First two are Equisetum debile Roxb. ex Vaucher Mém. Soc. Phys. Genève 1: 387. 1822 (Pteridophyte: Equisetaceae) also called horsetail fern.
Second two are Asclepias curassavica L. Sp. Pl. 1: 215. 1753 Type: Lectotype : Herb. Linn. No. 310.19 (LINN) Third is: Zamia pumila L. Sp. Pl., ed. 2. 2: 1659. 1763 Type: Lectotype = "Palma Prunifera humilis non spinosa Insulae Hispaniolae, fructui jujubino similis, ossiculo triangulo" in Commelin, Hort. Med. Amstelod. Pl. Rar., 1: 111, t. 58, 1697 Regards Pankaj -- *********************************************** "TAXONOMISTS GETTING EXTINCT AND SPECIES DATA DEFICIENT !!" Pankaj Kumar Ph.D. (Orchidaceae) Research Associate Greater Kailash Sacred Landscape Project Department of Habitat Ecology Wildlife Institute of India Post Box # 18 Dehradun - 248001, India

