Vellozia epidendroides Mart.

Vellozia epidendroides Martius ex Schultes f

Vellozia epidendroides Martius ex Schultes f. in Roemer & Schultes, Syst., 7:292, 1826.—Seubert in Martius, Fl. Bras., 3(1):81, 1847.—L. B. Smith, Contr. U.S. Nat. Herb., 35:262, 1962.—Ayensu, Smithsonian Contr. Bot., 15:21, fig. 9a–c, pl. 31b–d, 1974.

Vellozia gracilis Seubert in Martius, Fl. Bras., 3(1):81, pl. 9, 1847—L. B. Smith, Contr. U.S. Nat. Herb., 35:267, 1962 [type: without locality, Minas Gerais, Brazil, Sellow s n (B, holotype)].

TYPE.—Without locality, Minas Gerais, Brazil, Martius s n (M, holotype; F, photo 18973).

DISTRIBUTION.—Brazil: Minas Gerais: Datas, Diamantina, Gouvêia, Jaboticatubas and Sêrro in the Serra do Cipó.

Vellozia epidendroides Martius ex Schultes f

SPECIMENS EXAMINED.—Achwake 19321; Brade 19136; Duarte 6537; Lima and Brade 13297A; Macedo 2993; Pereira 2229; Maguire et al. 49060; Schwake 8354; L. B. Smith 6762; Duarte 4519.

SURFACE VIEW.—Hairs: few present. Epidermis: adaxial and abaxial cells mainly cuboidal with few rows of rectangular cells; cell walls thin. Stomata: paracytic, 21 × 14 μm; observed on abaxial side only.

TRANSVERSE SECTION OF LAMINA.—Dorsiventral; V-shaped with shallow median adaxial groove; margins of lamina turned inversely. Adaxial surface slightly undulating; occasionally somewhat ridged; abaxial surface furrowed one-fifth to one-half thickness of blade. Epidermis: adaxial cells more or less dome shaped, interspersed with conical cells; abaxial cells mainly rounded; cells thin walled. Subjacent to adaxial epidermis occur one to three layers of sclerenchyma bands interspersed with parenchyma cells. Below is one conspicuous layer of parenchyma cells. Subjacent to abaxial epidermis occurs a layer or two, sometimes strands of sclerenchyma. Cuticle: thick on abaxial and adaxial surfaces; smooth. Stomata: present in abaxial furrows; somewhat associated with epidermal protuberances. Mesophyll: adaxial palisade cells one to two layers, gradually changing into spongy tissue; spongy tissue compactly arranged. One to two layers of large translucent palisade cells arranged radially above vascular bundles and furrows; of some specimens quite numerous in midvein region. Vascular bundles: 10 to 27; no commissural bundles observed. Each vein large with one to three wide vessels. Two phloem units lying laterally in flanges of abaxial Y-shaped partial girder. Each vascular bundle accompanied by adaxial cap, sometimes much larger than abaxial girder. Vascular bundle

completely surrounded by distinct bundle sheath. Crystals and tannins: not observed.

NOTE: Notwithstanding the general uniformity of the specimens examined, there are certain variations in the depth of the furrows, the shape of the abaxial portions of the midveins (some are pointed, others are flattened), and the shape of the margins. These modifications may constitute varietal characteristics.

Vellozia epidendroides là một loài thực vật có hoa trong họ Velloziaceae. Loài này được Mart. miêu tả khoa học đầu tiên năm 1829.