Floristic composition and biological spectrum of weeds in agro-climatic zone of Nalbari district, Assam, India

Abstract

Present paper deals with the study of floristic composition and biological spectrum of the agro-climatic zone of Nalbari district of Assam. Field observation encompasses a total of 217 weed species from both angiosperms and pteridophytes belonging to 150 genera under 60 families. Asteraceae, being the largest family possesses 19 genera and 22 species. Out of the total species, 183 species (84.33 %) showed the annual life span as against 34 species (15.67 %) showing the perennial life span. One hundred thirty eight species (63.59 %) were recorded to be propagated by seeds/spores; 66 species (30.41 %) were found to opt for both seeds and vegetative propagules and only 13 species (5.99 %) were listed to be propagated exclusively by vegetative propagules. The phytoclimate of the agro-climatic zone can be regarded as thero-cryptophytic since major percentage of the species falls under the life forms Therophytes and Cryptophytes which has been assessed after comparison with the normal world spectrum as proposed by Raunkiaer.

Quantitative ethnomedicinal investigation of medicinal plants used by traditional healers to treat various diseases in the district Dindori, Madhya Pradesh, India

“…The life form surrounding the species was investigated utilizing the flora of Madhya Pradesh, which provided the results (Singh et al, 2001). Our findings were in line with a number of research from Madhya Pradesh and other regions of the globe, where it has been reported that trees are the most often used plant species by locals and professionals (Thakur et al, 2015;Lawal et al, 2020;Kacholi and Amir, 2022). The wide diversity of trees in the environment is the reason why local populations in the region continue to employ herbal medicines as trees (Sharma et al, 2021;Mujuru et al, 2020).…”

“…In the same manner that Leguminosae was also found to be prominent among the ethnic groups in earlier studies in Madhya Pradesh and other areas of the globe (Abe and Ohtani, 2013;Ong & Kim, 2014;Kankara et al, 2015;Lal and Sahu, 2016;Gupta et al, 2018;Al-Fatimi, 2019;Najem et al 2019;Rao et al, 2022;Hussain et al 2022;Lal et al, 2023, which is in line with the results of our study. It is possible that this family is so dominant because of its tree-like life form, its widespread dispersion, and its abundance in the area under investigation (Rao et al, 2022;Thakur, 2015). Trees accounted for 35.40 % of the recorded plant species, while herbs made up 33.37 %, shrubs made up 15.17 percent, and climbers made up 5.60 %.…”

Species distribution patterns of the weed flora in mango orchards of Ismailia Governorate, Egypt:implications for conservation

“…The dominance of therophytes seems to be a response to the hot-dry climate, topographic variation and biotic influence (Heneidy and Bidak, 2001). On the contrary, the low number of perennials (20.59%) might be related to the anthropogenic activities including various cropping practices, ploughing, weeding, harrowing, collecting food and fodder species, which could affect vegetative growth structures, as well as the life cycles of the perennial weeds; this fact also reported by Abd El-Ghani and Abdel-Khalik (2006), Abd El-Ghani et al (2013 and Bhattacharjya and Sarma (2016).…”