Vellozia glauca Pohl

Vellozia glauca Pohl

Vellozia glauca Pohl, Pl. Bras., 1:125, pl. 100, 1827.—Seubert in Martius, Fl. Bras., 3(1):79, 1847.—L. B. Smith, Contr. U.S. Nat. Herb., 35:264, 1962.—Ayensu, Smithsonian Contr. Bot., 15:25, figs. 3e–f, 11d–f, 1974.

Vellozia glauca var. genuina Seubert in Martius, Fl. Bras., 3(1):79, 1847.

Vellozia hamosa Pohl ex Seubert in Martius, Fl. Bras., 3(1):79, 1847 [nomen].

TYPE.—Sandy summits, near Aldeia Carretao de Pedro Terceiro, Goiás, Brazil, Pohl s n (M, holotype; n v).

DISTRIBUTION.—Brazil: Goiás: Alto de Paraíso, Caiaponia, Cristalina, Guará, Veadeiros.

Vellozia glauca Pohl

SPECIMENS EXAMINED.—Irwin et al. 21395; Maguire et al. 44793.

SURFACE VIEW.—Hairs: absent. Epidermis: cells square to rectangular; thin walled. Stomata: paracytic, 21 × 18 μm; present on abaxial surface.

TRANSVERSE SECTION OF LAMINA.—Dorsiventral; open V-shaped with margins turned slightly inversely. Adaxial surface slightly undulating; abaxial surface furrowed one-fourth thickness of blade. Epidermis: adaxial and abaxial cells rounded and thin walled. Subjacent to epidermis occur four to five layers of sclerenchyma strands interspersed with two to four layered rows of parenchyma. A distinct layer of large parenchyma cells subjacent to sclerenchyma and parenchyma cells. Cuticle: evenly thickened on adaxial surface; thick and quite ridged on abaxial surface. Stomata: present in furrows; small substomatal chamber present. Mesophyll: three to five layers palisade tissue grading into spongy tissue. One to two layers large translucent palisade cells arranged radially above vascular bundles. Vascular bundles: 38–58; commissural bundles not observed. Veins have one to three large vessels, mostly one, rarely three. Two phloem units lying laterally in flanges of Y-shaped abaxial girder. Each vascular bundle has an adaxial cap. Abaxial strands near openings of furrows present between abaxial epidermis and a distinct layer of parenchyma cells. Bundle sheath extends completely around vascular bundle. Crystals: observed. Tannins: present.