New species of Dyckia (Bromeliaceae) from Brazil Leme, Elton M. C. Ribeiro, Otávio B. C. Miranda, Zenilton De J. G. Phytotaxa 2012 2012-09-26 67 1 9 37 385QL Leme Leme 2012 [151,467,422,451] Liliopsida Bromeliaceae Dyckia Plantae Poales 17 26 Tracheophyta species pottiorum sp. nov.   Type:—  BRAZIL. Mato Grosso do Sul: Corguinho, road MS 080,  Corguinhoto Rio Negro, km  99, 493 melevation, 19° 43’ 53.8” S 54° 54’ 45.2” W,  16 September 2011,  E .   Lemeet al. 8579( holotype RB!, isotype HB!). Plants saxicolous, nearly prostrate, flowering 23–52 cmhigh. Leaves 12 to 18 innumber, distichously arranged, flabellate, coriaceous; sheaths reniform, the older ones forming a subglobose bulb, ca. 2.5 × 4 cm, castaneous at the base and greenish toward the apex, glabrous except for the densely and coarsely white lepidote upper portion; blades sublinear-attenuate, strongly U-canaliculate with erect margins mainly when under water stress, distinctly arcuate with recurved apical portion, 20–38 cmlong, 1.5–2.5 cmwide near the base, green or bronze to reddish colored, opaque, in the same population the green specimen densely white lepidote at the base only and glabrous toward the apex on both sides, and the bronze and reddish specimens densely and coarsely white lepidote abaxially with the trichomes obscuring the color of the blades, and densely to sparsely white lepidote adaxially with trichomes disposed mainly along the intercostal zones and not completely obscuring the color of the blades, nerved on both sides, apex long acuminate-caudate, pungent-spinescent, margins glabrous, densely (at the base) to sparsely (toward the apex) spinose, spines narrowly triangular to acicular, 1–3 mmlong, the basal ones 1–3 mmapart, the remaining ones 5–7 mmapart, straight to prevailingly retrorse-uncinate, castaneous, glabrous. Peduncle erect, 10–34 cmlong, 2–3 mmin diameter, glabrous, green to dark purplish-wine; peduncle bracts erect, stramineous, distinctly nerved, with a central protruded longitudinal nerve toward the apex and appearing carinate, densely white lepidote to glabrous, with a suborbicular base 3–5 × 3–5 mm, and a long acuminate-caudate blade, 5–18 × 2–3 mm, exceeding (basal ones) to shorter than the internodes, margins minutely spinulose. Inflorescence erect, 6–11 cmlong, densely flowered, rachis slightly flexuous, terete, orange toward the apex, glabrous, 1.5–2.5 mmin diameter, internodes 5–12 mmlong; floral bracts subtriangular-ovate, acuminate, ecarinate, nerved, stramineous, glabrous, thin in texture, 4–8 × 3–4 mm, suberect to subspreading with the flowers, distinctly shorter than the sepals, margins inconspicuously denticulate to entire. Flowers 11 to 18 innumber, 14–15 mmlong, subspreading at anthesis and suberect secund afterwards, odorless; pedicels inconspicuous, stout, 2–3 mmlong, ca. 5 mmin diameter at the apex; sepals ovate, rounded and inconspicuously apiculate, symmetric, ecarinate, ca. 6 × 5 mm, orange to yellowish-orange, glabrous, entire; petals symmetric, broadly spathulate from a narrower base, apex truncate and inconspicuously emarginate, connate at the base for ca. 1.5 mmto form a common tube with the filaments, ca. 11 × 9 mm, ecarinate, orange to yellowish-orange, suberect at anthesis and forming a subtubular corolla ca. 6 mmin diameter at the apex; stamens about equaling the petals; filaments complanate, yellowish, connate at the base for ca. 1.5 mmand free above the common tube with the petals; anthers sublinear, ca. 4 mmlong, base distinctly bilobed, apex apiculate, slightly recurved near the apex, fixed at the base; pistil ca. 7 mmlong, hidden by the filaments; stigma conduplicate-spiral, blades orange; style ca. 1.5 mmlong, yellowish; ovary ovate, ca. 4.5 mmlong, ca. 2 mmin diameter, yellowish. Capsules broadly fusiform, 12–15 × 8–10 mm, greenish at early development to dark greenish-castaneous afterwards; seeds suborbicular, flat, ca. 3.5 × 3 mm, castaneous.   