Otatea reynosoana, Ruiz-Sanchez & Clark

García-Martínez, Miguel A., Terrazas, Teresa, Sánchez, Daniel, Reyes, Pablo Carrillo- & Ruiz-Sanchez, Eduardo, 2023, Culm anatomy of the genus Otatea (Poaceae, Bambusoideae, Bambuseae, Guaduinae) as a contribution to Mexican species identification, Phytotaxa 609 (2), pp. 75-102 : 88

publication ID	https://doi.org/10.11646/phytotaxa.609.2.1
DOI	https://doi.org/10.5281/zenodo.8274494
persistent identifier	https://treatment.plazi.org/id/03AD87BF-FFE5-0C0B-FF45-2ACBFED2FC17
treatment provided by	Plazi (2023-08-22 09:30:37, last updated 2024-11-26 08:52:37)
scientific name	Otatea reynosoana
status

Treatment

Otatea reynosoana View in CoL View at ENA ( Fig. 10 View FIGURE 10 )

Material examined: — MEXICO. Michoacán: Morelia, Filtros Viejos, on the banks of the Chiquito river , 19°40’35.2”N, 101°9’13.7”W, 1947 m, 3 February 2020, E GoogleMaps . Ruiz-Sanchez & M. A . García-Martínez 649 ( IBUG!) .

Culm anatomy description: —Culm hollow, the lacuna occupying <50% of the total diameter. Epidermis with a layer of square to rectangular thick-walled cells, 11 µm length, with occasional rectangular silica bodies on top ( Fig. 10C View FIGURE 10 ). Cortex with 3–4 layers of thick-walled rounded cells, the outer narrower, 27 µm length, with dark staining deposit ( Fig. 10C View FIGURE 10 ). Vascular bundles in 5–6 alternating cycles ( Fig. 10C View FIGURE 10 ). Peripheral, transitional, and central vascular bundles surrounded by a sclerenchyma sheath defining their contour ( Figs. 10D–F View FIGURE 10 ). Depressed central vascular bundles, 249 × 351 μm; two round shaped metaxylem vessels, 80 × 88 μm; phloem with sieve tubes and companion cells located between two metaxylem vessels on the upper level, 56 × 91 µm; sieve tubes 19 × 21 µm ( Fig. 10F View FIGURE 10 ). Scarce amorphous silica bodies embedded along the periphery of vascular bundles occupying cellular spaces covering a mean area of 78 µm 2. Sporadic conical silica bodies across the ground tissue occupying intercellular spaces covering a mean area of 11 µm 2 ( Fig. 10B View FIGURE 10 ).

Figures

FIGURE 10. Culm cross section of Otatea reynosoana. A. Cross section general view. B. Parenchymatous ground tissue with sporadic conical silica bodies. C. Epidermis and cortex. D. Peripheral vascular bundle. E. Transitional vascular bundle. F. Central vascular bundle. Abbreviations:co, cortex; ep, epidermis; fs, fiber sheath; mx, metaxylem; pa, parenchyma; ph, phloem; px, protoxylem; sc, sclerenchyma; si, silica bodies.