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42 results for “Dioscoreaceae”
Fig. 1 in The effect of food source on survival and development of Lilioceris cheni (Coleoptera: Chrysomelidae), a biological control agent of air potato (Dioscoreales: Dioscoreaceae)
Fig. 1. Percentage survival (mean ± SE) of Lilioceris cheni from 3rd instar to adult when reared on leaves, brown bulbils, or tan bulbils of air potato.
Data from: Latitudinal environmental niches and riverine barriers shaped the phylogeography of the central Chilean endemic Dioscorea humilis (Dioscoreaceae)
The effects of Pleistocene glaciations and geographical barriers on the phylogeographic patterns of lowland plant species in Mediterranean-climate areas of Central Chile are poorly understood. We used Dioscorea humilis (Dioscoreaceae), a dioecious geophyte extending 530 km from the Valparaíso to the Bío-Bío Regions, as a case study to disentangle the spatio-temporal evolution of populations in conjunction with latitudinal environmental changes since the Last Inter-Glacial (LIG) to the present. We used nuclear microsatellite loci, chloroplast (cpDNA) sequences and environmental niche modelling (ENM) to construct current and past scenarios from bioclimatic and geographical variables and to infer the evolutionary history of the taxa. We found strong genetic differentiation at nuclear microsatellite loci between the two subspecies of D. humilis, probably predating the LIG. Bayesian analyses of population structure revealed strong genetic differentiation of the widespread D. humilis subsp. humilis into northern and southern population groups, separated by the Maipo river. ENM revealed that the ecological niche differentiation of both groups have been maintained up to present times although their respective geographical distributions apparently fluctuated in concert with the climatic oscillations of the Last Glacial Maximum (LGM) and the Holocene. Genetic data revealed signatures of eastern and western postglacial expansion of the northern populations from the central Chilean depression, whereas the southern ones experienced a rapid southward expansion after the LGM. This study describes the complex evolutionary histories of lowland Mediterranean Chilean plants mediated by the summed effects of spatial isolation caused by riverine geographical barriers and the climatic changes of the Quaternary.
Fig. 1 in Species ofXystusSchönherr (Coleoptera: Curculionidae: Baridinae) are Seed Predators of Wild Yams (Dioscoreaceae) in Central Mexico
Fig. 1. Xystus gracilirostris on fruit capsule of Dioscorea sparsiflora. Oviposition puncture of weevil is present in lower right on fruit capsule.
FIGURE 1 in Dioscorea magnibracteata (Dioscoreaceae), a new species from western Ecuador based on the unpublished work of Temple Clayton
FIGURE 1. Dioscorea magnibracteata: A. Vine with staminate flowers and leaf blade, abaxial view. B. Tuber, bearing one meristematic point. C. Staminate flower. D. Terminal part of inflorescence bearing two flower buds and one open mature flower (note the relatively large floral bracts and valvate aestivation of corolla, both from abaxial view); the androecium composed of six stamens with orange anthers at upper right. E. Terminal part of pendulous pistillate inflorescence. F. Immature fruits on the axis of the infructescence. A–F, photos by Xavier Cornejo, from the paratype Cornejo & Josse 9363 (GUAY).
FIGURE 2 in Dioscorea magnibracteata (Dioscoreaceae), a new species from western Ecuador based on the unpublished work of Temple Clayton
FIGURE 2. Geographic distribution of Dioscorea magnibracteata, showing the protected areas in the occurrence region.
FIGURE 2. Dioscorea flabellispina. A in Dioscorea flabellispina (Dioscoreaceae), a new endangered species from the Brazilian Atlantic Rainforest
FIGURE 2. Dioscorea flabellispina. A. Habit (Staminate plant). B. Tubers. C. Fan-like thorns. D. Staminate inflorescence. E. Staminate flower. F. Fruits. G. Seed. Photographs by R.S. Couto.
FIGURE 1. Dioscorea flabellispina. A. Staminate plant. B–C. Staminate flower. D. Staminate inflorescence. E. Underground system. F. Fan-like thorns. G. Pistillate plant with fruits. H. Fruit. I in Dioscorea flabellispina (Dioscoreaceae), a new endangered species from the Brazilian Atlantic Rainforest
FIGURE 1. Dioscorea flabellispina. A. Staminate plant. B–C. Staminate flower. D. Staminate inflorescence. E. Underground system. F. Fan-like thorns. G. Pistillate plant with fruits. H. Fruit. I. Seed. Illustration by R. Dana.
