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List of works by Lawrence Ray Heckard

A NEW CAMPANULA FROM NORTHERN CALIFORNIA

scientific article published in 1969

A NEW SPECIES OF CASTILLEJA FROM THE SOUTHERN SIERRA NEVADA

scientific article published in 1969

A New Lewisia (Portulacaceae) from the Sierra Nevada of California

scientific article

A TAXONOMIC RE-INTERPRETATION OF THE OROBANCHE CALIFORNICA COMPLEX

scientific article published in 1973

A Taxonomic Revision of Orthocarpus (Scrophulariaceae-Tribe Pediculareae)

scientific article

ADDITIONAL NOTES ON VERONICA ANAGALLIS-AQUATICA × CATENATA (SCROPHULARIACEAE)

scientific article published in 1977

CHROMOSOME NUMBERS OF SOME NORTH AMERICAN SCROPHULARIACEAE, MOSTLY CALIFORNIAN

scientific article published in 1992

California Serpentines: Flora, Vegetation, Geology, Soils, and Management Problems

scientific article (publication date: February 1986)

Generic Realignment and Synopsis of Subtribe Castillejinae (Scrophulariaceae-Tribe Pediculareae)

scientific article

Gentrya, a New Genus of Scrophulariaceae from Mexico

scientific article

MIMULUS NORRISII (SCROPHULARIACEAE), A NEW SPECIES FROM THE SOUTHERN SIERRA NEVADA

scientific article published in 1985

MIMULUS SHEVOCKII (SCROPHULARIACEAE), A NEW SPECIES FROM DESERT HABITATS IN THE SOUTHERN SIERRA NEVADA OF CALIFORNIA

scientific article published in 1986

NOTEWORTHY COLLECTIONS

scientific article published in 1980

New Distributional Records for California Flowering Plants of Aquatic and Moist Habitats ⬇️

scientific article published in 1975

New Species of Bee-Pollinated Castilleja from Peru, with a Taxonomic Revision of South American Members of subg. Colacus

scientific article

Nomenclatural Changes of Some Californian Castilleja (Scrophulariaceae)

scientific article

Origin and Taxonomy of Castilleja montigena (Scrophulariaceae)

scientific article

RE-EVALUATION OF BRACT MORPHOLOGY IN TAXONOMY OF CORDYLANTHUS (SCROPHULARIACEAE)

scientific article published in 1975

Status and Distribution of Castilleja Mollis (Scrophulariaceae)

scientific article published in 1991

Systematics and Evolution of Cordylanthus (Scrophulariaceae-Pedicularieae) (Including the Taxonomy of Subgenus Cordylanthus)

scientific article

TAXONOMIC STATUS OF CORDYLANTHUS (SUBG. DICRANOSTEGIA) ORCUTTIANUS (SCROPHULARIACEAE)

scientific article published in 1975

TAXONOMY AND DISTRIBUTION OF OROBANCHE VALIDA (OROBANCHACEAE)

scientific article published in 1982

THE PHYTOGEOGRAPHICAL SIGNIFICANCE OF SNOW MOUNTAIN, NORTH COAST RANGES, CALIFORNIA

scientific article published in 1984

THE SCIENTIFIC WRITINGS OF WILLIS LINN JEPSON (1867-1946)

scientific article published in 1967

Taxonomy of Cordylanthus Subgenus Hemistegia (Scrophulariaceae)

scientific article

The Vascular Plants of Snow Mountain, North Coast Ranges, California ⬇️

scientific article

Two New Species of Phacelia (Hydrophyllaceae) from California

scientific article

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