Bulbostylis minensis Prata & M. G. Lopez. A. Habit. B. Inflorescence. C. Spikelet. D. Flower. E Sheath 2017, sp. nov.
Creators: name: Prata, Ana Paula Do Nascimento
name: López, M. Gabriela
name: William Wayt Thomas
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Poales
Cyperaceae
Bulbostylis
Bulbostylis minensis

description: 3. Bulbostylis minensis Prata & M.G.López, sp. nov.
Type:— BRAZIL. Minas Gerais: Santana do Riacho, Serra do Cipó, 3–5 km norte de Palácio, 03 April 2001, Prata et al. 1157 (holotype ASE!, isotype SP!). Figure 5 and 6.
Bulbostylis minensis resembles B. junciformis in its inflorescence structure but differs from the latter in its glabrous involucral bracts and glumes and its tuberculate achene surface.
Cespitose perennial, 20–32 cm tall, the base castaneous, not thickened. Leaves 12–21 × 0.02 cm, 1/3–2/3 the length of the scape; sheaths 1.5–3 cm long, membranaceous, pale castaneous, longitudinally lined, glabrous except for the oblique and densely ciliate apex, the trichomes white, ± 4 mm long.; blade capillary, glabrous, erect, the adaxial face smooth to longitudinally lined, the abaxial face canaliculate-reticulate, the margins scabrous. Scape 0.4–0.5 mm diam., cylindrical, ribbed, glabrous. Involucral bracts 3, leaflike, glabrous, the base dilated, the margins hyaline and thickened, scabrous, the basal bract longest, 1–3.5 cm long, exceeding the inflorescence, the others gradually diminishing in size. Inflorescence 0.5–1 × 0.5–1.3 cm, capitate, hemispherical, one head per scape, 4–15 spikelets. Spikelets 3–7 × 1–1.5 mm, lanceolate, 17–21 flowers, sessile. Glumes 2–2.5 × 1.5–2 mm, persistent, lanceolate, navicular, membranaceous, pale castaneous, the keel trinerved, the apex acute, short mucronate, the surface glabrous, papillose, the margins hyaline, thickened, irregular, ciliate, sterile glumes absent. Flowers with 3 stamens, the anthers 0.9 mm long, the connective prolonged, the style 1.5 mm long, trifid. Achene 0.7–0.9 × 0.5–0.6 mm, obovoid, trigonous, castaneous, the angles thickened, cream, shiny, the base atenuate, the surface tuberculate, the silica body prominent, the apex trilobed, the stylopodium persistent, dark castaneous, triangulate, 1/8 the length of the achene.
Habitat and distribution:— Known only from the Serra do Cipó in the state of Minas Gerais. Occurs in rocky meadows (campo rupestre).
Paratypes:— BRAZIL. Minas Gerais: Serra do Cipó, Santana do Riacho, afloramento rochoso das Canela-de-Ema–gigantes, próximo à portaria do Ibama Alto Palácio, 16 November 1995, J.A. Lombardi 1028 (BHCB). Santana do Riacho, estrada para Conceição do Mato dentro, Km 110, 19º16´57” S, 43º43´41” W, Parna Serra do Cipó, 30 November 2000, Prata, A.P. 1065 et al. (SP). Posto do Ibama, Portal do Palácio, 19º14´48” S e 43º30´36” W, 30 November 2000, Prata, A.P. 1077 et al. (SP). Diamantina, 20 km S de Diamantina, na estrada para Curvelo, 1250 m alt., 18º20´S, 43º40´W, 24 November 1985, Thomas, W.W. 4901 et al. (SPF).
Notes:— Bulbostylis minensis resembles B. junciformis in its inflorescence structure. It differs, however, in the characters listed in Table 1 and in Figure 2 A–B.
description: Published as part of Prata, Ana Paula Do Nascimento, López, M. Gabriela & William Wayt Thomas, 2017, New species of Bulbostylis (Cyperaceae) from South America, pp. 219-230 in Phytotaxa 314 (2) on page 223, DOI: 10.11646/phytotaxa.314.2.3, http://zenodo.org/record/13686260