1,721,678 research outputs found
A new species of fleshy-fruited<i>Begonia</i>(Begoniaceae) from the Masoala Peninsula, Madagascar
No full textHughes, Mark (2011): A new species of fleshy-fruited Begonia (Begoniaceae) from the Masoala Peninsula, Madagascar. Adansonia (3) 33 (1): 81-85, DOI: 10.5252/a2011n1a4, URL: http://dx.doi.org/10.5252/a2011n1a
FIG. 1. — A, Begonia masoalaensis M in A new species of fleshy-fruited Begonia (Begoniaceae) from the Masoala Peninsula, Madagascar
No full textFIG. 1. — A, Begonia masoalaensis M. Hughes, sp. nov., bearing two female flowers with the scars of the shed male portion of the inflorescence below: B, cross section of ovary; C, male flower. Scale bars: A, C, 1 cm; B, 5 mm.Published as part of Hughes, Mark, 2011, A new species of fleshy-fruited Begonia (Begoniaceae) from the Masoala Peninsula, Madagascar, pp. 81-85 in Adansonia (3) 33 (1) on page 83, DOI: 10.5252/a2011n1a4, http://zenodo.org/record/459921
Fig. 11. Begonia annulata K.Koch. A–B. Leaf. C. Male flower. D–E in A revision and one new species of Begonia L. (Begoniaceae, Cucurbitales) in Northeast India
No full textFig. 11. Begonia annulata K.Koch. A–B. Leaf. C. Male flower. D–E. Fruit. Photographs courtesy of Darrin Norton of a plant in cultivation in a private collection.Published as part of Camfield, Rebecca & Hughes, Mark, 2018, A revision and one new species of Begonia L. (Begoniaceae, Cucurbitales) in Northeast India, pp. 1-116 in European Journal of Taxonomy 396 on page 19, DOI: 10.5852/ejt.2018.396, http://zenodo.org/record/378704
Fig. 4. Leaf tracings. A. Group 5 in A revision and one new species of Begonia L. (Begoniaceae, Cucurbitales) in Northeast India
No full textFig. 4. Leaf tracings. A. Group 5: ovate and symmetric to slightly asymmetric leaves. B. Group 6: ovate, asymmetric and shallow dentate to denticulate leaves. C. Group 7: lanceolate (deltoid) and symmetric leaves.Published as part of Camfield, Rebecca & Hughes, Mark, 2018, A revision and one new species of Begonia L. (Begoniaceae, Cucurbitales) in Northeast India, pp. 1-116 in European Journal of Taxonomy 396 on page 6, DOI: 10.5852/ejt.2018.396, http://zenodo.org/record/378704
Fig. 66. Begonia xanthina Hook. A. Dark leaf form. B. Male flowers. C in A revision and one new species of Begonia L. (Begoniaceae, Cucurbitales) in Northeast India
No full textFig. 66. Begonia xanthina Hook. A. Dark leaf form. B. Male flowers. C. Female flowers. Photographs courtesy of Darrin Norton of a plant in cultivation in a private collection.Published as part of Camfield, Rebecca & Hughes, Mark, 2018, A revision and one new species of Begonia L. (Begoniaceae, Cucurbitales) in Northeast India, pp. 1-116 in European Journal of Taxonomy 396 on page 103, DOI: 10.5852/ejt.2018.396, http://zenodo.org/record/378704
Modified chalcogenide glasses for optical device applications
Full text linkThis thesis focuses on two different, but complementary, aspects of the modification of gallium lanthanum sulphide (GLS) glasses. Firstly the addition of transition metal ions as dopants is examined and their potential for use as active optical materials is explored. It is also argued that the spectroscopic analysis of transition metal ions is a useful tool for evaluating the local environment of their host. Secondly femtosecond (fs) laser modification of GLS is investigated as a method for waveguide formation. Through optical characterisation of fs laser written waveguides in GLS, a formation mechanism has been proposed. Tunnelling has been identified as the dominant nonlinear absorption mechanism in the formation of the waveguides. Single mode guidance at 633 nm has been demonstrated. The writing parameters for the minimum propagation loss of 1.47 dB/cm are 0.36 µJ pulse energy and 50 µm/s scanning speed. The observation of spectral broadening in these waveguides indicates that they may have applications for nonlinear optical devices. Fs laser written waveguides in transition metal doped GLS could lead to broadband active optical devices
FIGURE 1 in Two new records of Begonia for the flora of India from Arunachal Pradesh
No full textFIGURE 1. Distribution map of B. asperifolia and B. medogensis in Arunachal Pradesh, India.Published as part of Taram, Momang, Borah, Dipankar & Hughes, Mark, 2023, Two new records of Begonia for the flora of India from Arunachal Pradesh, pp. 115-120 in Phytotaxa 584 (2) on page 116, DOI: 10.11646/phytotaxa.584.2.4, http://zenodo.org/record/763929
Begonia rubella Buch.
No full textBegonia rubella Buch. -Ham. ex D.Don [sect. Diploclinium] Prodromus Florae Nepalensis: 223 (Don 1825). – Type: Nepal, 10 Sep. 1802, Buchanan-Hamilton s.n. (holo-: BM000521517). Description This species is similar to B. dioica, and both species can be found in the neighbouring countries of Nepal and Myanmar. They are similar vegetatively but B. rubella has much smaller flowers that are similar in size to those of B. ovatifolia.Published as part of Camfield, Rebecca & Hughes, Mark, 2018, A revision and one new species of Begonia L. (Begoniaceae, Cucurbitales) in Northeast India, pp. 1-116 in European Journal of Taxonomy 396 on pages 105-106, DOI: 10.5852/ejt.2018.396, http://zenodo.org/record/378704
Begonia trichocarpa Dalzell 1851
No full textBegonia trichocarpa Dalzell [sect. Reichenheimia] Hooker’s Journal of Botany and Kew Garden Miscellany 3: 230 (Dalzell 1851). – Type: India: Bombay, Dalzell s.n. (iso-: K000761461). Citation in other publications Dash (2010: 41). Material cited INDIA: Arunachal-Pradesh: Lee to Purchi village, Dash 31492 (ARUN n.v.). Taxonomic remarks This species is native to Southern India, near Bombay and its occurrence in Northeast India is unlikely.Published as part of Camfield, Rebecca & Hughes, Mark, 2018, A revision and one new species of Begonia L. (Begoniaceae, Cucurbitales) in Northeast India, pp. 1-116 in European Journal of Taxonomy 396 on page 107, DOI: 10.5852/ejt.2018.396, http://zenodo.org/record/378704
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