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13 results for “Dictyanthus”
FIGURE 4 in Another remarkable new species of Dictyanthus (Apocynaceae, Asclepiadoideae, Asclepiadeae, Gonolobinae) with a long stylar head from Mexico
FIGURE 4. Dictyanthus unicornus (A) and morphologically similar species. B. Dictyanthus ceratopetalus. C. Dictyanthus eximius. D. Dictyanthus lautus. E. Dictyanthus macvaughianus. F. Dictyanthus nichongus. G. Dictyanthus pavonii. Credits: A) Fernando Pío-León, B) Oliver Komar, C), D) and G) Leonardo Alvarado-Cárdenas, E) David Juárez García, F) Raúl Sánchez.
FIGURE 1. Dictyanthus unicornus A. Branch segment with inflorescence and flower bud. B in Another remarkable new species of Dictyanthus (Apocynaceae, Asclepiadoideae, Asclepiadeae, Gonolobinae) with a long stylar head from Mexico
FIGURE 1. Dictyanthus unicornus A. Branch segment with inflorescence and flower bud. B. Detail of leaf base with colleters. C. Flower. D. Longitudinal section of the flower. E. Apex of the stylar head. F. Pollinaria. G. Fruit. Illustration of Quiyahuitl Colibrí Fernández Armendáriz, based on holotype J. F. Pío-León & M. G. Millán-Otero 375.
FIGURE 2. Dictyanthus unicornus A. Branch with leaves. B. Leaves and flower bud. C in Another remarkable new species of Dictyanthus (Apocynaceae, Asclepiadoideae, Asclepiadeae, Gonolobinae) with a long stylar head from Mexico
FIGURE 2. Dictyanthus unicornus A. Branch with leaves. B. Leaves and flower bud. C. Top view of flower. D. Lateral view of flower. E. Fruit. Credits: J. F. Pío-León.
Phylogenetic analysis of the new species Dictyanthus reflexiflorus
<p>A new species of <em>Dictyanthus</em> from the state of Michoacán, Mexico, is described and illustrated: <strong><em>Dictyanthus reflexiflorus </em></strong><strong>sp. nov.</strong> It grows in tropical deciduous forest located in the municipality of Tacámbaro. A phylogenetic analysis based on molecular data (plastid regions trnL-trnF and rps 16) was conducted to explore the relationships of the new species. Results place the new species in <em>Dictyanthus</em>, congruent with its morphology. Characters that support this relationship are the presence of uncinate hairs, a reticulate corolla, and a gynostegial corona basally fused to the stipe of the gynostegium and partially or completely fused to the corolla tube. The species has unique characteristics within the genus, such as a reflexed corolla and the presence of slits along the corolla lobes. A key to distinguish <em>Dictyanthus reflexiflorus </em>from congeners in the state of Michoacán is included.</p>
FIGURE 3 in A remarkable new species of Dictyanthus (Apocynaceae, Asclepiadoideae, Asclepiadeae, Gonolobinae) restricted to Jalisco, México
FIGURE 3. Select species of Dictyanthus from Jalisco. A. Inflorescence of Dictyanthus nichongus B. Lateral view of Dictyanthus nichongus C. Dictyanthus asper. D. Dictyanthus macvaughianus. E. Dictyanthus parviflorus. F. Dictyanthus pavonii. G. Dictyanthus reticulatus. H. Dictyanthus sepicola. I. Dictyanthus tuberosus. Credits: Antonio Reyes (A), Raúl Sánchez (B), Luis Humberto Vicente Rivera (C), Eduardo Magaña (D), Warren Douglas Stevens 1399 (© 1998 Missouri Botanical Garden) (E), Leonardo Alvarado-Cárdenas (F–G), Pablo Carrillo Reyes (H, I).
FIGURE 1. Dictyanthus nichongus A. Branch with leaves and inflorescences. B in A remarkable new species of Dictyanthus (Apocynaceae, Asclepiadoideae, Asclepiadeae, Gonolobinae) restricted to Jalisco, México
FIGURE 1. Dictyanthus nichongus A. Branch with leaves and inflorescences. B. Apical view of the flower. C. Fruit. D. Fly visiting the flower. Credits: Antonio Reyes (A, C), Raúl Sánchez (B, D)
FIGURE 2. Dictyanthus nichongus A in A remarkable new species of Dictyanthus (Apocynaceae, Asclepiadoideae, Asclepiadeae, Gonolobinae) restricted to Jalisco, México
FIGURE 2. Dictyanthus nichongus A. Branch of the inflorescence with peduncle, bracts, pedicels, and flower buds. B. Apical view of the flower. C. Abaxial pubescence of the sepal. D. Abaxial pubescence of the corolla. E. Longitudinal section of the flower. F. Gynostegial corona. G. Pollinarium. Abbreviations: A: anther. Br: bract. FB. Flower bud. GC: gynostegial corona. P. pedicel. Pd. Peduncle S: sepal. Sp: septum. SH: stylar head. US. Union to the stipe of gynostegium. Based on type specimen.
FIGURE 1. Dictyanthus stevensii. A in Dictyanthus stevensii (Apocynaceae; Asclepiadoideae; Gonolobinae), a new species from Chimalapas region, Oaxaca, Mexico
FIGURE 1. Dictyanthus stevensii. A. Habit of the plant with inflorescences; B. Flower; C. Corona and gynostegium; D. Pollinarium. A‒D based on Salomón Maya J. 3463 (MEXU) (Illustrated by César Adrián González Martínez).
FIGURE 4 in Dictyanthus stevensii (Apocynaceae; Asclepiadoideae; Gonolobinae), a new species from Chimalapas region, Oaxaca, Mexico
FIGURE 4. Known distribution of Dictyanthus stevensii (black dot), and species morphologically akin, D. eximius (green dots), D. hamatus (red dots), and D. tuberosus (blue dots). State of Oaxaca and location of the priority region (RTP) "Selva Zoque - La Sepultura" in box.
FIGURE 3 in Dictyanthus stevensii (Apocynaceae; Asclepiadoideae; Gonolobinae), a new species from Chimalapas region, Oaxaca, Mexico
FIGURE 3. Morphological comparison of the flower of some species of Dictyanthus related to Dictyanthus stevensii, based on herbarium specimens. A. D. hamatus, Diego 6672 (FCME); B. D. eximius, Stevens 26651 (MEXU); C. D. tuberosus, Pringle 4482 (MEXU); E. D. stevensii, Salomón Maya J. 3463 (MEXU); bar 1 cm.
FIGURE 2 in Dictyanthus stevensii (Apocynaceae; Asclepiadoideae; Gonolobinae), a new species from Chimalapas region, Oaxaca, Mexico
FIGURE 2. Holotype of Dictyanthus stevensii. A. Herbarium specimen showing the inflorescences in monochasia and the size of flowers; bar 4 cm; B. Base of the blade abaxially, with three colleters and petiole with mixed indumentum of short straight trichomes and uncinated trichomes; C. Flower. The parallel vertical venation can be observed in the tube of the corolla; bar 2.5 mm; D. Corolla with concentric venation in the limb and reticulated towards the lobes with short straight trichomes on the veins; showing the gynostegium. The corpusculum and the apex of one lobe of the corona are shown exerting the corolla tube; bar 2.5 mm.
Phylogenetic analysis of the new species Dictyanthus reflexiflorus
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FIGURE 3 in Another remarkable new species of Dictyanthus (Apocynaceae, Asclepiadoideae, Asclepiadeae, Gonolobinae) with a long stylar head from Mexico
FIGURE 3. Distribution map of Dictyanthus unicornus and morphologically similar species.
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