John Robert Johnston

Inga macrantha is a species of plant in the family Fabaceae. It is found only in Venezuela.

Rinorea marginata is a species of plant in the Violaceae family. It is endemic to Colombia.

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Flaveria floridana, the Florida yellowtops, is a North American plant species of Flaveria within the family Asteraceae. It has been found only along the Gulf Coast of Florida between Clearwater and Marco Island, mostly in the Tampa Bay region. Flaveria floridana is a perennial herb up to 120 cm (3.9 ft) tall. Leaves are long and narrow, up to 14 cm (5.5 in) long. One plant can sometimes produce as many as 100 flower heads in a tightly packed array. Each head contains 9-14 yellow disc flowers. Sometimes it produces a single yellow ray flower as well.

Flaveria campestris, common name alkali yellowtops, is a plant species native to the southwestern United States and to the southern Great Plains (Arizona, Utah, New Mexico, Colorado, Texas, Missouri, Kansas, Oklahoma). It is found on saline soils and on the margins of lakes, ponds and streams. Flaveria campestris is an annal herb up to 90 cm (3 feet) tall. It produces a tightly packed corymb of up to 100 small flower heads. Flowers are yellow, sometimes lacking ray flowers, other times with only a single ray flower per head. Each head has 5-8 disc flowers.

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Flaveria palmeri is a rare Mexican plant species of Flaveria within the family Asteraceae. It has been found only in the States of Coahuila and Nuevo León in northeastern Mexico. Flaveria palmeri grows in dry gypsum soils in the Chihuahuan Desert. It is a shrub up to 75 cm (30 in) tall. Leaves are long and narrow, up to 8 cm (3 in) long. One plant can produce numerous small yellow flower heads in loose, branching arrays. Each head contains 3-8 disc flowers plus a few ray flowers.

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Muellera lutea is a species of flowering plant in the pea family (Fabaceae). It is a tree native to Isla de Margarita in the Venezuelan Antilles and the Araya Peninsula of northwestern Venezuela. It grows in tropical dry scrub and forest from 50 to 400 meters elevation.

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