Harlan Lewis

Botanist (1919-2008).

Frank Harlan Lewis (January 8, 1919 – December 12, 2008) was an American botanist, geneticist, taxonomist, systematist, and evolutionist who worked primarily with plants in the genus Clarkia. He is best known for his theories of "catastrophic selection" and "saltational speciation", which are closely aligned with the concepts of quantum evolution and sympatric speciation. The concepts were first articulated in 1958 by Lewis and Peter H. Raven, and later refined in a 1962 paper by Lewis in which he coined the term "catastrophic selection". In 1966, he referred to the same mechanism as "saltat

Abbreviations: F.H.Lewis
Occupations: university teacher, geneticist, botanist
Citizenships: United States
Languages: English
Dates: 1919-01-01T00:00:00Z – 2008-01-01T00:00:00Z
Birth place: Redlands
Direct attributions: 48 plants, 0 fungi
Authorship mentions: 51 plants, 0 fungi

48 plants attributed, 3 plants contributed to51 plants:

Clarkia franciscana (Presidio Clarkia) F.H.Lewis & P.H.Raven 1958
annual plant species in the onagraceae family
Clarkia franciscana is a rare species of flowering plant in the evening primrose family known by the common name Presidio clarkia. It is endemic to the San Francisco Bay Area of California, where it is known only from two populations at the Presidio of San Francisco and three occurrences in Oakland. The plant is known only from serpentine soils.
Clarkia speciosa (Redspot Clarkia) F.H.Lewis & M.E.Lewis 1953
annual plant species in the onagraceae family
Clarkia speciosa is a species of flowering plant in the evening primrose family known by the common name redspot clarkia. It is endemic to California, where it is known from the Central Coast and mountains and from the Sierra Nevada foothills. The plant is variable across its intergrading subspecies, taking a decumbent to erect form with a stem up to about half a meter long. The open or dense inflorescence has opening flowers and several closed buds. As the bud opens the sepals all separate from each other. The fan-shaped petals are up to 2.5 centimeters long and may be lavender to pink to
Clarkia rubicunda (Ruby Chalice Clarkia) (Lindl.) F.H.Lewis & M.E.Lewis 1953
annual plant species in the onagraceae family
Clarkia rubicunda is a flowering plant endemic to California. It is found mostly on the Central Coast part of the state. The plant is known by the common names Ruby Chalice Clarkia and Farewell to Spring. Clarkia rubicunda bears attractive poppy-like blooms with wide, cup-shaped corollas of four pink or purplish petals. The corolla of the flower sometimes has a bright red center. As the common name suggests, it blooms in June and July. It is similar in appearance to another flower of genus Clarkia, the Clarkia amoena, also called "Farewell to Spring".
Clarkia cylindrica (Speckled Clarkia) (Jeps.) F.H.Lewis & M.E.Lewis 1953
annual plant species in the onagraceae family
Clarkia cylindrica is a species of flowering plant in the evening primrose family known by the common name speckled fairy fan, or speckled clarkia. It is endemic to California, where it grows in the chaparral, oak woodlands, and grasslands of the southern California Coast Ranges, western Transverse Ranges, and southern Sierra Nevada foothills.
Trichostema ruygtii (Napa Bluecurls) F.H.Lewis 2006
annual plant species in the lamiaceae family
Trichostema ruygtii, with the common name Napa bluecurls, is a species of flowering plant in the mint family. It was first described to science in 2006.
Gayophytum heterozygum (Zigzag Groundsmoke) F.H.Lewis & Szweyk. 1964
annual plant species in the onagraceae family
Gayophytum heterozygum is a species of flowering plant in the evening primrose family known by the common name zigzag groundsmoke. It is native to the western United States where it grows mainly in forested mountain habitat. This is a spindly annual herb with a few forking branches which approaches 80 centimeters in maximum height. It has a sparse foliage of small, narrow leaves, most of which are on the lower half of the plant. It produces tiny white flowers toward the tops of the thin stems. The fruit is a lumpy-looking capsule.
Delphinium umbraculorum (Umbrella Larkspur) F.H.Lewis & Epling 1954
perennial plant species in the ranunculaceae family
Delphinium umbraculorum is a species of larkspur known by the common name umbrella larkspur. However, its epithet does not denote an umbrella. Instead, it describes the habitat of this plant, usually shady and cool places. It is often confused with D. parryii which has similar flowers and D. patens which has similar stems and leaves. It is endemic to California, where it grows in the woodlands of the coastal mountain ranges from Monterey to Ventura Counties. It is a perennial herb producing an erect stem 40 to about 80 centimeters tall. The hairless leaves are located at the base of the plant
