Karl Wilhelm Leopold Krug

Metopium toxiferum, the poisonwood, Florida poisontree, coral sumac, or hog gum, is a species of flowering tree in the cashew or sumac family, Anacardiaceae, that is native to the American Neotropics. It produces the irritant urushiol much like its close relatives poison sumac and poison oak. It is related to black poisonwood (Metopium brownei).

Brunfelsia densifolia is a species of flowering plant in the nightshade family known by the common name Serpentine Hill raintree. It is native to Puerto Rico. This plant is a shrub that grows on serpentine soils containing high amounts of magnesium, nickel, iron, and chromium, and some calcium and nitrogen. It produces long, tubular yellow flowers. It is cultivated as an ornamental plant, but in the wild it is endangered due to habitat loss as land is consumed for agriculture in Puerto Rico.

Eugenia rhombea, the red stopper, is a species of flowering plant in the family Myrtaceae. It is native to southern Florida, Mexico, Central America, the Caribbean, and northern Venezuela. A shrub or tree reaching 12 ft (3.7 m) with white flowers, it is typically found in rockland hammocks.

Ternstroemia luquillensis, the palo colorado, is a species of plant in the Pentaphylacaceae family. It is endemic to Puerto Rico. It is threatened by habitat loss and has been listed as an endangered species in the United States since 1992 under the Endangered Species Act

Styrax portoricensis, locally known as palo de jazmin, is a species of flowering plant in the family Styracaceae. It is endemic to Puerto Rico. It is one of the rarest endemic trees of Puerto Rico and is known to occur only in the northeastern Luquillo Mountains (Sierra de Luquillo) and the north-central Cayey Mountains (Sierra de Cayey).

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Brunfelsia portoricensis, the Puerto Rico raintree, is a species of flowering plant in the family Solanaceae. It is endemic to Puerto Rico, where it occurs in El Yunque National Forest. Due to its restricted range, it is classified by the IUCN as an endangered species.

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Mazaea is a genus of flowering plants in the family Rubiaceae. It is endemic to Cuba.

Eugenia sulcivenia is a species of flowering plant in the family Myrtaceae. It is a shrub or tree endemic to southeastern Jamaica. It is threatened by habitat loss.

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Marcgravia evenia is a species of flowering vine in the family Marcgraviaceae. Within this family it belongs to the Galetae group, which is characterized by a long inflorescence axis and boat shaped nectaries. The plant is endemic to Cuba. The inflorescence of M. evenia is extraordinary. At the upper end of the pendant inflorescence are several concave bracts set at an angle to reflect and focus sonar pulses from bats, helping the bats to locate the flowers. In the middle of the inflorescence is a discoid circle (or single-whorled umbel) of about twenty tubular tetramerous flowers. Below

Forestiera segregata is a species of flowering plant in the olive family known by the common names Florida privet, Florida swampprivet, and southern privet. It is native to the Bahamas, the Greater Antilles, including Puerto Rico and the Cayman Islands, the Lesser Antilles, including Anguilla, and Florida, Georgia, and South Carolina in the United States. This plant is a shrub or small tree growing up to three to seven meters tall. The gray or brownish twigs have lenticels. The leaves are widely lance-shaped, oval, or spatula-shaped with narrowed bases. They are up to 5 to 7 centimeters long.

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Erithalis quadrangularis is a species of plant in the family Rubiaceae. It is endemic to Jamaica.

Drypetes lateriflora, the Guiana plum, is a species of flowering plant in the family Putranjivaceae. It is native to Mexico, Central America, southern Florida, and the Caribbean. A tree reaching 30 ft (9 m), it is typically found in hammocks. It is assessed as Least Concern.

Ternstroemia granulata is a species of plant in the Pentaphylacaceae family. It is endemic to Jamaica.

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Mosquitoxylum is a monotypic genus of trees in the subfamily Anacardioideae of the family Anacardiaceae. It contains the single species Mosquitoxylum jamaicense, native to an area from southern Mexico to Ecuador and also to Jamaica.

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