Adjibade, Y., Weniger, B., Quirion, J.C., Kuballa, B., Cabalion, P. and Anton, R. (1992) Dimeric alkaloids from Psychotria fosteriana
Agyili, J., Sacande, M., Koffi, E. and Peprah, T. (2007) Improving the collection and germination of West African Garcinia kola Heckel seeds. New Forests
Araújo, C.G. and Cardoso, V.J.M. (2007)
Psychotria hoffmansegiana (Willd ex Roem. & Schult.) Mull. Arg. and Palicourea marcagravii st. Hil. (Rubiaceae): potential for forming soil seed banks in a Brazilian Cerrado. Brazilian Journal of Biology
Bambaradeniya, C.N.B. and Ekanayake, S.P. (2003) A guide to the biodiversity of Knuckles Forest Region. Colombo, Sri Lanka, IUCN – the World Conservation Union, Sri Lanka Country Office.
Baskin, C.C. and Baskin, J.M. (2005) Seed dormancy in trees of climax tropical vegetation types. Tropical Ecology
Baskin, C.C. and Baskin, J.M. (2007) Nymphaeaceae: a basal angiosperm family (ANITA grade) with a fully developed embryo. Seed Science Research
Baskin, C.C. and Baskin, J.M. (2014) Seeds: ecology, biogeography and evolution of dormancy and germination (2nd edition). San Diego, California, Elsevier/Academic Press.
Baskin, J.M. and Baskin, C.C. (1985) Epicotyl dormancy in seeds of Cimicifuga racemosa and Hepatica acutiloba
. Bulletin of the Torrey Botanical Club
Baskin, J.M. and Baskin, C.C. (2004) A classification system for seed dormancy. Seed Science Research
Brown, R.F. (1987) Germination of Aristida armata under constant and alternating temperatures and its analysis with the cumulative Weibull distribution as a model. Australian Journal of Botany
Corrêa, L.R., Soares, G.L.G. and Fett-Neto, A.G. (2008) Allelopathic potential of Psychotria leiocarpa, a dominant understory species of subtropical forests. South African Journal of Botany
Da Silva, E.A., Toorop, P.E., Van Lammeren, A.A. and Hilhorst, H.W.M. (2008) ABA inhibits embryo cell expansion and early cell division events during coffee (Coffea arabica ‘Rubi’) seed germination. Annals of Botany
Davis, A.P., Bridson, D., Jarvis, C. and Govaerts, R. (2001a) The typification and characterization of the genus Psychotria L. (Rubiaceae). Botanical Journal of the Linnean Society
Davis, M.A., Pritchard, S.G., Boyd, R.S. and Prior, S.A. (2001b) Developmental and induced responses of nickel-based and organic defences of the nickel-hyperaccumulating shrub, Psychotria douarrei
. New Phytologist
De Farias, E.T., da Silva, E.A., Toorop, P.E., Bewley, J.D. and Hilhorst, H.W. (2014) Expression studies in the embryo and in the micropylar endosperm of germinating coffee (Coffea arabica cv. Rubi) seeds. Plant Growth Regulation
Dissanayake, M.D. (1987) A revised handbook to the flora of Ceylon. Vol. VI. pp. 328–364. New Delhi, India, Amerind Publishing.
Dussert, S., Chabrillange, N., Engelmann, F. and Hamon, S. (1999) Quantitative estimation of seed desiccation sensitivity using a quantal response model: application to nine species of the genus Coffea L. Seed Science Research
Ellis, R.H., Hong, T.D. and Roberts, E.H. (1990) An intermediate category of seed storage behaviour? I. Coffee. Journal of Experimental Botany
Engel, V.L. and Parrotta, J.A. (2001) An evaluation of direct seeding for reforestation of degraded lands in central São Paulo state, Brazil. Forest Ecology and Management
Farmer, R.E. (1977) Epicotyl dormancy in white and chestnut oaks. Forest Science
Flores, E.M., Poulsen, K. and Stubsgaard, F. (1996) Recalcitrant tree seed species of socioeconomic importance in Costa Rica: state of knowledge of physiology. Intermediate/recalcitrant tropical forest tree seeds. pp. 136–140 in Proceedings of the Workshop on Improved Methods for Handling and Storage of Intermediate/Recalcitrant Tropical Forest Tree Seeds, 8–10 June 1995, Humlebaek, Denmark.
