Barbacenia beauverdii Damazio

Barbacenia beauverdii Damazio

Barbacenia beauverdii Damazio, Bull. Herb. Boiss., ser. 2, 595, unnumbered fig. 1907.—L. B. Smith, Contr. U.S. Nat. Herb., 85:276, 1962.

TYPE.—Among rocks, near Arrial de Antonio Pereira, Serra do Frasão, Minas Gerais, Brazil, 1100 m alt, 26 March 1907, L. Damazio 1846 (G. holotype).

DISTRIBUTION.—Known only from the type-collection.

5. Barbacenia pabstiana L. B. Smith & Ayensu, new species

A B. caricina Goethart & Henrard, cui affinis, floribus violaceis vel azureis, antheris appendicibus coronoideis subaequantibus differt.

Caudex decumbent (?), simple or branched, 5–9 cm long, ca. 5 mm thick (including leaf-sheaths). Leaves clearly 3-ranked, glabrous; sheaths exposed up to 5 mm, somewhat viscid; blades linear, filiform-attenuate, to 18 cm long, 3–4 mm wide, the thick yellowish margin laxly serrulate.

Scape solitary, 13–19 cm long above the leaf-sheaths, laxly setulose. Flower ca. 3 cm long, laxly setulose at base and more or less on ribs, elsewhere glabrous, blue to violet. Ovary cylindric becoming ellipsoid, to 12 mm long. Perianth-tube contracted above ovary into a 2–3 mm cylinder. Tepals divergent at anthesis, 15 mm long, elliptic, the inner distinctly broader than the outer. Stamens slightly exceeding the broadly spatulate bilobed 7 mm long coronoid appendages. Style slenderly clavate at apex with 3 linear apically confluent stigmas.

LEAF ANATOMY (Hatschbach & Ahumada 31360)—Surface View: Hairs: none observed. Epidermis: cells on both surfaces square to rectangular; thin-walled. Stomata: anomocytic with 4–6 subsidiary cells, mostly 4; 24 × 21 μm; present in rows on both surfaces.

Transverse Section of Lamina: Dorsiventral; V-shaped with small but sharp median adaxial groove. Surface gently undulating but some areas clearly grooved. Epidermis: cells on both surfaces rounded to dome-shaped; thin-walled. One layer of rounded cells subjacent to adaxial epidermis. Cuticle: thickened and slightly ridged over entire surface. Stomata: present on both surfaces; stomata flush with epidermal surface; substomatal chamber present. Mesophyll: 3 or 4 layers of palisade cells followed by 6 or 7 layers of rounded or rectangular thin-walled cells, some cells translucent, others idioblastic. Many cells filled with chlorophyll in chloroplasts. Vascular bundles: 41; commissural bundles observed. One or two vessels present in each bundle, mostly one. Two phloem units lying laterally in flanges of Y-shaped abaxial girder. Inverted Y-shaped adaxial girder present on each bundle, except midvein. Bundle sheath completely surrounding each vascular bundle. Crystals: few solitary crystals observed. Tannins: few present.

TYPE.—Cliffs of hillside, Aracê, Mun. Domingos Martins, Espírito Santo, Brazil, 800–1000 m alt, 7 February 1973, Hatschbach & Ahumada 31360 (US, holotype; MBM, isotype).

DISTRIBUTION.—Brazil, Espírito Santo: Pedra Azul, 1000 m alt, 24 August 1970, Kautsky 279 (HB, US).