Barbacenia grisea L. B. Sm.

Barbacenia grisea L. B. Smith

Barbacenia grisea L. B. Smith, Contr. U.S. Nat. Herb., 35:280, pl. 8, 1962.

TYPE.—Ca. 49 miles from Diamantina, Minas Gerais, Brazil, 1140 m alt, 22 December 1959, Maguire, Maguire & Pires 44745 (NY, holotype).

DISTRIBUTION.—Known only from the type-collection.

74. Barbacenia filamentifera L. B. Smith & Ayensu, new species

A B. grisea L. B. Smith, cui verisimiliter affinis, foliis anguistioribus, tubo perianthii valde curvato dense brunneo-piloso differt.

Caudex not seen. Leaf-blades linear, filiform-attenuate, 13 cm long, 7 mm wide, sulcate on both sides, laxly setose-ciliate, otherwise even and glabrous.

Scape 13 cm long, densely brown-pilose. Flower red (!Hatschbach & Pelanda), densely brown-pilose. Ovary slenderly ellipsoid, indistinct, ca. 15 mm long. Perianth-tube (whole) slenderly subcylindric, strongly curved, 5 cm long, 7 mm wide. Tepals nearly uniform, narrowly lanceolate, acute and apiculate, 25 mm long. Anthers unknown; coronoid appendages (incomplete) suboblong, over 5 mm long. Style and stigmas unknown.

LEAF ANATOMY (Hatschbach & Pelanda 27955).— Surface View: Hairs: none observed. Epidermis: cells on both surfaces 4- to 6-sided, but mostly rectangular; thin-walled. Stomata: tetracytic; 24 × 18 μm; present in rows on both surfaces.

Transverse Section of Lamina: Dorsiventral; V-shaped with margins turned slightly downward. Both surfaces very gently undulating. Epidermis: cells on both surfaces rounded to dome-shaped; few conical; thin-walled. Cuticle: slightly thickened and smooth over entire surface. Stomata: present on both surfaces; stomata flush with epidermal surface; small substomatal chamber present. Mesophyll: 3 layers of small palisade cells followed by 4 or 5 layers of large, rounded, thin-walled, translucent cells. Subjacent to these occur 4 or 5 layers of smaller, rounded cells; some translucent. Large, translucent cells above midvein. Vascular bundles: 29; commissural bundles observed. One large vessel in each bundle. Two phloem units present in flanges of thick Y-shaped abaxial girder which extends to abaxial epidermis. Thick, inverted Y-shaped adaxial girder present; extending to adaxial epidermis and laterally along epidermis. Bundle sheath completely surrounding each vascular bundle. Crystals: druses present in many mesophyll cells. Tannins: present in mesophyll and epidermis.

TYPE.—On rock outcrops by Route BR 259, Mun. Datas, Minas Gerais, Brazil, 1400 m alt, 14 November 1971, Hatschbach & Pelanda 27955 (US, holotype; MBM, isotype).

DISTRIBUTION.—Known only from the type-collection.

Note: It is hoped that the above unsatisfactory description can be improved by further collections since the type-locality is so well defined.

75. Barbacenia pallida L. B. Smith & Ayensu, new species

A B. filamentifera L. B. Smith & Ayensu, cui affinis, foliorum laminis aequaliter attenuatis vix filamentiferis scapum superantibus, floribus albis, tubo perianthii recto laxe piloso differt.

Caudex 20 cm high (!Irwin. “Herb to ca. 20 cm. tall.”), over 12 mm thick including leaf-bases. Leaves 3-ranked, sulcate on both sides; sheaths slightly exposed at apex; blades linear, evenly attenuate, 22 cm long, 5 mm wide at base, ciliate with erect or suberect setae, otherwise glabrous.

Scapes solitary, 15 cm long above the leaf-sheaths, laxly pale-pilose. Flowers white (!Irwin et al.), laxly pale-pilose. Ovary slenderly ellipsoid, slightly wider than the upper perianth-tube, ca. 20 mm long. Perianth-tube (whole) 45–60 mm long, slenderly cylindric above the ovary, 4–5 mm wide. Tepals nearly uniform, narrowly oblong, 25–30 mm long, the inner nearly glabrous. Anthers erect, 13 mm long, attached near their base and near the apex of the appendage; coronoid appendages subtriangular, obtuse, unlobed, 12 mm long. Style exceeding the anthers, ellipsoid-enlarged at apex with 3 oblong apically confluent stigmas.

