Blanco, M.A., G. Carnevali, D. Bogarín & R. B. Singer 2008
Further disentangling of a taxonomic puzzle: Maxillaria ramosa, Ornithidium pendulum, and a new species, O. elianae (Orchidaceae)
HARVARD PAPERS IN BOTANY 13(1): 137–154.

Bogarín, D. & F. Pupulin 2010
Two new species of Mormolyca from Costa Rica and Panama
ORCHID DIGEST 74(1): 42-47.

Cribb, P. & F. Pupulin 2006
A new Phragmipedium (Orchidaceae: Cypripedioideae) from Ecuador
LANKESTERIANA 6(1): 1-4.

Dressler, R.L. 1994
A homely little Encyclia from Western Panama, Encyclia fortunae Dressler
ORQUÍDEA (MEXICO CITY) N.S. 7(4): 356-359.

Dressler, R.L. 1994
Proposal to conserve Scaphyglottis against Hexisea (Orchidaceae)
TAXON 43: 665-666.

Dressler, R.L. 1997
New species and combinations in Costa Rican orchids
NOVON 7: 120-126.

Dressler, R.L. 2003
Manual de Plantas de Costa Rica: Orchidaceae, Vol. III

Dressler, R.L. & D. Bogarín 2007
Two attractive new species of Sobralia from Panama

Dressler, R.L. & C.H. Dodson 1960
Classification and phylogeny in the Orchidaceae

Dressler, R.L. & F. Pupulin 2005
The carmine Trichopilias of Central America: few but badly confused

Dressler, R.L. & F. Pupulin 2005
Some problems in Trichopilia (Orchidaceae: Oncidiinae), with two new species of modest flower size

Dressler, R.L., F. Pupulin & J. Folsom 2006
Three new Mesoamerican taxa of Dichaea with caducous leaves

Garay, L.A & G. Romero-González 1998
Schedulae Orchidum

Gigot, G., J. van Alphen-Stahl, D. Bogarín, J. Warner, M.W. Chase & V. Savolainen 2007
Finding a suitable DNA barcode for Mesoamerican orchids

Hunt, F. 1972
Eriopsis biloba (Orchidaceae)

Jenny, R. 2010
Gongora herrenhusana - eine alte Art, endlich mit eigenem Namen
ORCHIDEEN (HAMBURG) 61(2) 84-88.

Lahaye, R., M. van der Bank, D. Bogarín, J. Warner, F. Pupulin,
G. Gigot, O. Maurin, S. Duthoit, T.G. Barraclough & V. Savolainen 2007
DNA barcoding the floras of biodiversity hotspots

Mújica Benítez, E., F. Pupulin & R. Pérez Márquez 2006
Encyclia rosariensis (Orchidaceae), a new species from Cuba

Pridgeon, A.M. & M.W. Chase 2001
A phylogenetic reclassification of Pleurothallidinae (Orchidaceae)

Pridgeon, A.M. & M.W. Chase 2002
Nomenclatural notes on Pleurothallidinae (Orchidaceae)

Pridgeon, A.M., R. Solano & M.W. Chase 2001
Phylogenetic relationships in Pleurothallidinae (Orchidaceae): combined evidence from nuclear and plastid DNA sequences

Pupulin, F. 1995
A revision of the genus Trichocentrum (Orchidaceae: Oncidiinae)
LINDLEYANA 10(3): 183-210.

Pupulin, F. 2001
Contributions to a reassessment of Costa Rican Zygopetalinae (Orchidaceae). The genus Kefersteinia Rchb.f.
ANNALEN DES NATURHISTORISCHEN MUSEUMS WIEN B103: 525-555.

Pupulin, F. 2002
Catálogo revisado y anotado de las Orchidaceae de Costa Rica
LANKESTERIANA 2(2): 1—88.

Pupulin, F. 2005
Dichaea viridula (Orchidaceae: Zygopetalinae), a new species in the D. tenuifolia complex
HARVARD PAPERS IN BOTANY 10(1):83-87.

Pupulin, F. 2005
Trichocentrum dianthum (Orchidaceae)
CURTIS'S BOTANICAL MAGAZINE 22(1):56-62.

Pupulin, F. 2006
Genera Zygopetalinarum. Part 2. The genus Cochleanthes
ORCHID REVIEW 114:: 202-210.

Pupulin, F. 2007
Contributions toward a reassessment of Costa Rican Zygopetalinae (Orchidaceae). 3. A systematic revision of Dichaea in Costa Rica
HARVARD PAPERS IN BOTANY 12(1): 15-153.

Pupulin, F. 2009
Typi Swartziani Orchidacearum Indiae Occidentalis in Herbario Vindobonense conservandi
ANNALEN DES NATURHISTORISCHEN MUSEUMS WIEN B110:213-247.

Pupulin, F. & D. Bogarín 2005
The genus Brassia in Costa Rica: a survey of four species and a new species
LINDLEYANA (IN ORCHIDS, MAG. AMER. ORCH. SOC.) 74(3): 202-207.

Pupulin, F. & D. Bogarín 2007
A second species of Restrepiella (Orchidaceae: Pleurothallidinae)
WILLDENOWIA 37: 323-329.

Pupulin, F., D. Bogarín & D. Jiménez 2009
New species and records in Mesoamerican Lepanthes
ORCHID DIGEST 73: 136-145

Pupulin, F. & A. Karremans 2007
Prosthechea ionophlebia and P. chacaoensis: two different species, but which is which?

Pupulin, F. & A. Karremans 2007
The strange story of Hoffmann’s two Epidendrums

Pupulin, F. & H. Medina 2009
A second species of Seegeriella (Orchidaceae: Oncidiinae)
SELBYANA 30(1): 72-75.

Pupulin, F. & G. Merino 2008
Two new species of Kefersteinia (Orchidaceae: Zygopetalinae)
WILLDENOWIA 38: 1-7.

Pupulin, F. & G. Merino 2010
Comparettia sotoana (Orchidaceae: Oncidiinae), a new Ecuadorian species
LANKESTERIANA 9(3): 399-402.

Pupulin, F. & D.E. Mora-Retana 1994
A revision of the Costa Rican species of Trichocentrum (Orchidaceae)
SELBYANA 15(2): 87—103.

Pupulin, F., G. Rojas & J.D. Zúñiga 2007
Three new species of Acianthera (Orchidaceae: Pleurothallidinae) from Costa Rica
HARVARD PAPERS IN BOTANY 12(1):155—162.

Pupulin, F. & J. Warner 2005
Know your orchids. A botanical garden rich in information serving a country rich in flora
ORCHID CONSERVATION NEWS 6: 5—9.

Reichenbach, H.G. 1865
Flora (1865)

Schweinfurth, C. 1945
A remarkable orchid from the Andean region
AMERICAN ORCHID SOCIETY BULLETIN 13: 388—389.

Schweinfurth, C. 1945
A new Trichopilia from Peru
AMERICAN ORCHID SOCIETY BULLETIN 13: 424-426.

Senghas, K. & M. Thiv 1998
Il genere Neokoehleria: tre nuove specie provenienti da collezioni amatoriali

Trusty, J. & M.A. Blanco 2005
Las orquídeas de la Isla del Coco

Whitten, W.M., N.H. Williams, R.L. Dressler, G. Gerlach & F. Pupulin 2005
Generic relationships of Zygopetalinae (Orchidaceae: Cymbidieae): combined molecular evidence
LANKESTERIANA 5(2): 87—108.