diff --git a/data/31/1C/E1/311CE11D3420FFEBF6F801F10BBCE33E.xml b/data/31/1C/E1/311CE11D3420FFEBF6F801F10BBCE33E.xml new file mode 100644 index 00000000000..eff0c0078a9 --- /dev/null +++ b/data/31/1C/E1/311CE11D3420FFEBF6F801F10BBCE33E.xml @@ -0,0 +1,473 @@ + + + +A new nothospecies of Prosthechea (Orchidaceae: Laeliinae) from the Diamantina Plateau, Minas Gerais, Brazil + + + +Author + +Vieira, Tiago L. +0000-0003-0286-8906 +Harvard University Herbaria, 22 Divinity Avenue, Cambridge, MA 02138, USA. +tiagolvs@gmail.com + + + +Author + +Viotti, Julia +0000-0002-4495-4565 +University of Neuchâtel, 11 Emile-Argand St., Neuchâtel, CH- 2000, Switzerland. +j.viotti.c@gmail.com + + + +Author + +Menezes, Euler L. F. +0000-0002-1861-9552 +Universidade Federal dos Vales do Jequitinhonha e Mucuri, Rodovia MGT 367 - km 583, nº 5000, 39100 - 000, Diamantina, Minas Gerais, Brazil. +euler.menezes@ufvjm.edu.br + +text + + +Phytotaxa + + +2024 + +2024-09-24 + + +665 + + +3 + + +282 +290 + + + + +https://doi.org/10.11646/phytotaxa.665.3.10 + +journal article +10.11646/phytotaxa.665.3.10 +1179-3163 +14517066 + + + + + +Prosthechea +× +riopretensis +T.L.Vieira & E.L.F.Menezes + +, + +nothosp. nov. + + + + + +( +Figures 3–4 +) + + + + +Type: +— + +BRAZIL +. +Minas Gerais +: +São Gonçalo do Rio Preto +, capão na beira do parque, + +1549 m +a.s.l. + +, + +28 July 2023 + +, fl., + +E.L.F. Menezes +935 + +( +holotype +: HDJF [barcode 00010667]; isotypes: BHCB, BHZB, HUEFS) + +. + + + + +A putative natural hybrid between + +Prosthechea calamaria + +and + +P. faresiana + +combining features of both parents, with shape and dimensions of both vegetative and floral traits reflecting the former, such as short plants (≤ +19 cm +height) and inflorescences (≤ +7 cm +long), and flowers with small ovate lips (blade ≤ +1 cm +long), whereas the color of sepals and petals remarkably match with the latter, where the internal surface of sepals and petals are covered with vinaceous longitudinal stripes, representing a color pattern never seen within the floral variation of + +P. calamaria + +. + + +Description +:—Epiphytic +herb, +rhizomatous, +11–19 cm +height. +Rhizome +conspicuous, 2–2.5 × +0.3–0.4 cm +. Roots white, glabrous, flexuous, ca. +2 mm +diameter. +Pseudobulbs +green, heteroblastic, fusiform, smooth, stipitate, the base covered by scarious sheaths, 5.0–6.5 × +0.6–0.8 cm +, 2-leaved. +Leaves +green, subcoriaceous, lanceolate or narrowly oblong, 6.5–12.0 × 1.0– +1.5 cm +, acute. + +Spathe + +conduplicate, elliptic, 1.0–1.2 × +0.4–0.8 cm +, obtuse. +Inflorescence +erect, 6.0–7.0 cm long, 4–6-flowered; +bracts +deltoid or triangular, embracing the rachis and pedicel. +Flowers +non-resupinate, delicate, greenish white to yellowish, covered by vinaceous longitudinal stripes; +pedicel ++ ovary greenish, narrowly oblong, 1.0–1.2 × +0.3–0.4 cm +. +Sepals +greenish white to yellowish, covered by blurry longitudinal vinaceous stripes on internal surface; +dorsal sepal +lanceolate, 1.2–1.7 × +0.3–0.5 cm +, acute or acuminate; +lateral sepals +oblong-lanceolate, slightly falcate, 1.2–1.7 × +0.3–0.5 cm +, acuminate. +Petals +greenish white to yellowish, covered by blurry longitudinal vinaceous stripes on adaxial internal surface, oblanceolate, 1.0–1.5 × +0.2–0.3 cm +, acuminate. +Lip +entire, clawed, white with vinaceous maculae surrounding the callus, the blade ovate, 0.7–1.0 × +0.4–0.6 cm +, shortly acuminate; callus white, elevated, pad-like, pubescent at the base, ca. 4.5 × +2.2 mm +. +Column +greenish at the base becoming whitish towards the apex, with some faint vinaceous dots and stripes on the dorsal side, shortly claviform, gibbous, 0.6–0.7 × +0.3–0.4 cm +; +stigmatic cavity +obcordiform; +clinandrium +3-toothed, all teeth acute, the midtooth eventually laciniate, and bearing a fleshy, knob-like, dorsal appendix. +Anther +yellow, obloid, ca. 1.1 × +0.9 mm +; +pollinia +4, yellow, discoid, laterally flattened. +Capsule +not seen in mature state, but green and triquetrous, as typical for the genus, while still on development. + + + + +Distribution and ecology: +— + +Prosthechea +× +riopretensis + +is known only from the +type +locality in the surroundings of Rio Preto State Park (Parque Estadual do Rio Preto), municipality of São Gonçalo do Rio Preto, +Minas Gerais +, +Brazil +. It was found in a forest patch (capão de mata) associated to +campos rupestres +formations, at an elevation of ~ +1500 m +a.s.l., occurring as epiphyte. Regarding the putative parents, + +Prosthechea calamaria + +occurs in the Espinhaço Range inhabiting both forests and +campos rupestres +formations, with records concentrated in the Serra do Cipó region. Although there are no herbarium records of the