Barbacenia brachycalyx Goethart & Henrard

Barbacenia brachycalyx Goethart & Henrard

Barbacenia brachycalyx Goethart & Henrard, Blumea, 2:340, fig. A, 1937.—L. B. Smith, Contr. U.S. Nat. Herb., 35:276, 1962.

TYPE.—On rocks, Pichoa to Morro do Espigão, Goiás, Brazil, Glaziou 22207 (L, holotype; B, photo 138 and s n).

DISTRIBUTION.—Known only from the type-collection.

2. Barbacenia cylindrica L. B. Smith & Ayensu, new species

A B. brachycalyce Goethart & Henrard, cui verisimiliter affinis, tubo perianthii valde majore et quam tepalis longioribus differt.

Caudex unknown except apex, this 13 mm in diameter (including leaf-bases). Leaves obscurely 3-ranked, subdensely imbricate, dry, glabrous; sheaths little if at all exposed, sulcate with distinct space between the nerves, entire; blades linear, attenuate to a filiform apex, 32 cm long, 8 mm wide, sulcate on both sides, laxly and obscurely serrulate near apex, elsewhere the teeth reduced to dark knobs.

Scape solitary, 25 cm long above the leaf-sheaths, glabrous. Flower glabrous, over 5 cm long, bright scarlet (!Anderson). Ovary subcylindric, acute at base, 18 mm long, 4.5 mm wide. Perianth-tube above ovary cylindric, flaring slightly near apex, 12 mm long. Tepals erect at anthesis, uniform, oblong, subacute, 23 mm long, 5 mm wide. Stamens 14 mm long; coronoid appendages oblong, sharply bifid, connate at base into a 4 mm long tube, slightly exceeding the 9 mm long anthers. Style shorter than the stamens, ellipsoid at apex with 3 linear apically confluent stigmas.

LEAF ANATOMY (Anderson 7217).—Surface View: Hairs: none observed. Epidermis: cells square to rectangular on both surfaces; thin-walled. Stomata: tetracytic; 27 × 18 μm; present in rows on both surfaces.

Transverse Section of Lamina Isolateral; very widely V-shaped. Both surfaces almost smooth. Epidermis: cells on both surfaces rounded to dome-shaped; few conical; thin-walled. Cuticle: slightly thickened and smooth on entire surface. Stomata: present on both surfaces; stomata flush or slightly below epidermal surface; very small substomatal chamber present. Mesophyll: 11 or 12 layers of rounded, thin-walled cells. Cells larger and translucent in middle 4 or 5 layers of mesophyll. Vascular bundles: 45; commissural bundles observed. One or two large vessels present in each bundle, mostly one. Two phloem units lying laterally in flanges of Y-shaped abaxial girder which extends to the abaxial epidermis. Inverted Y-shaped adaxial girder present on each bundle and extends to adaxial epidermis. Bundle sheath completely surrounding each bundle. Crystals: few present in mesophyll. Tannins: present.

TYPE.—By stream in shrubby woods, Chapada dos Veadeiros, 13 km by road south of Terezina, ca. 1000 m alt, 16 March 1973, Anderson 7217 (US, holotype; NY; UB, isotypes).

DISTRIBUTION.—Known only from the type-collection.

3. Barbacenia spiralis L. B. Smith & Ayensu, new species

A B. brachycalyce Goethart & Henrard, cui verisimiliter affinis, foliorum laminis spiraliter recurvatis, tubo perianthii late obconico, tepalis multo majoribus differt.

Caudex decumbent, to 5 dm long (!Irwin et al.), 15 mm thick (including old leaf-sheaths). Leaves apparently much more than 3-ranked, very densely imbricate; sheaths completely hidden until very old and shattered; blades recurving in tight spirals, linear-lanceolate, filiform-attenuate, 10 cm long, 14 mm wide, laxly ciliate toward base with spreading setae 5 mm long, elsewhere glabrous, sulcate on both sides.

Scape solitary, 9 cm long above the leaf-sheaths, glabrous. Flower (immature) over 5 cm long, glabrous, dull red (!Irwin et al.). Ovary broadly obconic, 12 mm high. Perianth-tube (whole) broadly obconic, blending with lines of ovary, 16 mm high. Tepals linear-lanceolate, acute, 5 cm long in bud. Stamens as long as the tepals in bud; anthers 18 mm long; filaments free; coronoid appendages oblong, erose at summit, 25 mm long. Style and stigma not observed.

LEAF ANATOMY (Irwin et al. 27642).—Surface View: Hairs: none observed. Epidermis: cells on both surfaces square to rectangular; few with more sides; thin-walled. Stomata: tetracytic; 21 × 12 μm; present in rows on both surfaces.

Transverse Section of Lamina: ? Isolateral; almost horizontal. Both surfaces slightly ridged, especially adaxial. Few tufts of hairs at extreme margin of blade. Epidermis: cells on both surfaces rounded to dome-shaped; thin-walled. Cuticle: thick and ridged over entire surface. Stomata: present on both surfaces; stomata slightly sunken; small substomatal chamber present. Mesophyll: consisting of layers of rounded to elongated cells on adaxial side followed by 6 or 7 layers of rounded, translucent, or obliterated cells; below this are 4 or 5 layers of rounded, thin-walled cells. Cells large and translucent above midvein. Vascular bundles: 51; commissural bundles observed. One large vessel present in each bundle. Two phloem units lying laterally in flanges of U-shaped abaxial girder. Thick, inverted Y-shaped adaxial girder present on each bundle. Girders extend to epidermis on both sides. Bundle sheath completely surrounding each bundle. Crystals: few present in mesophyll. Tannins: few observed.

Note: The mesophyll cells often break down and become obliterated in mature leaves especially in the intercostal region.

TYPE.—On outcrop in cerrado, ca. 8 km east of Diamantina on road to Extração, Serra do Espinhaço, Minas Gerais, Brazil, 1175 m alt, 16 March 1970, Irwin et al. 27642 (NY, holotype).

DISTRIBUTION.—Known only from the type-collection.