Taxonomic studies in the genus Haplanthodes (Acanthaceae) Author Deshmukh, Pradip Vikram Author Surveswaran, Siddharthan 0000-0002-6824-981X Department of Life Sciences, CHRIST (Deemed to be University), Bengaluru, India. & siddharthan. s @ christuniversity. in; https: // orcid. org / 0000 - 0002 - 6824 - 981 X siddharthan.s@christuniversity.in Author Gore, Ramchandra Dnyanoba 0000-0001-7662-6446 Walchand College of Arts and Science, Solapur, Maharashtra, India. & ramdgore @ gmail. com; https: // orcid. org / 0000 - 0001 - 7662 - 6446 ramdgore@gmail.com Author Lekhak, Manoj Madhwanand 0000-0001-5753-2225 Angiosperm Taxonomy Laboratory, Dept. of Botany, Shivaji University, Kolhapur, Maharashtra, India. & mml _ botany @ unishivaji. ac. in; https: // orcid. org / 0000 - 0001 - 5753 - 2225 mml_botany@unishivaji.ac.in text Phytotaxa 2021 2021-08-26 516 3 201 222 http://dx.doi.org/10.11646/phytotaxa.516.3.1 journal article 10.11646/phytotaxa.516.3.1 1179-3163 5372865 Key to species of Haplanthodes 1. Cladodes stout, spiny..................................................................................................................................................... H . verticillata - Cladodes slender, not spiny ................................................................................................................................................................2 2. Feathery hairs present only on the lower half of the cladode; calyx 1/2 the length of corolla; cladodes up to 1.8 cm long ............... ........................................................................................................................................................................................... H . plumosa - Feathery hairs absent on the cladode; calyx 1/4 the length of corolla; cladodes up to 3 cm long .....................................................3 3. Ovary glabrous; bracts equal to length of calyx; cladodes 2–4 times longer than the length of corolla; seeds with micro-papillae .. ....................................................................................................................................................................................... H . tentaculata - Ovary hairy; bracts shorter than the length of calyx; cladodes equal or shorter than the length of corolla; seeds without micropapillae .................................................................................................................................................................. H. neilgherryensis