Barbacenia foliosa Goethart & Henrard

Barbacenia foliosa Goethart & Henrard

Barbacenia foliosa Goethart & Henrard, Blumea, 2:344, fig. D, 1937—L. B. Smith, Contr. U.S. Nat. Herb., 35:277, 1962.

TYPE.—On rocks, Tijuca, Rio de Janeiro (city), Brazil, November 1894, Ule 4056 (B, holotype; B, photo).

DISTRIBUTION.—Known only from the type-collection.

20. Barbacenia burle-marxii L. B. Smith & Ayensu, new species

A B. foliosa Goethart & Henrard, cui affinis, foliorum laminis subduplo-latioribus, tepalis rotundatis apiculatisque differt.

Caudex not known. Leaves strongly sulcate on both sides, dry, glabrous; blades linear, finely attenuate, 20 cm long, 4 mm wide, involute when dry, serrulate on margins and keel especially toward apex.

Scape 24 cm long above leaf-sheaths, laxly vestite with minute pale stipitate glands. Flowers purple. Ovary narrowly turbinate, 14 mm long. Perianth-tube (whole) narrowly turbinate, 20 mm long, laxly and minutely pale-glandular. Anthers nearly equaling the appendages; coronoid appendages oblong with broadly rounded lobes, 9 mm long. Style exceeded by the stamens, apically subulate with 3 linear apically confluent stigmas.

LEAF ANATOMY (L. B. Smith & Ayensu 16014).— Surface View: Hairs: few tufts on edge of lamina. Epidermis: cells on both surfaces square to rectangular; thin-walled. Stomata: anomocytic with 4–6 subsidiary cells, mostly 4; 24 × 12 μm; present in rows on adaxial and abaxial surfaces.

Transverse Section of Lamina: Dorsiventral; widely V-shaped with extreme margins turned slightly inversely. Both surfaces slightly undulating, but some areas distinctly grooved. Epidermis: cells on both surfaces small; rounded to dome-shaped; thin-walled. Subjacent to epidermis occurs a layer of rounded, thin-walled parenchyma cells. Cuticle: thickened and slightly ridged on both surfaces. Stomata: present on both surfaces; fairly large substomatal chamber present; stomata flush with epidermal surface. Mesophyll: 4 or 5 layers of palisade-like cells; many cells idioblastic filled with tannin. Palisade-like cells followed by 5 or 6 layers of rounded, compactly arranged spongy cells. Few translucent cells above midvein. Vascular bundles: 33; commissural bundles observed. One or two large vessels present in each bundle; mostly one. Two phloem units present in flanges of abaxial girder. Both adaxial and abaxial girders very thin; Y-shaped with long stem extending laterally below epidermis. Bundle sheath completely surrounding each bundle. Crystals: few in mesophyll. Tannins: present in mesophyll.

TYPE.—Cultivated by Roberto Burle-Marx, 30 January 1972, originally from Venda Nova, Espirito Santo, Brazil, L. B. Smith & Ayensu 16014 (US, holotype).

DISTRIBUTION.—Known only from the type-collection.