Alfred Thomas Richardson

Tiquilia plicata, the fanleaf crinklemat or fan-leaved tiquilia, is a perennial, subshrub-like plant of lower elevation deserts in the family Ehretiaceae. It is found in the southwestern United States and northwestern Mexico, in the states of California, Nevada, Arizona, Sonora, and Baja California. It is a short, low-growing plant, seldom over 12 in tall. It has purple, lavender to bluish 5-lobed flowers; also small ovate leaves, crinkly with ridges, up to 1/2 in.

Tiquilia nuttallii (Nuttall's crinklemat, annual tiquilia, Nuttall sandmat, Nuttall's coldenia) is an annual, subshrub-like plant of middle and higher elevation deserts in the family Ehretiaceae. It is found in western North America from central Washington to western Colorado, and northern California and northern Arizona; it is also found in a disjunct population in Missouri. It is a short, low-growing plant, seldom over 4 to 12 inches tall. Flowers are five- lobed. Leaves are small with ridges, hence the name crinklemat.

Tiquilia nesiotica, known as gray matplant, is a species of plant in the family Ehretiaceae. It is endemic to the Galápagos Islands.

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Tiquilia canescens, the woody crinklemat or shrubby tiquilia, is a perennial, shrub in mid- to lower-elevation desert regions in the family Ehretiaceae. It is found in the southwestern United States and Northwestern Mexico, in the states of California, Nevada, Arizona, Utah, New Mexico, Texas, Chihuahua, Sonora, and Baja California. It is a short, low-growing plant, seldom over 15 in tall. It has pinkish to white, 5-lobed tubular flowers; leaves are ovate, gray green, and fleshy, to 1/2 - 3/4 in long.

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Tiquilia darwinii is a species of plant in the family Ehretiaceae. It is endemic to the Galápagos Islands of Ecuador.

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Tiquilia palmeri is a species of flowering plant in the borage family known by the common names Palmer's crinklemat and Palmer's tiquilia. It is native to the southwestern United States and northern Mexico, where it grows in sandy desert areas.

Tiquilia galapagoa is a species of plant in the family Ehretiaceae. It is endemic to the Galápagos Islands.

Tiquilia fusca is a species of flowering plant in the family Ehretiaceae. It is endemic to the Galápagos Islands.

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