Lawrence Ray Heckard

Campanula shetleri is a rare species of bellflower known by the common name Castle Crags bellflower. The plant is named for Castle Crags, a mountain formation in its limited native range, within the Shasta-Trinity National Forest. It is endemic to California, where it is known from fewer than ten occurrences in the southern reaches of the Cascade Range near the border between Siskiyou and Shasta Counties.

Castilleja campestris is a species of Indian paintbrush known by the common name vernal pool Indian paintbrush. It is native to California and southern Oregon, where it grows in seasonally moist habitat, especially vernal pools.

Castilleja brevistyla is a species of Castilleja (Indian paintbrush) known by the common name shortstyle Indian paintbrush. It is endemic to California, where it grows on the grassy mountain slopes surrounding the San Joaquin Valley.

Castilleja attenuata is a species of Indian paintbrush, known by the common names valley tassels , attenuate Indian paintbrush, and narrowleaf Owl's-clover. It is native to western North America from British Columbia, through California, to Baja California, where it grows in grasslands and open woodland habitats.

Triphysaria pusilla is a species of flowering plant in the family Orobanchaceae known by the common name dwarf owl's-clover. The plant is native to the west coast of North America from British Columbia to central California from the California Coast Ranges across to the Sierra Nevada. It grows in moist open habitat such as spring-fed grasslands.

Triphysaria floribunda is a rare species of flowering plant in the family Orobanchaceae known by the common name San Francisco owl's-clover. It is endemic to California, where it is known only from the San Francisco Bay Area. It is limited to coastal regions of Marin, San Francisco, and San Mateo Counties, where it occurs in coastal prairie habitats, sometimes on serpentine soils.

Triphysaria eriantha is a species of flowering plant in the family Orobanchaceae, known by the common names johnny-tuck and butter-and-eggs. It is native to California and southwestern Oregon, where it grows in many types of habitats including chaparral, becoming quite common in some areas.

Orobanche vallicola is a species of broomrape known by the common name hillside broomrape or valley broom rape. It is endemic to California and grows in forest openings and woodlands.

Orobanche parishii is a species of broomrape known by the common names Parish's broomrape and short-lobed broomrape. It is native to the coast and mountains of California and Baja California, where it is a parasite growing attached to the roots of other plants, usually shrubs of the Asteraceae, such as Menzies' goldenbush (Isocoma menziesii). This plant produces usually one thick, hairy, glandular, pale yellowish stem up to about 26 centimetres (10 in) tall. As a parasite taking its nutrients from a host plant, it lacks leaves and chlorophyll. The inflorescence is a dense cluster of flowers

Castilleja tenuis is a species of Indian paintbrush, known by the common name hairy Indian paintbrush. It is native to the Northwestern United States, California, Nevada, and British Columbia. It grows from 1,000–2,800 metres (3,300–9,200 ft) in a number of habitat types including meadows, especially in mountainous areas including the Sierra Nevada and Cascade Range.

Castilleja rubicundula is a species of Indian paintbrush known by the common name cream sacs. It is native to northern California and southwestern Oregon. It is found in coastal and inland grasslands.

Castilleja lineariloba is a species of Indian paintbrush known by the common name thin-lobed owl’s clover that is endemic to the grasslands of the Sierra Nevada foothills in California.

Castilleja lacera is a species of Indian paintbrush known by the common name cutleaf Indian paintbrush. It is native to California and southern Oregon, where it grows in grassy mountain and foothill habitat. This is an annual herb coated in glandular hairs and growing up to about 40 centimeters tall. It has linear and lance-shaped leaves up to 5 centimeters long. The inflorescence is made up of hairy green bracts and bright yellow pouched flowers.

Castilleja exserta (formerly Orthocarpus purpurascens) is a species of plant in the genus Castilleja which includes the Indian paintbrushes. Its common names include purple owl's clover, escobita, and exserted Indian paintbrush. This species is native to the Southwestern United States in various habitats of California, Arizona, and New Mexico; and to Northwestern Mexico. It is an introduced species in Hawaii.

Castilleja densiflora is a herbaceous flowering plant species known by the common names denseflower Indian paintbrush or white / denseflower owlclover. Like other members of the Indian paintbrushes, it is a root-parasite. It is native to California and northern Baja California, where it grows in grassland and chaparral habitat. It is a variable species. It is generally 10 to 40 centimeters tall with linear or lance-shaped leaves up to 8 centimeters long, and with or without lobes. The inflorescence is as small as 3 centimeters or as long as 25 centimeters in length, and has bracts tipped in

Phacelia cookei is a rare species of phacelia known by the common name Cooke's phacelia. It is endemic to Siskiyou County, California, where it is known from just a few occurrences in the forest and scrub around Mount Shasta. The substrate in the area is sandy, ashy volcanic soil. It is an annual herb growing in a small, flat mat or with a short upright stem a few centimeters high. It is blue-green in color, succulent, and lightly hairy. The oval, smooth-edged leaves are one or two centimeters long and borne on short petioles. The hairy inflorescence is a one-sided curving or coiling cyme of

Triphysaria micrantha is a species of flowering plant in the family Orobanchaceae known by the common name purplebeak owl's-clover. It is endemic to California, where it is known from the grasslands of the Central Valley and the foothills to the east and west. It an annual herb producing a hairy, glandular, purple-colored stem up to about 15 centimeters in maximum height. Like many species in its family it is a facultative root parasite on other plants, attaching to their roots via haustoria to tap nutrients. Its greenish to red-purple leaves are up to 2.5 centimeters long and are sometimes

Castilleja praeterita is a species of Indian paintbrush known by the common name Salmon Creek Indian paintbrush. It is endemic to the High Sierra Nevada of California, where it grows in dry sagebrush meadows.

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Castilleja lasiorhyncha is a species of Indian paintbrush is endemic to southern California known by the common name San Bernardino Mountains Indian paintbrush. Most of the plant's range is in the San Bernardino Mountains, where it grows in forests and meadows. Castilleja lasiorhyncha only existing populations are in San Bernardino County and possibly San Diego County, with historical occurrences also known from Riverside County.

Phacelia stebbinsii is an uncommon species of phacelia known by the common name Stebbins' phacelia.

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