Vellozia cinerascens (Mart.) Mart. ex Seub.

Vellozia cinerascens Martius ex Schultes f

SPECIMENS EXAMINED.—Lehnkner 323.

SURFACE VIEW.—Hairs: present in clusters. Epidermis: adaxial cells rectangular; abaxial cells mostly square, few rounded or rectangular; cell walls thin on both surfaces. Stomata: paracytic, 18 × 6 μm; present on abaxial surface.

TRANSVERSE SECTION OF LAMINA.—Dorsiventral; flanged V-shaped. Adaxial surface deeply ridged; abaxial surface furrowed about one-third the thickness of blade. Epidermis: adaxial cells dome shaped to conical; interspersed with large strands of sclerenchyma positioned above vascular bundles and furrows. Abaxial cells rounded to dome shaped, thin walled; inner to cells lined with rectangular strands of sclerenchyma, leaving about one-half of furrows uncovered. Cuticle: thin and ridged on both adaxial and abaxial surfaces. Stomata: present in abaxial furrows and spaces between sclerenchyma strands; substomatal chamber present. Mesophyll: two to three layers palisade, grading into loosely compact spongy tissue. Translucent palisade radially arranged above vascular bundles. Vascular bundle: 39; commissural bundles not observed. One to two large vessels present in vascular bundles. Two phloem units laterally arranged in flanges of U-shaped abaxial girder. Each bundle always accompanied by an adaxial cap and an abaxial U-shaped sclerenchyma vascular bundle completely surrounded by a bundle sheath. Crystals and tannins: none observed.

NOTE: The arrangement and disposition of adaxial and abaxial sclerenchyma strands are very distinctive for this species.

Vellozia cinerascens là một loài thực vật có hoa trong họ Velloziaceae. Loài này được (Mart.) Mart. ex Seub. miêu tả khoa học đầu tiên năm 1847.