| Lamiaceae (Clerodendrum & Rotheca). In G. Germishuizen & N.L. Meyer (eds), Plants of southern Africa: an annotated checklist. E RETIEF, PPJ HERMAN Strelitzia 14, 584–600, 2003 | 761* | 2003 |
| Asteraceae. In: DA Snijman (ed), Plants of the Greater Cape Floristic Region 2: The extra Cape Flora PPJ HERMAN, JC MANNING, RJ McKENZIE, L MUCINA, DA SNIJMAN, ... Strelitzia 30, 264–333, 2013 | 529* | 2013 |
| Asteraceae. In J.S. Golding (ed.), Southern African Plant Red Data Lists. PPJ HERMAN, WG WELMAN, JE VICTOR SABONET Report 14, 98–100, 109–111, 118–119, 2002 | 172* | 2002 |
| Plants of the northern provinces of South Africa: keys and diagnostic characters. E Retief, PPJ Herman | 105 | 1997 |
| Linaceae–Asclepiadaceae. In G.E. Gibbs Russell et al., List of species of southern African plants. E RETIEF, PPJ HERMAN Memoirs of the Botanical Survey of South Africa 48, 82–108, 1984 | 63* | 1984 |
| Asteraceae. In G.F. Smith, E.J. van Jaarsveld, T.H. Arnold, F.E. Steffens, R.D. Dixon & J.A. Retief (eds.), List of southern African succulent plants PPJ HERMAN, E RETIEF, WG WELMAN Umdaus Press, Pretoria., 1997 | 60* | 1997 |
| Ipomoea cairica (Convolvulaceae). WG WELMAN, PPJ HERMAN, G CONDY Flowering Plants of Africa 65, 138–144, 2017 | 50* | 2017 |
| Asteraceae. In G. Germishuizen & N.L. Meyer (eds), Plants of southern Africa: an annotated checklist. PPJ HERMAN, WG WELMAN, E RETIEF, M KOEKEMOER, N NETNOU Strelitzia 14, 178–310, 2003 | 42* | 2003 |
| ASTERACEAE KEY TO THE SPECIES OF THE GENUS HERTIA IN SOUTHERN AFRICA PPJ Herman Bothalia 28 (2), 192, 1998 | 39* | 1998 |
| Revision of the Tarchonanthus camphoratus complex (Asteraceae-Tarchonantheae) in southern Africa PPJ Herman Bothalia 32 (1), 21-28, 2002 | 25 | 2002 |
| Asteraceae (Compositae) PPJ Herman, E Retief, M Koekemoer, WG Welman Seed plants of southern Africa 10, 107-170, 2000 | 23 | 2000 |
| Eriocephalus and Lasiospermum. MAN Müller, PPJ Herman, HH Kolberg Flora of Southern Africa 33 (Asteraceae, Part 4: Anthemideae, Fascicle 1), 1–75, 2001 | 21* | 2001 |
| Synopsis of the genus Rennera Merxm. (Asteraceae, Anthemideae) with the description of a new species from South Africa PPJ Herman Botanical journal of the Linnean Society 129 (4), 367-377, 1999 | 11 | 1999 |
| Southern African succulent plants-an updated synopsis. GF Smith, SR Hobson, NL Meyer, P Chesselet, RH Archer, PM Burgoyne, ... | 11 | 1993 |
| New taxa, new records and name changes for southern African plants. BC de Wet, R Archer, L Fish, G Germishuizen, PP Herman, M Jordaan, ... Bothalia 21 (2), 191–213, 1991 | 11 | 1991 |
| Die familie Asteraceae:’n Algemene oorsig PPJ Herman Die Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie 19 (2), 66-67, 2000 | 9 | 2000 |
| Phenetic classification of cypselae in Ursinia (Anthemideae, Asteraceae) N Swelankomo, L Mucina, PPJ Herman South African Journal of Botany 73 (2), 316-316, 2007 | 8 | 2007 |
| The leaf anatomy of two Clerodendrum species (Verbenaceae) PPJ Herman South African journal of botany 64 (4), 246-249, 1998 | 8 | 1998 |
| Leaf anatomy of some southern African Pavetta species PPJ Herman, PJ Robbertse, N Grobbelaar South African Journal of Botany 52 (6), 489-500, 1986 | 8 | 1986 |
| A numerical analysis of the morphology of the leaves of some southern African Pavetta species PPJ Herman, PJ Robbertse, N Grobbelaar South African Journal of Botany 53 (1), 53-60, 1987 | 7 | 1987 |
Robert McKenzieUniversity of the Free State, Phuthaditjhaba, South AfricaVerified email at ufs.ac.za
