Vellozia barbaceniifolia Seub.

Vellozia barbaceniifolia Seubert

Vellozia barbaceniifolia Seubert in Martius, Fl. Bras., 3(1):79, 1847.—L. B. Smith, Contr. U.S. Nat. Herb., 35:261, 1962.

LEAF ANATOMY (Sellow s n).—Surface View: Hairs: few tufts observed on adaxial surface. Epidermis: cells on both surfaces square to rectangular; thin-walled. Stomata: tetracytic, 15 × 12 μm; most present in abaxial furrows; few on abaxial surface.

Transverse Section of Lamina: Dorsiventral; V-shaped with small median adaxial groove and margins curved down. Adaxial surface slightly undulating; abaxial furrowed ½ thickness of blade. Epidermis: adaxial and abaxial cells rounded to dome-shaped; outer tangential wall slightly thickened; sclerenchyma fibers replacing some epidermal cells on both surfaces. Subjacent to adaxial epidermis is a layer of slightly thickened cells interspersed with sclerenchyma fibers; below is a layer of large parenchyma cells. Subjacent to abaxial epidermis is a layer of large parenchyma cells. Cuticle: thin and smooth on both surfaces. Stomata: mostly present in abaxial furrows; few on abaxial surface; stomata flush with surface; small projections observed in furrowed walls; small substomatal chamber present. Mesophyll: 3 or 4 layers of palisade cells followed by compactly arranged spongy mesophyll; 3 or 4 layers of translucent palisade cells radially arranged above vascular bundles, furrows, and midvein. Vascular bundles: 30; commissural bundles observed. One or two large vessels present in each bundle, mostly one. Two phloem units lying laterally in flanges of thin abaxial girder. Adaxial cap present on each bundle. Bundle sheath completely surrounding each bundle. Crystals and tannins: few present.

TYPE.—Without locality, Brazil, Sellow s n (B, holotype; US, photo).

DISTRIBUTION.—Known only from the type-collection.

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