Philipp Vincent Wells

Arctostaphylos catalinae, known by the common name Santa Catalina Island manzanita, is a species of manzanita native to Southern California. The evergreen shrub is found growing naturally only on Catalina and Santa Cruz Islands on the coast ridges. It thrives in maritime chaparral and can be used in coastal gardens.

Eriodictyon altissimum is a rare species of flowering plant in the borage family known by the common name Indian Knob mountainbalm. It is endemic to San Luis Obispo County, California, where it is known from only about six occurrences in the Irish Hills on the coast and nearby Indian Knob.

Arctostaphylos purissima is a rare species of manzanita known by the common name La Purisima manzanita.

Arctostaphylos osoensis is a species of manzanita known by the common name Oso manzanita. It is endemic to San Luis Obispo County, California, where it is known from only two occurrences on the northern edge of the Los Osos Valley. It grows exclusively on volcanic dacite from the Morro Rock-Islay Hill Complex associated with the Nine Sisters.

Arctostaphylos malloryi is a species of manzanita known by the common name Mallory's manzanita. It is endemic to California. The plant is native to the Inner North Coast Ranges west and northwest of the Sacramento Valley. It is a resident of the chaparral plant community, often on volcanic soils.

Arctostaphylos luciana is a species of manzanita known by the common name Santa Lucia manzanita, is endemic to California.

Arctostaphylos hooveri, the Santa Lucia manzanita, is a plant species endemic to the Santa Lucia Mountains in Monterey County, California. It grows in woodlands and in chaparral scrub-land at elevations of 900–1200 m. Arctostaphylos hooveri is a shrub or tree up to 8 meters tall, but typically ranges between 1 and 6 meters tall and 1 and 3 meters wide. Leaves are egg-shaped, whitish with wax, up to 6 cm long. Flowers are white, conical to urn-shaped, in branched panicles, and have red stems. Fruits are spherical or nearly so, about 8 mm in diameter.

Arctostaphylos peninsularis is a species of Arctostaphylos found in the Mexican state of Baja California.

Arctostaphylos nortensis, common name Del Norte manzanita, is a shrub narrowly endemic to the mountains along the Oregon/California state line. It has been reported from only 3 counties: Del Norte County, California; and Curry and Josephine Counties in Oregon. The plant grows in chaparral and open forests at elevations of 400–600 m (1,300–2,000 ft), occasionally on serpentine.

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Arctostaphylos bolensis is a species of perennial shrub in the heather family commonly known as the Cerro Bola manzanita. This species of manzanita is characterized by an erect habit, pendent panicles and the lack of a burl. It is a prolific bloomer, and when in blossom, it is enshrouded in white to pink urn-shaped flowers. This species is endemic to the Cerro Bola, and possibly the Cerro Italia, two mountain ranges southwest of the Valle de Las Palmas in northern Baja California.

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Arctostaphylos manzanita subsp. elegans, also known as the Konocti manzanita, is a subspecies of the Common manzanita. It is endemic to California. It was originally described at the rank of species as Arctostaphylos elegans in 1893 by Willis Linn Jepson. It was reduced to a subspecies of Arctostaphylos manzanita by Philipp Vincent Wells in 1968.

Arctostaphylos glandulosa subsp. crassifolia is a rare perennial shrub, a subspecies of manzanita within the heather family commonly known as the Del Mar manzanita. It is narrowly endemic to the sandstone coastal terraces of San Diego County and northwestern Baja California. It is a burl-forming evergreen shrub typically found growing in a rambling habit on poor soils and hardpan. From December to February, white to pink urn-shaped flowers decorate its foliage, giving way to small fruits. It is listed as endangered and is threatened by land development, invasive species and modifications to

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