Delphinium inopinum (Unexpected Larkspur) (Jeps.) F.H.Lewis & Epling 1954
perennial plant species in the ranunculaceae family
Delphinium inopinum is a species of larkspur known by the common name unexpected larkspur. It is endemic to the Sierra Nevada of California, where it is known mostly from rocky areas in open temperate coniferous forest habitat.
Clarkia williamsonii (Fort Miller Clarkia) (Durand & Hilg.) F.H.Lewis & M.E.Lewis 1953
annual plant species in the onagraceae family
Clarkia williamsonii is a species of flowering plant endemic to California, where it is known from the forests and woodlands of the northern and central Sierra Nevada foothills.
Clarkia mildrediae (Mildred's Clarkia) (A.Heller) F.H.Lewis & M.E.Lewis 1953
annual plant species in the onagraceae family
Clarkia mildrediae is an uncommon species of flowering plant in the evening primrose family known by the common name Mildred's clarkia. It is endemic to California, where it is known from the forests of the southernmost Cascade Range and northern Sierra Nevada. It is an erect annual herb often exceeding half a meter in height. The oval leaves grow up to 6 centimeters long and are borne on petioles of up to 4 centimeters. The inflorescence bears opening flowers and hanging, pointed flower buds. As the bud opens the sepals all separate instead of remaining fused as those of many other Clarkia
Clarkia imbricata (Vine Hill Clarkia) F.H.Lewis & M.E.Lewis 1953
annual plant species in the onagraceae family
Clarkia imbricata is a rare species of flowering plant in the evening primrose family known by the common name Vine Hill clarkia. It is endemic to Sonoma County, California, where it is known from only one remaining natural occurrence near Vine Hill. A second natural population located on private land was extirpated when the owners plowed up the soil crust. The California Native Plant Society has established a third population from cuttings and is tending it in a reserve. This is a federally listed endangered species. Vine Hill clarkia is an annual herb growing erect to about half a meter in
Clarkia exilis (Kern River Clarkia) F.H.Lewis & Vasek 1954
annual plant species in the onagraceae family
Clarkia exilis is a small herbaceous annual plant of western North America. It is an uncommon species in the evening primrose family known by the common names Kern River clarkia and slender clarkia.
Clarkia davyi (Davy's Clarkia) (Jeps.) F.H.Lewis 1953
annual plant species in the onagraceae family
Clarkia davyi is a species of flowering plant in the evening primrose family known by the common name Davy's fairy fan, or Davy's clarkia. It is endemic to California, where it grows in coastal habitats such as beaches and bluffs. This is an annual herb producing a thin stem which grows along the ground or somewhat upright. It is lined with small oval-shaped leaves one or two centimeters long. While in bud the flower is enclosed in four fused thick sepals. It blooms into a petite bowl-shaped corolla of four pink petals which often have lighter bases. Each petal is 5 to 11 millimeters long.
Clarkia bottae (Botta's Clarkia) (Spach) F.H.Lewis & M.E.Lewis 1953
annual plant species in the onagraceae family
Clarkia bottae is a species of wildflower with several common names, including punchbowl godetia, Botta's clarkia, Botta's fairy fan, and hill clarkia.
Clarkia tenella (Cav.) F.H.Lewis & M.E.Lewis 1953
annual plant species in the onagraceae family
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Gayophytum decipiens (Deceptive Groundsmoke) F.H.Lewis & Szweyk. 1964
annual plant species in the onagraceae family
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Clarkia similis (Ramona Clarkia) F.H.Lewis & W.R.Ernst 1953
annual plant species in the onagraceae family
Clarkia similis is a species of flowering plant in the evening primrose family known by the common name Ramona clarkia. It is endemic to California, where it is found in the coastal hills and mountains of the southwestern part of the state. It is an annual herb that grows erect, approaching a meter in maximum height. The inflorescence bears open flowers and closed, hanging flower buds. The sepals remain fused as the petals bloom from one side. The petals are less than a centimeter long and oval to diamond in shape. They are pale pink with white near the bases, and sometimes purple-speckled.
Clarkia prostrata (Prostrate Clarkia) F.H.Lewis & M.E.Lewis 1953