species from Rio Preto State Park or surroundings, a field observation at Serra da Bicha, within the +Diamantina Plateau +at the municipality of Serro, is confirmed by one of the authors (ELFM). + +Prosthechea faresiana + +is usually found only on the exposed quarzitic outcrops of the +campos rupestres +, generally as a litophyte, and seems to be endemic to the +Diamantina Plateau +region ( +Figure 2 +). We could just find one hybridization zone, which corresponds to the forest patch (capão de mata) of the +type +locality. Unfortunately, there is no available information about pollinators for either the new nothospecies or its putative parents. + + + +Prosthechea +× +riopretensis + +was found flowering +in situ +in July, whereas in cultivation it flowered from April to July with some plants starting to develop fruits in May. Regarding the putative parents, herbarium records of + +P. calamaria + +in the Espinhaço Range indicate flowering period ranging from May to September, with fruits in September as well, whereas in + +P. faresiana + +the flowering goes from April to October, with no herbarium specimens presenting fruits among the examined material. + + + + +Etymology: +—The epithet + +“ +riopretensis + +” refers to the municipality of the +type +locality, São Gonçalo do Rio Preto. + + + + +Taxonomic discussion: +—We are proposing the taxon as a natural hybrid considering its morphological features, matching with two other species of the genus that occur in the region: + +Prosthechea calamaria + +and + +P. faresiana + +. The shape and dimensions of both vegetative and floral traits of the new nothospecies overlap with the former, whereas its floral color pattern remarkably match with the latter. Noteworthy, this floral color pattern has never been seen in + +P. calamaria + +across its distribution. + +Prosthechea ×riopretensis + +can be distinguished from + +P. calamaria + +by the color of the flowers (sepals and petals covered by vinaceous stripes on the internal surface vs. entirely white or creamish white, eventually vinaceous maculate at the base), and from + +P. faresiana + +mostly by plant size (≤ 18 +vs +. ≥ +20 cm +height), pseudobulb diameter (0.6–0.8 +vs +. +1.8–2.3 cm +), leaf width (≤ 1.5 +vs +. ≥ 2.0 cm), inflorescence length (≤ 7.0 +vs +. ≥ +12.5 cm +), petal width (≤ 3 +vs +. ≥ +5 mm +), and lip’s blade shape and width (ovate, +0.4–0.6 cm +width +vs +. widely obovate or subcircular, 0.8–1.0 cm width). A full comparison of the main vegetative and floral traits in + +P. +× +riopretensis + +and its putative parents is presented on +Table 1 +. + + + +FIGURE 3. +Composite Digital Plate of + +Prosthechea ×riopretensis + +. +A. +Habit. +B. +Detail of a sympodium bearing an inflorescence. +C. +Flower, frontal view. +D. +Flower in ¾ view. +E. +Detail of the column and lip in front view. +F. +Floral dissection: F1. Dorsal sepal; F2. Lateral sepals; F3. Petals; F4. Lip. +G +and +H. +Lateral view of the pedicel+ovary and column with and without lip attached, respectively. +J. +Detail of the anther cap. +K. +Detail of the pollinia. (Designed by JV). + + + + +FIGURE 4. +Holotype sheet of + +Prosthechea ×riopretensis + +. Courtesy of the herbarium HDJF. + + + +Additional specimens examined: +— + +Prosthechea calamaria + +— +BRAZIL +. +Minas Gerais +: +sine loco acurato +, 1934, fl., +s. leg. +(RB, barcode 00259528); Conceição do Mato Dentro, Parque Natural Municipal do Ribeirão do Campo, +23 April 2003 +, fl., +R.C. Mota et al. 2560 +(BHCB); Jaboticatubas, Serra do Cipó, +3 May 2005 +, fl., +A.P.P. Barbero 32 +(SP); +ibid. +, +5 July 2006 +, fl., +A.P.P. Barbero 45 +(SP); +ibid. +, +5 July 2006 +, fl., +A.P.P. Barbero 44 +(SP); +ibid. +, +12 July 1940 +, fl., +M. Foster & R. Foster 619 +(AMES); +ibid. +, fl. in cult., +July 2018 +, fl., +T.L. Vieira 467 +(HUEFS); Santana de Pirapama, Serra do Cipó, acesso pela Faz. Inhame, trilha da senhorinha, +28 February 2009 +, fl., +D.C. Zappi et al. 1672 +(RB, SPF); Juiz de Fora, 1879, fl., +R.F.H. Wawra 173a +(W); Ouro Preto, Campo Grande, +s.d. +, fl., +s. leg. +(OUPR 8736); Rio Preto, Serra Negra, trilha para o Burro de Ouro, +21 May 2006 +, fl., + +A.L. +Santiago +3 + +(CESJ); Santana do Riacho, Serra do Cipó, +10 April 1980 +, fl., +F. de Barros 224 +(SP); Serra do Cipó, estrada MG-010 ca. +400 m +antes da bifurcação entre o Morro do Pilar e Conceição do Mato Dentro, +22 September 1993 +, fr., +M.T.V.A. Campos & E.D.P. de Souza CFSC13396 +(SP, SPF); PARNA Serra do Cipó, próximo à estrada do Juquinha, +13 June 2009 +, fl., +J.E.Q. Faria et al. 543 +(UB); Sete Lagoas, Serra do Cipó, +s.d. +, st., +s. leg. +(RB); Serra do Cipó, 20 June, fl., +L. Damazio s.n. +(RB). + + + + \ No newline at end of file