Comprehensive Description
provided by Smithsonian Contributions to Botany
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.
- bibliographic citation
- Ayensu, Edward S. 1974. "Leaf Anatomy and Systematics of New World Velloziaceae." Smithsonian Contributions to Botany. 1-125. https://doi.org/10.5479/si.0081024X.15
Comprehensive Description
provided by Smithsonian Contributions to Botany
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
- bibliographic citation
- Smith, Lyman B. and Ayensu, Edward S. 1976. "A Revision of American Velloziaceae." Smithsonian Contributions to Botany. 1-172. https://doi.org/10.5479/si.0081024X.30
Vellozia grisea: Brief Summary
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provided by wikipedia VI
Vellozia grisea là một loài thực vật có hoa trong họ Velloziaceae. Loài này được Goethart & Henrard miêu tả khoa học đầu tiên năm 1937.
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