Distribution and habitat:—  Dyckia pottiorumis known from the typecollection only, where it grows in full sun, forming small groups of plants on shallow soils accumulated on flat or slightly inclided rocky outcrops. The area supports Cerrado vegetation with sparse shrubs to small trees varying according to the soil depth.   Etymology:—The name chosen for this new species honors the botanists Arnildo Pott and Vali Joana Pott of the Programa de Pós Graduação em Biologia Vegetal, Universidade Federal de Mato Grosso do Sul, for their so valuable contribution to the knowledge of the flora of Central Brazil.   Additional specimens examined ( paratypes):— BRAZIL. Mato Grosso do Sul: Corguinho, road MS 080,  Corguinhoto Rio Negro, km.  99, 493 melevation, 19° 43’ 53.8” S 54° 54’ 45.2” W,  16 September 2011, Leme et al 8578( RB); ibidem, 8580( RB).  Observations:—Like most of the Bromeliaceaemembers,  Dyckiaspeciesusually have leaves spirally arranged in rosettes.  Dyckia estevesii Rauh (1987: 918),  D. mauriziae Esteves & Hofacker (2011: 39), and  D. mirandiana Leme & Miranda (2009: 75)are exceptions, because their leaves are distichously disposed and flabellate, with the plants being more or less prostrate. However, despite sharing the same leaf conformation, these species are not at all similar when considering flower morphology. Since many species of  Dyckiaare known by fragmented typespecimens, in which leaves or leaf-rosettes are not completely documented, it may be possible that other unrelated taxa have that same unique flabellate shape. So, the discovery of a new species, like  D. pottiorum, with such an unusual leaf disposition requires a carefull evaluation in order to avoid the almost irresistible tendency to only compare it with known species that share such a distinctive attribute.   FIGURE 11. A–F.  Dyckia pottiorum( Leme et al. 8579). A. Leaf blade. B. Floral bract. C. Flower. D. Sepal. E. Petal and stamen. F. Pistil. G–L.  Dyckia rondonopolitana( Kranz 123). G. Basal portion of the leaf. H. Floral bract. I. Flower. J. Sepal. K. Petal and stamens. L. Pistil. Scale bars = 1 cm, except for L, bar = 0.4 cm.   Dyckia pottiorumis morphologically related to  D. burchellii Baker (1889: 131)and  D. coximensisL.B.Sm. & Reitz(in Smith 1970: 282), both from the states of Goiásand Mato Grosso do Sul, respectively, Central Brazil. When compared to  D. burchellii, this new species differs by the leaf blades sparsely spinose toward the apex (vs. entire), inflorescence densely flowered (vs. laxly flowered), and basal floral bracts distinctly shorter than the sepals (vs. longer than the flowers). On the other hand,  D. pottiorumcan be distinguished from  D. coximensisby the basal floral bracts distinctly shorter than the sepals (vs. equaling the sepals), flowers more numerous (11 to 18 vs. ca. 6 innumber), ecarinate sepals (vs. only the posterior ones carinate), and by the subtubular corolla (vs. campanulate). The known population of  D. pottiorumis composed of bronze colored to reddish-leafed specimens intermingled with green-leafed ones. The flower color also varies naturally within populations from orange to yellowish-orange. [238,848,594,617] MS Brazil Corguinho 17 26 MS 080 1 Mato Grosso do Sul 2011-09-16 E Brazil 99493 -19.731611 Rio Negro 1 -54.912556 Corguinho 17 26 1 Mato Grosso do Sul [764,1256,626,649] RB, HB Brazil Leme 17 26 1 Mato Grosso do Sul holotype MS Brazil Corguinho 19 28 MS 080 2 Mato Grosso do Sul paratype 2011-09-16 RB Brazil 99493 -19.731611 Rio Negro 1 -54.912556 Corguinho 19 28 1 Mato Grosso do Sul