Barbacenia brasiliensis Willd.

Barbacenia brasiliensis Willdenow

Barbacenia brasiliensis Willdenow, Sp. Pl., 2:227, 1799.— L. B. Smith, Contr. U.S. Nat. Herb., 35:278, 1962.

Barbacenia Vandelli, Fl. Lusit. & Brasil. Spec., 21, pl. 1, 1788.—Roemer, Script. Hisp., 98, pl. 6: fig. 9, 1796 [without indication of species].

Barbacenia bicolor Martius, Nov. Gen. & Sp., 1:19, pl. 13, 1823.—Seubert in Martius, Fl. Bras. 3(1):72, 1847 [type: Martius s n (M, holotype, n v), rocky and grassy mountain slopes, Diamantina, Minas Gerais, Brazil, 1200 m alt.].

Barbacenia vandelli Schultes f. in Roemer & Schultes, Syst., 7:288, 1826 [wrongly attributed to Roemer who cited the genus and its author without any specific name].

Visnea Steudel ex Endlicher, Gen., 173, 1837 [nomen in synonymy, without indication of species].

TYPE.—Brazil, collector(?) (holotype?). Based on Vandelli and Roemer illustrations in default of specimens.

DISTRIBUTION.—Brazil: Minas Gerais: Diamantina.

44. Barbacenia nanuzae L. B. Smith & Ayensu, new species

A B. hirtiflora Goethart & Henrard, cui affinis, floribus gracilibus subduplo longioribus differt.

Caudex not known. Leaf-blades linear, filiform-attenuate, 30 cm long, 14 mm wide, laxly setoseciliate, sulcate on both sides, otherwise smooth and glabrous.

Scapes to 26 cm long (complete), densely vestite with fine crisped mostly nonglandular hairs. Ovary subcylindric, ca. 30 mm long. Perianth-tube densely vestite with fine stipitate glands, the upper ellipsoid and slightly dilated from the ovary at anthesis, 18 mm long. Anther 7 mm long, much shorter than the sharply bidentate coronoid appendage. Style about equaling the appendages, the elliptic stigmas about 9 mm below the subulate sterile apex.

LEAF ANATOMY (partial leaf material) (Menezes 265).—Surface View: Hairs: few tufts on edge of lamina. Epidermis: cells on both surfaces square to rectangular; thin-walled. Stomata: paracytic and tetracytic; 24 × 18 μm; present in rows on both surfaces.

Transverse Section of Lamina: Isolateral; both surfaces very ridged with conspicuous grooves. Epidermis: cells on both surfaces rounded to dome-shaped; thin-walled. Cuticle: thick and very ridged on both surfaces. Stomata: present on both surfaces, mostly present on abaxial surface; stomata usually slightly below surface; small substomatal chamber observed. Mesophyll: 14 layers of large rounded, thin-walled cells. Vascular bundles: total unknown; commissural bundles observed. One or two large vessels present in each bundle. Two phloem units lying laterally in flanges of thick, Y-shaped abaxial girder. Thick, inverted Y-shaped adaxial girder present. Bundle sheath completely surrounding each bundle. Crystals: few present. Tannins: present in mesophyll.

TYPE.—Km 114 on the route from Lagoa Santa to Conceição do Mato Dentro, Serra do Cipó, Minas Gerais, Brazil, 10 September 1972, Menezes 265 (US, holotype; SPF, isotype).

DISTRIBUTION.—Known only from the type-collection.