FIGURE 1 in Lectotypification of Dioscorea vexans (Dioscoreaceae), an endemic and rare species from Andaman and Nicobar Islands, India
FIGURE 1. Dioscorea vexans Prain & Burkill (Dr. King's Collector s.n. [K000098221, image!], K; Lectotype) (http://specimens.kew. org/herbarium/K000098221) [© The Board of Trustees of the Royal Botanic Gardens, Kew. Reproduced with the consent of the Royal Botanic Gardens, Kew].
FIGURE 3 in The threatened Dioscorea galiiflora and the identification of Dioscorea triangularis (Dioscoreaceae): Solving a secular imbroglio
FIGURE 3. Architecture of Inflorescences: A-B. Scheme of a compound inflorescence with cincinnus in lateral (A) and upper (B) view. C. Scheme of raceme in lateral view. D-E. Cincinnus of D. galiiflora (Hoehne 1625, B) and D. moyobambensis (Weberbauer 4621, B), respectively. F. Raceme of D. piperifolia complex (Pohl s.n., M213505). Photographs by R.S. Couto.
FIGURE 2 in The threatened Dioscorea galiiflora and the identification of Dioscorea triangularis (Dioscoreaceae): Solving a secular imbroglio
FIGURE 2. Floral morphology: A. Scheme of a 1-nerved, lanceolate tepal of D. moyobambensis; B. Scheme of a 3-nerved, obovate tepal of D. galiiflora. C. Scheme of a 3-nerved, oblong tepal of D. piperifolia complex. D. Flower of D. moyobambensis with 1-nerved, lanceolate tepals and sub-sessile stamens (Weberbauer 4621, B). E. Flower of D. galiiflora with 3-nerved, obovate tepals and sessile stamens (Hoehne 1625, B). F. Flower of D. piperifolia complex with 3-nerved, oblong tepals and sessile stamens (Pohl s.n., M213505). Photographs by R.S. Couto.
FIGURE 1 in The threatened Dioscorea galiiflora and the identification of Dioscorea triangularis (Dioscoreaceae): Solving a secular imbroglio
FIGURE 1. Distribution map of the Dioscorea piperifolia complex, D. galiiflora and D. moyobambensis.
FIGURE 3 in Dioscorea sphaeroidea (Dioscoreaceae), a threatened new species from the highaltitude grasslands of southeastern Brazil with wingless seeds
FIGURE 3: Dioscorea sphaeroidea. A. Habit. B. Tubers. C. Staminate flower. D. Pistilate flower. E. Immature fruits. F. Seed. Photographs by R.S. Couto.
FIGURE 2 in Dioscorea sphaeroidea (Dioscoreaceae), a threatened new species from the highaltitude grasslands of southeastern Brazil with wingless seeds
FIGURE 2: Dioscorea sphaeroidea. A. Habit. B. Staminate plant. C. Secondary axis of the staminate inflorescence. D. Staminate flower. E. Right-twining stem. F. Pistilate plant. G-H. Pistilate flower. I-J. Fruit. K-L. Seed. Drawn by R. Dana.
FIGURE 1 in Dioscorea sphaeroidea (Dioscoreaceae), a threatened new species from the highaltitude grasslands of southeastern Brazil with wingless seeds
FIGURE 1: The habitat of Dioscorea sphaeroidea in high-altitude grasslands of Serra dos Órgãos National Park, southeastern Brazil. Photograph by R.S. Couto.
FIGURE 3 in Typification of four names of Dioscorea (Dioscoreaceae) from India
FIGURE 3. Lectotype of Dioscorea oppositifolia L. (Hermann s.n., BM000621848, ©Trustees, The Natural History Museum, London)
FIGURE 2 in Typification of four names of Dioscorea (Dioscoreaceae) from India
FIGURE 2. Lectotype of Dioscorea kalkapershadii Prain & Burkill (Kalka Prashad 34323, K000098199, ©RBG, Kew)
FIGURE 4 in Typification of four names of Dioscorea (Dioscoreaceae) from India
FIGURE 4. Lectotype of Dioscorea velutipes Prain & Burkill (W.A. Robertson 354, K001142146, ©RBG, Kew).
Data from: Latitudinal environmental niches and riverine barriers shaped the phylogeography of the central Chilean endemic Dioscorea humilis (Dioscoreaceae)
Open the record for dataset details and reuse information.
Fig. 2 in The effect of food source on survival and development of Lilioceris cheni (Coleoptera: Chrysomelidae), a biological control agent of air potato (Dioscoreales: Dioscoreaceae)
Fig. 2. Development time (mean ± SE) of Lilioceris cheni from 3rd instar to adult when reared on leaves or brown bulbils of air potato.
FIGURE 3 in Dioscorea flabellispina (Dioscoreaceae), a new endangered species from the Brazilian Atlantic Rainforest
FIGURE 3. Distribution map of Dioscorea flabellispina.
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