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O trabalho objetivou descrever e ilustrar aspectos morfológicos do fruto, semente e plântulas de janaguba (Himatanthus drasticus (Mart.) Plumel.). Nos ensaios realizados em laboratório e casa de vegetação do Departamento de Fitotecnia do Centro de Ciências Agrárias, da Universidade Federal do Ceará, em Fortaleza-CE, foram observados nos frutos os seguintes aspectos: tipo, deiscência, tamanho, coloração e consistência do epicarpo, mesocarpo, endocarpo e placenta. Na semente, verificou-se dimensão, coloração, textura e consistência do tegumento, forma e bordo, posição do hilo, micrópila e rafe, embrião, cotilédones, eixo hipocótilo-radícula e plúmula, enquanto na plântula observou-se protrusão da raiz primária e secundária, hipocótilo, epicótilo e plúmula. As observações foram realizadas com auxílio de lupa de mesa, microscópio estereoscópico e as medidas foram tomadas com paquímetro digital. O fruto é polispérmico, possui em média 42 sementes aladas e albuminosas, com germinação faneroepígea cotiledonar. The objectives of this study were to describe and illustrate the morphological aspects of janaguba (Himatanthus drasticus (Mart.) Plumel.) fruit, seed and seedlings. All the experiments were conducted at the Laboratory of Seed Analysis of the Federal University of Ceará. The following characteristics were studied in janaguba fruits: type, dehiscence, dimension, consistency and coloration of the epicarp, mesocarp, endocarp and placenta. In janaguba seeds the characteristics studied were dimension, colour, texture, consistency of the tegument, shape, edges, hilum, micropyle and rafe positions, embryo, cotyledons, hypocotyl-radicle axes, and plumule. The janaguba seedling root system, hypocotyls, epicotyls, and first leaves were evaluated. Ruler and pachimeter were used to take the measurements, as well as optical microscope and magnifying glass. The janaguba fruit is full of seeds (42 seeds in average), winged; seeds are the albumin type and present epigeous germination

Morfologia de frutos, sementes e de plântulas de janaguba (Himatanthus drasticus (Mart.) Plumel. - Apocynaceae)