviembre 2020, E.I. Rojas-Aguilar & M.A. González-Bernal 398a (CIIDIR, IBUG).Published as part of Ruiz-Sanchez, Eduardo, Castro-Castro, Arturo & Clark, Lynn G., 2022, A new informal group in Chusquea subg. Swallenochloa (Poaceae: Bambusoideae: Bambuseae) and emended descriptions for the Mexican endemics C. enigmatica and C. septentrionalis, pp. 47-58 in Phytotaxa 554 (1) on pages 51-55, DOI: 10.11646/phytotaxa.554.1.3, http://zenodo.org/record/680977
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American G.I. Forum Dr. George I. Sanchez (photograph)
No full textAmerican G.I. Forum Dr. George I. Sanchez
Nathalie Fuica Sanchez
No full textAvgangsarbeid av Nathalie Fuica Sanchez, MA billedkunst. Essay "Uten tittel (Forberedelser til å kunne yte motstand når det trengs)" og fotografier av kunstverk i avgangsutstillingen Plural Plur. Fotograf: Istvan Vira
UT Prof G. I. Sanchez dies, page 1
No full textPage one of a newspaper clipping about the passing of Dr. George Isadore Sanchez y Sanchez Thursday, April 6, 1972
UT Prof G. I. Sanchez dies, page 2
No full textPage two of a newspaper clipping about the passing of Dr. George Isadore Sanchez y Sanchez Thursday, April 6, 1972
Weakly stratified laminar flow past normal flat plates
No full textNumerical computations of the steady, two-dimensional, incompressible, uniform velocity but stably stratified flow past a normal flat plate (of unit half-width) in a channel are presented. Attention is restricted to cases in which the stratification is weak enough to avoid occurrence of the gravity wave motions familiar in more strongly stratified flows over obstacles. The nature of the flow is explored for channel half-widths, H, in the range 5 [less-than-or-eq, slant] H [less-than-or-eq, slant] 100, for Reynolds numbers, Re, (based on body half-width and the upstream velocity, U) up to 600 and for stratification levels between zero (i.e. neutral flow) and the limit set by the first appearance of waves. The fourth parameter governing the flow is the Schmidt number, Sc, the ratio of the molecular diffusion of the agent providing the stratification to the molecular viscosity. For cases of very large (in the limit, infinite) Sc a novel technique is used, which avoids solving the density equation explicitly. Results are compared with the implications of the asymptotic theory of Chernyshenko & Castro (1996) and with earlier computations of neutral flows over both flat plates and circular cylinders. The qualitative behaviour in the various flow regimes identified by the theory is demonstrated, but it is also shown that in some cases a flow zone additional to those identified by the theory appears and that, in any case, precise agreement would, for most regimes, require very much higher Re and/or H. Some examples of multiple (i.e. non-unique) solutions are shown and we discuss the likelihood of these being genuine, rather than an artefact of the numerical scheme.<br/
U.S. Supreme Court holding in Bruce King vs. Frank I. Sanchez
No full textHolding #81-2385 of the U.S. Supreme Court in Bruce King vs. Frank I. Sanchez, October term 198
FIGURE 4. Chusquea septentrionalis. A. Synflorescence. B. Flowering branch showing persistent lower glumes. C. Spikelet. D in A new informal group in Chusquea subg. Swallenochloa (Poaceae: Bambusoideae: Bambuseae) and emended descriptions for the Mexican endemics C. enigmatica and C. septentrionalis
No full textFIGURE 4. Chusquea septentrionalis. A. Synflorescence. B. Flowering branch showing persistent lower glumes. C. Spikelet. D. Lower glumes (I, II). E. Upper glumes (III, IV). F. Lemma (right) and palea (left). Based on A. Castro-Castro et al. 4600. Illustration by Juvenal Aragón Parada.Published as part of Ruiz-Sanchez, Eduardo, Castro-Castro, Arturo & Clark, Lynn G., 2022, A new informal group in Chusquea subg. Swallenochloa (Poaceae: Bambusoideae: Bambuseae) and emended descriptions for the Mexican endemics C. enigmatica and C. septentrionalis, pp. 47-58 in Phytotaxa 554 (1) on page 53, DOI: 10.11646/phytotaxa.554.1.3, http://zenodo.org/record/680977
MI Sanchez Aniorte Publications
No full textLaser processing from Photovoltaics, semiconductor, microelectronics devices to driven proton acceleration. In this repository, there are some experimental studies demonstrating the effectiveness of the laser in a wide variety of application
MI Sanchez Aniorte Publications
No full textLaser processing from Photovoltaics, semiconductor, microelectronics devices to driven proton acceleration. In this repository, there are some experimental studies demonstrating the effectiveness of the laser in a wide variety of application
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