Vellozia minima Pohl

Vellozia minima Pohl

SPECIMENS EXAMINED.—Duarte 2379; Maguire et al. 49099.

SURFACE VIEW.—Hairs: absent. Epidermis; cells rounded and rectangular; thin walled. Stomata: paracytic, 15 × 18 μm; present on abaxial and adaxial surface.

TRANSVERSE SECTION OF LAMINA.—Dorsiventral; widely V-shaped with small median adaxial groove. Both surfaces slightly undulating; no furrows present. Epidermis: adaxial and abaxial cells rounded to dome shaped; thin walled. Subjacent to adaxial epidermis is a layer of parenchyma cells. Cuticle: very thin on both surfaces. Stomata: present on adaxial and abaxial surfaces; substomatal chamber present. Mesophyll: fairly indistinct palisade tissue of two to three layers grading into a loose spongy tissue. Translucent cells radially arranged above some vascular bundles. Vascular bundles: 6–8; no commissural bundles observed. Two phloem units lying laterally in flanges of U-shaped abaxial girder; adaxial cap present on each bundle. Bundle sheath completely surrounding each vascular bundle. Crystals and tannins: none observed.

NOTE: As its name implies, this species is perhaps the smallest in the New World vellozias. The number of bundles is few but firmly organized. The abaxial portion of the midvein is slightly concave. The translucent cells in the adaxial portion of the midvein are quite distinct. The palisade cells are somewhat indistinct and loosely arranged.

Vellozia minima là một loài thực vật có hoa trong họ Velloziaceae. Loài này được Pohl miêu tả khoa học đầu tiên năm 1828.