Question: What plant genus, Kigelia or Rumohra, occurs throughout tropical Africa?

Context paragraphs:
Monodora: Monodora is a genus of plant in family Annonaceae.  It contains approximately 35 species, distributed throughout tropical Africa.

Oeceoclades ugandae: Oeceoclades ugandae is a terrestrial orchid species in the genus "Oeceoclades" that is native to parts of tropical Africa, including west tropical Africa (Ghana and Ivory Coast), west-central tropical Africa (Gulf of Guinea islands and the Democratic Republic of the Congo), northeast tropical Africa (Ethiopia), and east tropical Africa (Kenya and Uganda).  It was first described by the British botanist Robert Allen Rolfe in 1913 as "Eulophia ugandae" and later transferred to the genus "Oeceoclades" in 1976 when Leslie Andrew Garay and Peter Taylor resurrected and revised that genus.  The English botanist V.S. Summerhayes treated this species as a synonym of "O. latifolia", but Garay and Taylor noted that while the two species share a superficial resemblance in the appearance of the labellum, they are distinct in vegetative morphology.  The labellum of "O. ugandae" also has two swellings or protuberances between the lateral and midlobes, a feature that "O. latifolia" lacks.

Gladiolus dalenii: Gladiolus dalenii is one of the most widely distributed species of gladiolus, ranging from eastern South Africa and Madagascar throughout tropical Africa and into western Arabia.  It is the main parental species of the large flowering grandiflora hybrids.  This species is also unusual in its genus in including diploid, tetraploid and hexaploid races.  The hybrids produced from it are often tetraploids.

Alchornea cordifolia: Alchornea cordifolia is a shrub or small tree distributed throughout tropical Africa.  The plant is used in traditional African medicine.

Chrysobalanus icaco: Chrysobalanus icaco, the cocoplum, Paradise Plum, abajeru and icaco, is found near sea beaches and inland throughout tropical Africa, tropical Americas and the Caribbean, and in southern Florida and the Bahamas.  It is also found as an exotic species on other tropical islands, where it has become a problematic invasive.  Although taxonomists disagree on whether "Chrysobalanus icaco" has multiple subspecies or varieties, it is recognized as having two ecotypes, described as an inland, much less salt-tolerant, and more upright "C. icaco" var.  "pellocarpus" and a coastal "C. icaco" var.  "icaco".  Both the ripe fruit of "C. icaco", and the seed inside the ridged shell it contains, are considered edible.

Rumohra: Rumohra is a genus of ferns in the family Dryopteridaceae.

Kigelia: Kigelia is a genus of flowering plants in the family Bignoniaceae.  The genus comprises only one species, Kigelia africana, which occurs throughout tropical Africa from Eritrea and Chad south to northern South Africa, and west to Senegal and Namibia.  The Kigelia grows a fruit that grows up to 2 feet long, weighs about 15 lbs, and looks like sausage.

Gnetum africanum: Gnetum africanum ("eru" or "African Jointfir") is a vine gymnosperm species found natively throughout tropical Africa.  Though bearing leaves, the genus "Gnetum" are gymnosperms, related to pine and other conifers.

Dracaena fragrans: Dracaena fragrans (cornstalk dracaena) is a flowering plant species that is native throughout tropical Africa, from Sudan south to Mozambique, west to Côte d'Ivoire and southwest to Angola, growing in upland regions at 600 – altitude.

Oeceoclades saundersiana: Oeceoclades saundersiana is a terrestrial orchid species in the genus "Oeceoclades" that is native to a large area in tropical Africa.  It can be found in west tropical Africa (Benin, Ghana, Guinea, Ivory Coast, Liberia, Nigeria, and Sierra Leone), west-central tropical Africa (Central African Republic, Cameroon, Equatorial Guinea, Gabon, the Gulf of Guinea islands, Rwanda, and Democratic Republic of the Congo), northeast tropical Africa (Ethiopia), east tropical Africa (Kenya, Tanzania, and Uganda), and south tropical Africa (Angola and Zambia).  It was first described by the German botanist Heinrich Gustav Reichenbach in 1866 as "Eulophia saundersiana".  It was later transferred to the genus "Oeceoclades" in 1976 by Leslie Andrew Garay and Peter Taylor.  Garay and Taylor noted that "O. saundersiana" has a labellum with four lobes of equal size and the pseudobulb is long and cylindrical with two leaves.

Supporting paragraphs: Kigelia Rumohra
Answer: Kigelia