flower
Medial section of an androecium of Couratari stellata.
Androecial hood: Couratari-type based on C. stellata. The external flap is found only in Couratari. Note that the outside of the hood is echinate.
A Brazil nut tree and flower
A Brazil nut tree (Bertholletia excelsa) growing on the banks of the Rio Negro in the state of Amazonas, Brazil (left) and a Brazil nut flower (right). Photos by C. A. Gracie (left) and Scott A. Mori (right).
Flower of Gustavia gracillima Miers cultivated at RB
Couroupita guianensis. Flower showing zygomorphic androecium. Photo by S. A. Mori.
Flower of Couroupita guianensis showing zygomorphic androecium. Photo based on an unvouchered tree cultivated in Costa Rica.
Flowers and fruits of the cannon ball tree. Photo of tree in flower by A. Vasco-Gutierrez and in fruit by L. E. Gámez.
Tree of Couroupita guianensis with cauline inflorescences and a few infructescences based on a non-vouchered tree cultived at the botanical garden in Caracas, Venezuela. Tree of Couroupita guianensis with mostly fruits based an unvouchered photo by L. E. Gámez Alvarez in Venezuela.
Flower of Couroupita guianensis. Photo by S. A. Mori.
Flower spread open of Couroupita guianensis based on unvouchered tree at the Fairchild Tropical Botanical Garden, Coral Gables, Florida. Note inferior ovary, staminal ring, stigma in hole in middle of staminal ring, appendage-free ligule, and hood with staminodes.
Bract and brateoles of Couroupita guianensis. Photo by S. A. Mori.
In Couroupita guianensis, the bract is located at the base of the pedicel and the bracteoles are inserted just below the articulation of the pedicel/hypanthium continuum. Based on an unvouchered tree growing in the Fairchild Tropical Botanical Garden.
Inflorescencia of a Brazil nut tree (Bertholletia excelsa).
Part of the inflorescence of a Brazil nut tree (Bertholletia excelsa) based on Mori et al. 17503 from Amapá, Brazil. Note the calyx has two lobes, the style is geniculate, and the petals are tightly adpressed against the androecium. Each of the lobes of the two-lobed calyx is formed from the post genital fusion of three sepals. In early bud, the the calyx encloses all but an apical slit. See Tsou and Mori. 2007. Amer. J. Bot. 94(5).
Medial section of a flower of Cariniana ianeirensis.
A medial longitudinal section of a flower Cariniana ianeirensis based on T. Couvreur 271 from the Department of La Paz, Bolivia. Note the red color at the inside and base of the staminal tube.