Vellozia grisea Goethart & Henrard

Vellozia grisea Goethart & Henrard

SPECIMENS EXAMINED.—Weddell 3006.

SURFACE VIEW.—Hairs: present in clumps on adaxial and abaxial surfaces. Epidermis: cells square to rectangular, thin walled. Stomata: paracytic, 15 × 9 μm; present on abaxial and few on adaxial surface.

TRANSVERSE SECTION OF LAMINA.—Dorsiventral; V-shaped with deep median adaxial groove. Adaxial surface conspicuously ridged; adaxial furrows almost one-half thickness of blade. Epidermis: cells rounded to dome shaped on both surfaces; few conical on adaxial surface. Two to three layers of sclerenchyma cells subjacent to epidermis and interspersed with parenchyma cells. Below sclerenchyma is a layer of parenchyma cells. Cuticle: uniformly ridged and thick on both surfaces. Stomata: present in furrows; substomatal chamber virtually absent. Mesophyll: three to four layers indistinct palisade cells grading into compact spongy tissue; few translucent palisade cells radially arranged above vascular bundles. Vascular bundles: 20; commissural bundles not observed. Veins having one to two large vessels, mostly one. Two phloem units lying laterally in flanges of Y-shaped girder. Each vascular bundle has in addition to Y-shaped abaxial girder an adaxial cap. Vascular bundle completely surrounded by bundle sheath. Few strands of abaxial sclerenchyma observed. Crystals: not observed. Tannins: present.

NOTE: The adaxial surface is very heavily ridged. In some areas the ridges are deep enough to qualify as small furrows.

Vellozia grisea Goethart & Henrard

Vellozia grisea Goethart & Henrard, Blumea, 2:373, 1937.—L. B. Smith, Contr. U.S. Nat. Herb., 35:267, 1962.—Ayensu, Smithsonian Contr. Bot., 15:26, figs. 3i–j, 4b, pls. 16b, 42e, 50c, 1974.

TYPE.—Between Goiás, Goiás, and Cuiabá, Mato Grosso, Weddell 3006 (P, holotype; B, photo 23).

DISTRIBUTION.—Known only from the type-collection.

Subkey IV