Green, B.M.P. (Ed.) (2008) A guide to nature's diversity in Horton Plains National Park. Colombo, Sri Lanka, Department of Wildlife Conservation, Ministry of Environment and Natural Resources.
Gunatilleke, I.A.U.N. and Gunatilleke, C.V.S. (1990) Distribution of floristic richness and its conservation in Sri Lanka. Conservation Biology
Hamilton, C.W. (1989) A revision of Mesoamerican Psychotria Subgen. Psychotria (Rubiaceae). Part III: species 48–61. Annals of the Missouri Botanical Garden
Henriques, A.T., Lopes, S.O., Paranhos, J.T., Gregianini, T.S., Fett-Neto, A.G., Schripsema, J. and Von Pose, G.L. (2004) N, β-d-Glucopyrano-sylvincosamide, a light regulated indole alkaloid from the shoots of Psychotria leiocarpa
Hong, T.D. and Ellis, R.H. (1996) A protocol to determine seed storage behaviour. IPGRI Technical Bulletin No. 1. Rome, Italy, International Plant Genetic Resources Institute.
ISTA (International Seed Testing Association). (2008) International rules for seed testing (edition 2008). Bassersdorf, Switzerland, ISTA.
Jayasuriya, K.G., Wijetunga, A.S., Baskin, J.M. and Baskin, C.C. (2012) Physiological epicotyl dormancy and recalcitrant storage behaviour in seeds of two tropical Fabaceae (subfamily Caesalpinioideae) species. AoB PLANTS. doi: 10.1093/aobpla/pls044.
Judd, W.S. (1999) Plant systematics: A phylogenetic approach. Sunderland, Sinauer Associates.
Lopes, S., Von Poser, G.L., Kerber, V.A., Farias, F.M., Konrath, E.L., Moreno, P., Sobral, M.E., Zuanazzi, J.A.S. and Henriques, A.T. (2004) Taxonomic significance of alkaloids and iridoidglucosides in the tribe Psychotrieae (Rubiaceae). Biochemical Systematics and Ecology
Mabberley, D.J. (2008) Mabberley's plant-book: A portable dictionary of plants, their classifications, and uses. Cambridge, Cambridge University Press.
Martin, A.C. (1946) The comparative internal morphology of seeds. American Midland Naturalist
MOE (Ministry of the Environment). (2012) The National red list 2012 of Sri Lanka; Conservation status of the fauna and flora. Colombo, Sri Lanka, Ministry of the Environment.
Nepokroeff, M., Bremer, B. and Sytsma, K.J. (1999) Reorganization of the genus Psychotria and tribe Psychotrieae (Rubiaceae) inferred from ITS and rbcL sequence data. Systematic Botany
Ng, F.S. (1992) Manual of fruits, seeds and seedlings. Vol. 2. Kuala Lumpur, Malaysia, Forest Research Institute.
Nikolaeva, M.G. (1977) Factors controlling the seed dormancy pattern. pp. 51–74
Khan, A.A. (Ed.) Physiology and biochemistry of seed dormancy and germination. Amsterdam, North-Holland.
Olson, D.M. and Dinerstein, E. (1998) The Global 200: a representation approach to conserving the Earth's most biologically valuable ecoregions. Conservation Biology
Orwa, C., Mutua, A., Kindt, R., Jamnadass, R. and Simons, A. (2009) Agro-forest tree database: a tree reference and selection guide version 4.0. 2009. Available at http://www.worldagroforestry.org/af/treedb/ (accessed 3 June 2015).
Sohmer, S. (1988) The non-climbing species of the genus Psychotria (Rubiaceae) in New Guinea and the Bismarck Archipelago. Honolulu, Hawaii, Bishop Museum Press.
Vazquez-Yanes, C. and Orozco-Segovia, A. (1993) Patterns of seed longevity and germination in the tropical rainforest. Annual Review of Ecology and Systematics
Weerawardhena, S.R. and Russell, A.P. (2012) Cover-dependency of anurans in the Riverstone, Knuckles Mountain Forest Range, Sri Lanka. Taprobanica: The Journal of Asian Biodiversity