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546,196 artículos
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Año:
2016
ISSN:
2215-2067, 1409-3871
Singer, Rodrigo B.
Universidad de Costa Rica
Resumen
Because of their remarkable flower morphology, orchids are particularly interesting objects of study. Most orchid species hold their pollen in discrete packs, so-called pollinia (singular; pollinium). These pollinia, together with other pollinium stalks, form more or less complex translatory units, so-called pol- linaria (singular: pollinarium).
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Año:
2016
ISSN:
2215-2067, 1409-3871
Powell, Martyn P.; Pupulin, Franco; Warner, Jorge; Chase, Mark W.; Savolainen, Vincent
Universidad de Costa Rica
Resumen
Extensive radiation in oncidioid orchids (subtribe Oncidiinae) has resulted in over 1,700 species in tropical America in some 70 genera. They exhibit a wide range of habitats, occurring terrestrially or, more commonly, epiphytically and can be found from sea level to the Andean paramós and from deserts to rainforests.
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Año:
2016
ISSN:
2215-2067, 1409-3871
Light, Marilyn H. S.
Universidad de Costa Rica
Resumen
The way to conservation is through education. People of all ages everywhere are learning how to make wise use of natural resources to ultimately ben- efit and sustain future generations but clear goals, objectives and analogies are needed to reinforce the message. Conservation education initiatives can be compared to production of a food crop. A crop plant must first be selected to suit the growing environment then the fields prepared for planting. After planting, the growing plants must be cared for. Only after a successful harvest can the profit be realized.
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Año:
2016
ISSN:
2215-2067, 1409-3871
Campos, Jorge Arturo
Universidad de Costa Rica
Resumen
En el año 1991 se creó esta reserva priva- da, con el fin de conservar 120 hectáreas ubicadas en San Lorenzo de San Ramón. El proyecto “Flórula de orquídeas de la Reserva Valle Escondido” se inició en el año 2000 con la idea de cuantificar, estudiar y pro- teger las especies de orquídeas de la reserva.
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Año:
2016
ISSN:
2215-2067, 1409-3871
Dodson, Calaway H.
Universidad de Costa Rica
Resumen
At the present time we have cataloged 3,784 species of orchid naturally occurring in Ecuador, the smallest country in Andean South America. When one considers the size of the country of Ecuador, in comparison with that of Brazil or Colombia, the total numbers seem to express an error on the part of the counter.
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Año:
2016
ISSN:
2215-2067, 1409-3871
González Ramírez, José; Poveda Álvarez, Luis
Universidad de Costa Rica
Resumen
A new species of Ficus L. (Moraceae) restricted to the Osa Peninsula of Costa Rica is described and illustrated in this paper: Ficus lasiosyce is distinguished by the paired and sessile syconia, densely cov- ered by woolly, light brown or light golden tricomes; two basal bracts that cover almost the entire sycone are usually divided into 3-4 lobes; and by its persistent stipules exceeding the length of the syconia. It is compared to Ficus brevibracteata Burger, from Nicaragua to Colombia and Ecuador, with inconspicuous basal bracts.
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Año:
2016
ISSN:
2215-2067, 1409-3871
González Ramírez, José; Poveda Álvarez, Luis
Universidad de Costa Rica
Resumen
Two new species of Croton L. (Euphorbiaceae) restricted to Costa Rica are described and illus- trated in this paper: Croton corinthius from the lowlands of the Caribbean slope and Croton megistocarpus from the midlands of both slopes of the main ridges. The first is distinguished for the presence of stalked glands near the vein axils of the leaves. The second is compared to C. pachypodus Webster, from Panama and Colombia.
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Año:
2016
ISSN:
2215-2067, 1409-3871
González Ramírez, José; Poveda Álvarez, Luis
Universidad de Costa Rica
Resumen
Krugiodendron acuminatum, the second species of a previously monospecific genus is described and illustrated, based on material from Costa Rica and Mexico. This new species is immediately distin- guished from K. ferreum (Vahl) Urb., by the difference in the apex of the leaf blade; the first (as is implicit in the epithet) has an acuminate apex, while that of second is consistently emarginate.
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Año:
2016
ISSN:
2215-2067, 1409-3871
Morales, J. Francisco; Alfaro, Evelio
Universidad de Costa Rica
Resumen
T i l l a n d s i a g u a t e m a l e n s i s , i s r e p o r t e d f o r f i r s t t i m e i n C o s t a R i c a . I t s r e l a t i o n s h i p s w i t h o t h e r species are discussed. In addition, a key for these species is given.
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Año:
2016
ISSN:
2215-2067, 1409-3871
Dressler, Robert L.; Pupulin, Franco
Universidad de Costa Rica
Resumen
A new species, Oncidium zelenkoanum, is described from western Panama. It appears to be an isolated species, without known close relatives in Central America. The column wings have subulate, distal lobules that resemble the “awns” or “cirrhi” of some species of Odontoglossum.
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