David John Keil

Flaveria mcdougallii is a very rare North American plant species of Flaveria within the family Asteraceae. It has been found in 4 locations in the Grand Canyon in northwestern Arizona in the southwestern United States, in Mohave County and Coconino County. Many of the populations lie inside Grand Canyon National Park, others within the Hualapai Indian Reservation. Flaveria mcdougallii grows primarily near alkaline springs and springs along the Colorado River. It is a hairless subshrub up to 50 cm (20 in) tall. One plant can sometimes produce 200 or more small yellow flower heads in a

Pectis pimana is an herbaceous plant in the family Asteraceae. It is endemic to a mountainous area in the Sierra Madre Occidental, in the Mexican State of Chihuahua. Type locale is the village of Nabogame, 18 km northwest of Yepachic and about 10 km east of the state line with Sonora. Most of the inhabitants of Nabogame are of the indigenous ethnic group known as the Mountain Pima or Pima Bajo; the specific epithet "pimana" was chosen in their honor.

Pectis glaucescens, the sanddune cinchweed or tea blinkum, is a species of summer blooming annual plant in the family Asteraceae. It is native to Florida, Hispaniola, Jamaica and the Bahamas. Pectis glaucescens is a freely-branching annual weed with opposing leaves in narrow rows. Leaves contain rows of oil glands on the lower surface. It has long-stalked yellow flowers with two to five small-scale fruits.

Hooveria is a genus of perennial bulbous plants in the Agavaceae family native to California and northwest Baja California. They are among a number of taxa referred to as amole (having detergent properties). They are characterized by diurnal flowering and were formerly placed in the genus Chlorogalum, which consists of vespertine flowering species. They are named in honor of Robert F. Hoover, a field botanist from California who was responsible for founding the botanical garden and herbarium at California State Polytechnic College.

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Chrysactinia lehtoae is a Mexican species of flowering plants in the family Asteraceae. It is native to northwestern Mexico, found only in pine-oak forests in northern Sinaloa. Chrysactinia lehtoae is a small, branching, evergreen subshrub up to 30 cm (12 inches) tall. Leaves are pinnately lobed. Flower heads have yellow ray flowers and yellow-green disc flowers.

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Isocarpha fistulosa is a New World species of plants in the family Asteraceae. It has been found only in Peru and Ecuador. Isocarpha fistulosa is an annual herb up to 70 cm (28 in) tall. Leaves are up to 4 cm (1+1⁄2 in) long. One plant produces several flower heads, each head with 120–150 white disc flowers but no ray flowers.

Hooveria purpurea is a species of flowering plant related to the agaves known by the common name purple amole. This species of soap plant is endemic to California, where it grows in the Santa Lucia Range, in the Central Coast region. There are two varieties of this plant, and both are believed to be quite rare. It is a federally listed threatened species.

Hooveria parviflora is a species of perennial herb in the subfamily Agavoideae known by the common name smallflower soap plant. It is a monocot, native to coastal southern California and Baja California, where it is a member of the coastal sage scrub flora. It resembles a smaller version of Chlorogalum pomeridianum, with wavy leaves and white flowers that open during the day.

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