Smithsonian Digital Repository (Smithsonian Institution) · 1997 · 31 citations · 4 references
Life SciencesBotanyPlant SciencesPlant AnatomyPlant SystematicsPlant TaxonomyBotanical GardensFloral MorphologyPlant DescriptionTropical EcologyTropical Plant EcologyTaxonomic Literature ReviewTropical FlorasTropical Plant Diversity
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An Integrated System of Classification of Flowering Plants
Rudolf Schmid, Arthur Cronquist · Taxon · 1995 · 3.3K citations
On the Flora of the Guayana Highland
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Natural Sciences, Botany, Geology +15
Revision of Hillia (Rubiaceae)
Charlotte M. Taylor · Annals of the Missouri Botanical Garden · 1994 · 33 citations
New Species of Rubiaceae from French Guiana, Brazil, and Colombia
Julián A. Steyermark · Brittonia · 1981 · 10 citations