LEAF ANATOMY (Irwin et al. 22608).—Surface View: Hairs: few tufts of hairs on edge of lamina. Epidermis: cells on adaxial surface square to rectangular; walls slightly thickened. Abaxial cells usually square to rectangular; few with more sides; walls slightly thickened. Stomata: paracytic and tetracytic; 30 × 18 μm; present on abaxial surface in rows.

Transverse Section of Lamina: Dorsiventral; widely V-shaped. Both surfaces only very gently undulating. Epidermis: cells rounded to dome-shaped; walls slightly thickened; outer tangential walls thicker. Cuticle: thin and smooth over entire surface. Stomata: present on abaxial surface only; outer ledges present; stomata flush with epidermal surface; small substomatal chamber present. Mesophyll: 4 layers of small palisade cells followed by 3 layers of large, rounded, thin-walled cells, mostly translucent. Below this occur 3 or 4 layers of compactly arranged rounded cells. Translucent cells occur above midvein. Vascular bundles: 27; 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. Inverted Y-shaped adaxial girder present on each bundle. Girders extend to epidermis. Bundle sheath completely surrounding each vascular bundle. Crystals: druses in all of mesophyll except translucent cells. Tannins: present.

TYPE.—Rocky cerrado, ca. 15 km northeast of Diamantina on road to Mendanha, Minas Gerais, Brazil, 1300 m alt, 26 January 1969, Irwin, Reis dos Santos, Souza & Fonseca 22608 (NY, holotype; US, photo).

DISTRIBUTION.—Known only from the type-collection.

Note: The flower of B. pallida strongly resembles that of B. gentianoides Goethart & Henrard, but its coronoid appendages are free and unlobed.

76. Barbacenia salmonea L. B. Smith & Ayensu, new species

A B. pallida L. B. Smith & Ayensu, cui affinis, tepalis antherisque recurvatis, floribus salmoneis, appendicibus coronoideis multo minoribus differt.

Caudex (incomplete) over 4 cm long, 15 mm thick including leaf-sheaths. Leaves obscurely 3-ranked; sheaths covered; blades linear, evenly attenuate, 12 cm long, 4 mm wide, appearing resinous-spotted beneath when dry, laxly setose-ciliate, otherwise glabrous.

Scape single, 9 cm long above the leaf-sheaths, laxly pale-pilose. Flowers salmon (!Sazima, Sazima & Menezes), very laxly pale-pilose. Ovary slenderly turbinate, ca. 20 mm long, barely distinct. Perianth-tube (whole) slenderly cylindric, 55 mm long, 4 mm wide. Tepals recurving, nearly uniform, oblong, rounded and apiculate, 17 mm long, 4 mm wide. Anthers recurving, 11 mm long, apiculate; coronoid appendices subelliptic with 2 short subacute lobes, 3 mm long. Style ellipsoid at apex with 3 broad apically confluent stigmas.

LEAF ANATOMY. (Sazima, Sazima & Menezes 239).—Surface View: Hairs: none observed. Epidermis: cells square to rectangular on both surfaces; few irregular among stomata; walls thickened. Stomata: tetracytic; 24 × 18 μm; present in rows on abaxial surface.

Transverse Section of Lamina: Dorsiventral; widely V-shaped with extreme margin tips turned downward. Both surfaces slightly undulating. Epidermis: rounded to dome-shaped on both surfaces; walls thickened. One layer of rounded parenchyma cells subjacent to adaxial epidermis. Larger cells above midvein. Cuticle: thin and smooth on entire surface. Stomata: present on abaxial surface only; stomata flush with epidermal surface; small substomatal chamber present. Mesophyll: 3 layers of small palisade cells followed by 4 layers of large, rounded, thin-walled cells. Below this occur 3 or 4 layers of small, compactly arranged, rounded cells. Some mesophyll cells appear translucent. Vascular bundles: 27; commissural bundles observed. One large vessel present in each bundle. Two phloem units lying laterally in flanges of Y-shaped abaxial girder. Slightly slender inverted Y-shaped adaxial girder present on each bundle. Bundle sheath completely surrounding each vascular bundle. Crystals: present in most of mesophyll. Tannins: present.

TYPE.—On rocks by brook, high ground, km 126 on the road from Lagoa Santa to Conceição do Mato Dentro, Serra do Cipó, Minas Gerais, Brazil, 23 July 1972, Sazima, Sazima & Menezes 239 (US, holotype; SPF, isotype).

DISTRIBUTION.—Known only from the type-collection.