Patricia D. Dávila

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Zeugites sylvaticus is a species of perennial bunchgrass. It is native to Colombia and Panama. It was first described as Calderonella sylvatica in 1973, the only species of the genus Calderonella.

Ibervillea macdougalii is a species of flowering plant of the Cucurbitaceae or gourd family. Also called the Tumamoc globeberry, it is native to the Sonoran Desert, and is found in Arizona, Baja California Norte, Sonora, and Zacatecas. Ibervillea macdougalii is a monoecious vine climbing over various shrubs. Stems die in the fall, but tuberous roots generally persist through the winter. Leaves are deeply 3-lobed, nearly cleft, each lobe similarly divided into several sections. Flowers are pale yellow with narrow corolla lobes. Pistillate (female) flowers are solitary in the leaf axils;

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Dioscorea juxtlahuacensis is a plant species endemic to a small area in the State of Oaxaca in southern Mexico. It is known only from the Santiago Juztlahuaca District in the Sierra Madre del Sur mountains, where it grows in deciduous oak-juniper forests at elevations of 1500–1700 m. Dioscorea juxtlahuacensis is a perennial vine spreading by means of underground rhizomes, trailing on the ground or twining onto other vegetation up to 60 cm above ground. Leaves are heart-shaped, up to 3 cm long and 4 cm wide. Staminate (male) inflorescences are up to 10 cm long, with 1-4 green flowers, formed

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