Yogesh Joshi

During the course of field surveys and col-lection of lichens from Madhya Pradesh, Central India, and studies of specimens pre-served in the lichen herbarium of National Botanical Research Institute (LWG), the authors have encountered a new species of Caloplaca. The new ...

Abstract Pilophorus fruticosus Li S. Wang & Xin Y. Wang is described from south-west China. It is characterized by the presence of densely dichotomously branched, partly decorticated pseudopodetia, and by having single, spherical apothecia on the apices of ...

The lichen genus Caloplaca is divided into various sections, of which section Sideritis is characterized by saxicolous species with well developed grey, whitish or brown thalli lacking anthraquinones and red or orange apothecia with anthraquinone pigments (Wetmore, 1996). Of the 111 ...

Joshi, Y. & DK Upreti (2008): Sorediate and isidiate species of the lichen genus Caloplaca (Ascomycetes, Teloschistaceae) from India. - Nova Hedwigia 86: 259-272. Abstract: Caloplaca species with vegetative diaspores occurring in India are revised. Ten sorediate and four ...

The warm, dry climate in central India provides suitable conditions for the growth of many crustose lichens, including Caloplaca species. A new species, Caloplaca awasthii Joshi, Y. & Upreti, is described from this region, where it is found growing in rocky areas of Madhya Pradesh ( ...

We study the aging behavior of aqueous laponite suspension, a model soft glassy material, in creep. We observe that the viscoelastic behavior is time dependent and is strongly influenced by the deformation field; the effect is known to arise due to aging and rejuvenation. We show that irrespective of the strength of the deformation field (shear stress) and age, when the imposed time scale is normalized with a dominating relaxation mode of the system, universal aging behavior is obtained, demonstrating time-stress superposition, a phenomenon that may be generic in a variety of soft materials.