annual plant species in the onagraceae family
Clarkia prostrata is a species of flowering plant in the evening primrose family known by the common name prostrate clarkia. It is endemic to the coastline of San Luis Obispo County, California, where it grows on seaside bluffs in forested and grassy areas. This annual herb is prostrate as opposed to erect as most other Clarkia species are. Its stems extend to a maximum length approaching half a meter and are usually somewhat fuzzy in texture. The leaves are oval in shape, up to 2.5 centimeters long, and lack petioles. The sepals of the flower separate into two pairs, revealing the
Clarkia lingulata (Merced Clarkia) F.H.Lewis & M.E.Lewis 1953
annual plant species in the onagraceae family
Clarkia lingulata is a rare species of wildflower known by the common name Merced clarkia. This plant is endemic to Mariposa County, California, where it is known from only two sites near the Merced River. It is thought to have evolved very rapidly, outside the usual model of allopatric speciation, from its parental species Clarkia biloba. It is a state-listed endangered species in California.
Clarkia lassenensis (Lassen Clarkia) (Eastw.) F.H.Lewis & M.E.Lewis 1953
annual plant species in the onagraceae family
Clarkia lassenensis is a species of wildflower known by the common name Lassen clarkia. This plant is native to the US states of California, Oregon, and Nevada, where it grows in the mountains and forested plateau. The plant erects a spindly stem and bears sparse narrow leaves. The bowl-shaped flower has four lavender petals with reddish bases, each about one centimeter long. Clarkia lassenensis is pollinated by both native bees and butterflies and is usually in bloom in the late spring early summer months of May and June. The flower is a resident of Mount Lassen, from which it gets its name.
Clarkia heterandra (Mountain Clarkia) (Torr.) F.H.Lewis & P.H.Raven 1992
annual plant species in the onagraceae family
Clarkia heterandra is a species of flowering plant in the family Onagraceae known by the common name mountain clarkia. It is endemic to California, where it is from the forests and woodlands of several of eastern and western mountain ranges. It is an annual herb producing an erect, glandular stem to around half a meter in maximum height. The lance-shaped to oval leaves are up to 8 centimeters long and are borne on petioles of up to 2 centimeters. The top of the stem is occupied by the inflorescence, with open flowers and closed buds. The sepals remain fused as the flower blooms from one side.
Clarkia affinis (Chaparral Clarkia) F.H.Lewis & M.E.Lewis 1953
annual plant species in the onagraceae family
Clarkia affinis, commonly known as chaparral clarkia, is a species of wildflower in the family Onagraceae. It is endemic to California, where it grows mainly on chaparral slopes and woodlands in the Coast Ranges. This is a spindly plant producing erect stems exceeding half a meter in height and sparse narrow leaves. The flower is a bowl-shaped bloom with four pink or red petals each 5 to 15 millimeters long. The petals may have darker spots near the base and purple or red speckling.
Gayophytum oligospermum (Pinegrove Groundsmoke) F.H.Lewis & Szweyk. 1964
annual plant species in the onagraceae family
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Clarkia gracilis ssp. albicaulis (White-stemmed Clarkia) (Jeps.) F.H.Lewis & M.E.Lewis 1953
annual plant subspecies in the onagraceae family
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Clarkia amoena ssp. whitneyi (Whitney's Farewell-to-spring) (A.Gray) F.H.Lewis & M.E.Lewis 1955
annual plant subspecies in the onagraceae family
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Clarkia purpurea ssp. viminea (Twiggy Clarkia) (Douglas) F.H.Lewis & M.E.Lewis 1955
annual plant subspecies in the onagraceae family
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Clarkia purpurea ssp. quadrivulnera (Small-flowered Clarkia) (Douglas ex Lindl.) F.H.Lewis & M.E.Lewis 1955
annual plant subspecies in the onagraceae family
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Clarkia amoena ssp. lindleyi (Lindley's Clarkia) (Douglas) F.H.Lewis & M.E.Lewis 1955
annual plant subspecies in the onagraceae family
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Trichostema austromontanum ssp. compactum (Hidden Lake Bluecurls) F.H.Lewis 2021
annual plant subspecies in the lamiaceae family
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Gayophytum diffusum ssp. parviflorum (Spreading Groundsmoke) F.H.Lewis & Szweyk. 1964
annual plant subspecies in the onagraceae family
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