Monographs Details: Aiouea pernitida C.K.Allen
Authority: Maguire, Bassett. 1965. The Botany of the Guayana Highland. Mem. New York Bot. Gard. 12 (3): 1-285.
Description:Latin Diagnosis - Arbor ad 20 m alta, gemmis anguste ovoideis, acuminatis, ramulis glabris, juventute gracilibus pallide rubescentibus aliquantum angularibus, mox teretibus, striatis. Folia alternata, ramulorum apice saepe opposita congesta, petiolis gracilibus rubescentibus, canaliculatis, ad 10-12 mm longis, laminis utrmque glabris coriaceis supra flavo-viridescentibus pernitidis, subtus pallidioribus opacis, ellipticis ad basim attenuate aeutis, leviter decurrentibus, (6-) 8-10 cm longis et 2-3.5 cm latis, graciliter acuminatis vel obtuse aeutis, raro emarginatis, utrinque undulatis, penninerviis, costa supra rubescenti leviter elevata, subtus conspicue elevata, nervis 6-8-paribus supra aliquando rubescentibus plerumque leviter inconspicueque elevatis, subtus gracilibus plus minusve obscuris elevatis, angulo ad 34° divergentibus, supra leviter elevate subtus obscure. Inflorescentia axillaris subterminalisque gloriose multiflora, pallide rubescenti, satis tenuis, utrinque glabra, paniculata, ad 6-8 cm longa, pedunculo ad 3-5 cm longo. Flores parvi ad 3.5 m m longi, pedicellis filamentosis ad 1.5-4.5 mm longis, perianthio suburceolato-campanulato, aliquantum rigido (post anthesin), lobis ovatis ad apicem plus minusve papillosis, venis conspicuis, ad 1-1.6 mm longis, tubo ad 1-2 mm longo; staminibus fertilibus ser I ut videtur subpetalloideis ad 0.9-1.3 mm longis, antheris rectangularibus abrupte acuminatis, locellis basalibus, connective magno, filamentis brevibus plus minusve robustis quam antheris quartamvel tertiam partem brevioribus, ser II et III sterilibus, ser II plus minusve variabile subpetalloideis ad 1 mm longis, ser III filamentis aliquantum robustis quam antheris subrotundatis leviter longioribus biglandulosis, glandulis magnis ad 0.4-0.6 mm stipitatis; ser IV subcordato-ovatis acuminatis tenue brevique stipitatis, ad 0.8 mm longis; gynoecio ad 1.5-2 mm longo, ovario subrotundo, ad 0.9 mm diam., stylo crasso ad 0.8-10 mm longo, ad stigmata plus minusve lobata expanse. Infructescentia et fruetus ignoti.

Discussion:The species is striking because of the showy, densely flowered inflorescences borne in the axils of the very shining, undulate leaves which are thickly clustered at the tips of the terminal branchlets. There are species of which the above is superficially reminiscent, among them A. hcnlhamiana and A. guianensis, both of which bear larger leaves, less densely congested at the branchlet tips and more tenuous inflorescences with smaller, more dainty flowers quite different in structure. The floral structure of A. pernitida is similar to that of Aiouea myristicoides Mez belonging to the subgenus Trianthcra Mez, with but one staminal cycle fertile; it is similar in structure, as Kostermans (Meded. Bot. Mus. Utrecht 46: 103. 1938) suggests in connection with A . myristicoides, to A . piauhyensis (Meissner) IMez belonging to the subgenus Hufelandiopsis Mez, with the first three cycles of stamens fertile. The species of this group appear to be unstable for, although in general the floral structures are as outlined above, they are by no means consistently so. Petalloidy is variable in its manifestation, the stamens ranging from narrowly to broadly expanded or club-shaped at the tip.