| A Synopsis of the GenusSibara(Brassicaceae) | 2010/06/01 | English | 6 |
| Novelties in the Orchid Flora of Venezuela III —Epidendrum | 2010/06/01 | English | 6 |
| Synopsis of theTrichocentrum-Clade (Orchidaceae, Oncidiinae) | 2016/12/01 | English | 6 |
| A Synopsis of the GenusBraya(Brassicaceae) | 2014/12/01 | English | 6 |
| A Second Tree Species ofAmpelozizyphus(Rhamnaceae), from the Upper Cuyarí River Basin, Guianía (Colombia) | 2015/12/01 | English | 6 |
| Novelties in the Orchid Flora of Venezuela IV— Reinstatement ofOtostylis alba(Orchidaceae, Zygopetalinae)1 | 2012/12/01 | English | 6 |
| The Lauraceae Collected in Brazil by Ludwig Riedel — II.Ocotea | 2012/12/01 | English | 6 |
| Mosses of the Dominican Republic: Species Catalogue, Elevation Distribution and Floristic Affinities | 2010/12/01 | English | 6 |
| Englerocharis dentataandEudema peruviana(Brassicaceae), Two New Species from Peru | 2011/12/01 | English | 6 |
| New Combinations inEuplocaNutt . (Heliotropiaceae) from Mexico and Central America | 2017/12/01 | English | 5 |
| Ferula Shehbaziana(Apiaceae), A New Species from Kurdistan, Iraq | 2013/12/01 | English | 5 |
| Notes on the Brazilian Plants Collected by Georg Wilhelm Freyreiss and Published by Carl Peter Thunberg inPlantarum brasiliensium | 2014/06/01 | English | 5 |
| Onosma hawramanensis(Boraginaceae), a New Species from Kurdistan, Iraq | 2014/12/01 | English | 5 |
| With Great Biodiversity Comes Great Responsibility: The Underestimated Diversity of Epidendrum (Orchidaceae) | 2021/12/31 | | 5 |
| Capparidastrum tafallanum(Capparaceae), a New Species from the Northwestern Andean Slopes of Ecuador | 2014/12/01 | English | 5 |
| Novelties in the Orchid Flora of Venezuela VII. Cymbidieae, Catasetinae. Notes onGaleandra(Orchidaceae), Including a New Species1 | 2014/12/01 | English | 5 |
| Seven New Combinations in the GenusNeomarica(Trimezieae-Iridaceae) | 2009/12/01 | English | 5 |
| Nine New Species ofLicaria(Lauraceae) from Tropical America | 2009/12/01 | English | 5 |
| Notes on Asiatic Tropidia (Orchidaceae: Tropidieae). | 2018/06/01 | English | 5 |
| Notes on the Nomenclature of Neotropical Capparaceae: An Answer to Global flora | 2018/12/31 | | 5 |
| The Flora of the Tenancingo-Malinalco-Zumpahuacán Protected Natural Area, State of Mexico, Mexico | 2012/06/01 | English | 5 |
| Spiranthes Sunii Boufford & Wenheng Zhang,Sp. Nov.; A New Rheophytic Orchid from Gansu Province, China | 2008/12/01 | English | 5 |
| Additions to the Flora of the Strickland Basin, Papua New Guinea: Fittingia Paniculata (Myrsinaceae), A New Calciphilous Species from the Southern Limestone | 2008/12/01 | English | 4 |
| Notes on the Identity of Hedyotis Yangchunensis (Rubiaceae) in Hong Kong | 2008/12/01 | English | 4 |
| Taxonomic Notes on South American Miconia (Melastomataceae) | 2008/12/01 | English | 4 |
| Two New Peruvian Species ofDraba(Brassicaceae) | 2009/06/01 | English | 4 |
| Miscellaneous New Species in the Pleurothallidinae (Orchidaceae) | 2012/12/01 | English | 4 |
| Notes on Miscellaneous Species of the Tribe Thelypodieae (Brassicaceae) | 2012/06/01 | English | 4 |
| A New Species ofCaryodaphnopsis(Lauraceae) from Peru. | 2012/06/01 | English | 4 |
| Asa Gray and Charles Darwin: Corresponding Naturalists | 2010/12/01 | English | 4 |