Michael G. Simpson

Oreocarya roosiorum is a species of flowering plant in the family Boraginaceae known by the common name bristlecone cryptantha. It is endemic to Inyo County, California, where it is known from only a few occurrences in the northern Inyo Mountains. It is a small, mat-forming perennial herb just a few centimeters high which grows from a woody caudex rooted in rocky soils. The leaves are up to about a centimeter long, oval to spoon-shaped, and hairy to bristly. The inflorescence is a dense cluster of tiny white flowers with five-lobed white corollas with yellow appendages.

Johnstonella micromeres is a species of flowering plant in the family Boraginaceae known by the common name pygmyflower cryptantha. It is native to California and Baja California, where it grows in woodland and chaparral.

Eryngium pendletonense (sometimes spelled E. pendletonensis) is a rare species of flowering plant in the carrot family known by the common name Pendleton button-celery. It is endemic to northern San Diego County, California, where it is known from four occurrences along the coastline between Oceanside and the Orange County border, including land within Camp Pendleton. It grows on vernally moist coastal grassland and coastal sage scrub habitat with clay soils. It was first described as a species in 1999. This is a squat perennial herb with spreading stems up to 20 centimeters (7.9 in) long

Oreocarya crassipes is a rare species of flowering plant in the borage family known by the common name Terlingua Creek cat's-eye. It is endemic to Brewster County, Texas, where it is known from only ten populations totaling about 5000 plants. All of the occurrences are within a ten-kilometer radius. This is a federally listed endangered species.

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Dudleya crassifolia is a species of drought deciduous, corm-forming succulent plant known by common name as the thick-leaf dudleya. It is an incredibly rare and cryptic plant native to one small locale less than a hectare in area on the Colonet peninsula in Baja California. It is threatened by urban development, including a proposed seaport. It is characterized by white, spreading flowers with leaf bases that are persistent on the stem. Although it did not receive as much media attention as the neighboring Dudleya hendrixii, it has been noted that the plant has several similarities to cryptic

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Chenopodium littoreum is an uncommon species of flowering plant in the family Amaranthaceae. It is endemic to California, known only from sections of the coastline of central California, in San Luis Obispo and Santa Barbara Counties.

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