Barbacenia glabra Goethart & Henrard

Barbacenia glabra Goethart & Henrard

Barbacenia glabra Goethart & Henrard, Blumea, 2:348, fig. H, 1937.—L. B. Smith, Contr. U.S. Nat. Herb., 35:281, 1962.

TYPE.—Minas Gerais, Brazil, St.-Hilaire C1 352 (P, holotype; B photo 137).

DISTRIBUTION.—Known only from the type-collection.

78. Barbacenia nuda L. B. Smith & Ayensu, new species

A B. glabra Goethart & Henrard, cui affinis, foliis latioribus quam scapo brevioribus, tepalis obtusis, appendicibus coronoideis apice valde dilatatis cum lobis suborbicularibus differt.

Caudex (incomplete) over 2 cm long, completely covered by leaves. Leaf-blades linear, attenuate, 8 cm long, 8 mm wide, sulcate on both sides, serrulate on margins and keel especially toward apex, otherwise smooth and glabrous.

Scapes 2, 9 cm long, glabrous. Flower dull red when dry, glabrous. Ovary slenderly fusiform, indistinct, ca. 20 mm long. Perianth-tube (whole) slenderly cylindric, 45 mm long, 4 mm wide. Tepals 20 mm long, obtuse, the outer lanceolate and 4 mm wide, the inner narrowly ovate and 6 mm wide. Anthers 7 mm long; coronoid appendages spatulate with 2 suborbicular lobes, 6 mm long. Style ellipsoid at apex with 3 broad apically confluent stigmas.

LEAF ANATOMY (Semir & Menezes 282).—Surface View: Hairs: none observed. Epidermis: cells on both surfaces square to rectangular; thin-walled. Stomata: tetracytic; 24 × 18 μm; present in rows on both surfaces.

Transverse Section of Lamina: Dorsiventral; deeply V-shaped. Both surfaces quite smooth. Epidermis: cells on both surfaces rounded to dome-shaped; thin-walled. Cuticle: thick and ridged on entire surface. Stomata: present on both surfaces; stomata flush with epidermal surface; substomatal chamber present. Mesophyll: 4 or 5 layers of small palisade cells followed by 4 or 5 layers of rounded, thin-walled cells. Vascular bundles: 59; commissural bundles observed. One large vessel present in each bundle. Two phloem units lying laterally in flanges of Y-shaped abaxial girder. Inverted Y-shaped adaxial girder present on each bundle. Girders extending to epidermis on both sides. Each vascular bundle completely surrounded by a conspicuous bundle sheath. Crystals: none observed. Tannins: present, especially in epidermis.

TYPE.—Near brook and waterfall, km 126 of the road from Lagoa Santa to Conceição do Mato Dentro, Serra do Cipó, Minas Gerais, Brazil, 2 November 1972, (Semir &) Menezes 282 (US, holotype; SPF, isotype).

DISTRIBUTION.—Known only from the type-collection.

Barbacenia glabra là một loài thực vật có hoa trong họ Velloziaceae. Loài này được Goethart & Henrard miêu tả khoa học đầu tiên năm 1937.