Taxonomic revision of the Pteronia adenocarpa group (Astereae, Asteraceae) Author Bello, Anifat O. 0000-0002-3031-5658 Department of Botany and Plant Biotechnology, University of Johannesburg, P. O. Box 524, Auckland Park 2006, Johannesburg, South Africa. & anifatolayemi @ gmail. com; https: // orcid. org / 0000 - 0002 - 3031 - 5658 anifatolayemi@gmail.com Author Boatwright, James S. 0000-0003-1250-4874 Department of Biodiversity and Conservation Biology, University of the Western Cape, Private Bag x 17, Bellville, 7535, South Africa. & jboatwright @ uwc. ac. za; https: // orcid. org / 0000 - 0003 - 1250 - 4874 jboatwright@uwc.ac.za Author Bank, Michelle Van Der 0000-0001-9462-3353 Department of Botany and Plant Biotechnology, University of Johannesburg, P. O. Box 524, Auckland Park 2006, Johannesburg, South Africa. & mvdbank @ uj. ac. za; https: // orcid. org / 0000 - 0001 - 9462 - 3353 mvdbank@uj.ac.za Author Magee, Anthony R. 0000-0002-7063-7299 Department of Botany and Plant Biotechnology, University of Johannesburg, P. O. Box 524, Auckland Park 2006, Johannesburg, South Africa. & Compton Herbarium, South African National Biodiversity Institute, Private Bag X 7, Claremont 7735, Cape Town, South Africa. & a. magee @ sanbi. org. za; https: // orcid. org / 0000 - 0002 - 7063 - 7299 a.magee@sanbi.org.za text Phytotaxa 2021 2021-10-15 523 1 73 88 journal article 4010 10.11646/phytotaxa.523.1.4 4cfde1f7-b505-4889-bef2-ff35e435efeb 1179-3163 5571985 Key to species of the Pteronia adenocarpa group 1. Cypselae glabrous-glossy, glandular and/or hairy, when hairy then hairs evenly distributed on the surface ...................................... ............................................................................................................................................................ remaining species of Pteronia - Cypselae hairy, hairs strictly confined to the base .............................................................................................................................2 2. Branches glabrous ..............................................................................................................................................................................3 - Branches hairy ....................................................................................................................................................................................5 3. Branches greyish-white; leaves slightly keeled; cypselae glabrous on the surface.......................................................... 6. P. viscosa - Branches greenish; leaves flattened; cypselae glandular on the surface ............................................................................................4 4. Leaves narrowly ovate, free, glabrous, apex with prominent cluster of bristles; capitula pedunculate; pappus biseriate, straight..... ................................................................................................................................................................................... 2. P. armatifolia - Leaves oblanceolate or obovate, connate at base, punctate, apex without prominent cluster of bristles; capitula sessile; pappus multiseriate with a tortuous band near the base........................................................................................................ 1. P. adenocarpa 5. Involucral bracts puberulent; cypselae glandular on the surface; corolla brown ................................................. 5. P. stoehelinoides - Involucral bracts and cypselar surface glabrous; corolla yellow........................................................................................................6 6. Branches setose; cypselae oblong ...................................................................................................................... 4. P. hutchinsoniana - Branches pubescent; cypselae ovate............................................................................................................................... 3. P. elongata