A new species of Quararibea (Malvaceae) from Costa Rica = 코스타리카 아욱과 Quararibea속 신종 식물

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A new species of Quararibea (Malvaceae) from Costa Rica = 코스타리카 아욱과 Quararibea속 신종 식물
N A Zamora; A Cascante-Marin; Sangho ChoiSoo Yong Kim
Bibliographic Citation
Phytoneuron, vol. 67, pp. 1-6
Publication Year
Some previous collections of Quararibea nigrescens have been misidentified, confused or tentatively assigned to Quararibea costaricensis. Both species, however, can be consistently distinguished because Q. nigrescens has always twigs, leaves and calyx conspicuously silvery or grayish lepidote or stellate-peltate pubescent, while in Q. costaricensis twigs and leaves are sparsely diminute tomentulose with dark brown fasciculate or rufous-brown stellate or stellate-peltate pubescent, becoming essentially glabrate with age, except, the calyx which possesses a dense pubescence of granuliferous-lepidote golden or greenish-brown trichomes. The proposed species name, Q. nigrescens, refers to the peculiar, unique and consistent dark gray, blackish to almost black color of leaves (mainly) that is noticeable upon drying, while in Q. costaricensis dried leaves are always conspicuously yellowish-green or yellowish-brown. This character (leaves color upon drying of Q. nigrescens) is unique among all Costa Rican species of Quararibea; additional morphological differences between both species are included. RESUMEN Algunas colecciones previas de Quararibea nigrescens, han sido mal identificadas, confundidas o tentativamente asignadas a Quararibea costaricensis. Ambas especies se distinguen consistentemente porque Q. nigrescens siempre tiene ramitas, hojas y flores (caliz) con una pubescencia plateada o grisacea lepidota o estrellado-peltada conspicua, mientras en Q. costaricensis las ramitas y hojas tienen una pubescencia densa o esparcida diminuta con tricomas pardo-oscuro fasciculados o pardo-rojizo estrellado o estrellado-peltados, llegando a ser casi glabras con la edad, excepto, el caliz que esta cubierto densamente con tricomas dorados o pardo-verdoso granulado-lepidotos. El nombre propuesto, Q. nigrescens, obedece al color peculiar, unico y consistente, gris oscuro, negruzco o casi negro de las hojas (principalmente) despues del secado, mientras que en Q. costaricensis las hojas secas siempre se tornan conspicuamente verdoso-amarillentas o pardo-amarillentas despues de secas. Este caracter (color de las hojas de Q. nigrescens despues del secado) es unico entre todas las especies de Quararibea de Costa Rica; otras diferencias morfologicas entre ambas especies se mencionan.
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