Yaupon

n. evergreen holly native of southeast United States with smooth oval leaves and red or yellow fruit; tea made from the dried leaves of the yaupon shrub

Ilex vomitoria (Yaupon Holly, Yaupon, or Cassina; the latter shared with Ilex cassine), is a species of holly native to southeastern North America, occurring in United States from Virginia south to Florida and west to Oklahoma (extreme southeast only) and Texas, and in Mexico in Chiapas.It is an evergreen shrub or small tree reaching 5-9 m tall, with smooth, light gray bark and slender, hairy shoots. The leaves are alternate, ovate to elliptical with a rounded apex and crenate or coarsely serrated margin, 1-4.5 cm long and 1-2 cm broad, glossy dark green above, slightly paler below. The flowers are 5–5.5 mm diameter, with a white four-lobed corolla. The fruit is a small round or red (occasionally yellow) drupe 4-6 mm diameter containing four seeds, which are dispersed by birds eating the fruit. The species may be distinguished from the similar Ilex cassine by its smaller leaves with a rounded, not acute apex.
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(n.)
A shrub (Ilex Cassine) of the Holly family, native from Virginia to Florida. The smooth elliptical leaves are used as a substitute for tea, and were formerly used in preparing the black drink of the Indians of North Carolina. Called also South-Sea tea.