Margaret Ensign Lewis

Botanist (1919-2017).

Margaret Ruth Ensign Lewis (1919 – November 2017) was an American botanist, taxonomist, and professor specializing in California flora. The International Plant Names Index lists 38 plant names published by Margaret Ruth Ensign.

Abbreviations: M.E.Lewis, Ensign
Occupations: scientific collector, curator, botanist, botanical collector
Citizenships: United States
Languages: English
Dates: 1919-01-01T00:00:00Z – 2017-00-00T00:00:00Z
Birth place: Pasadena
Direct attributions: 26 plants, 0 fungi
Authorship mentions: 31 plants, 0 fungi

26 plants attributed, 5 plants contributed to31 plants:

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.
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 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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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 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.
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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Clarkia speciosa ssp. polyantha F.H.Lewis & M.E.Lewis 1955
annual plant subspecies in the onagraceae family
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Clarkia speciosa ssp. immaculata (Pismo Clarkia) F.H.Lewis & M.E.Lewis 1955
annual plant subspecies in the onagraceae family
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Clarkia mildredae (A.Heller) F.H.Lewis & M.E.Lewis 1953
plant species in the onagraceae family
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Clarkia gracilis ssp. sonomensis (Sonoma Clarkia) (C.L.Hitchc.) F.H.Lewis & M.E.Lewis 1953
annual plant subspecies in the onagraceae family
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Clarkia biloba ssp. brandegeeae (Brandegee's Clarkia) (Jeps.) F.H. Lewis & M.E. Lewis 1982
plant subspecies in the onagraceae family
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Clarkia biloba ssp. brandegeae (Jeps.) F.H.Lewis & M.E.Lewis 1955
annual plant subspecies in the onagraceae family
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Clarkia biloba ssp. australis (Mariposa Clarkia) F.H.Lewis & M.E.Lewis 1955
annual plant subspecies in the onagraceae family
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Clarkia amoena ssp. huntiana (Hunt's Clarkia) (Jeps.) F.H.Lewis & M.E.Lewis 1955
annual plant subspecies in the onagraceae family
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Clarkia amoena ssp. caurina (Northwestern Farewell-to-spring) (Abrams) F.H.Lewis & M.E.Lewis 1955
annual plant subspecies in the onagraceae family
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Glossopetalon spinescens var. texense (Texas Greasebush) (Ensign) M.L.Allen 2021
plant variety in the crossosomataceae family
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Glossopetalon spinescens var. planitierum (Plains Greasebush) (Ensign) Yatsk. 2007
plant variety in the crossosomataceae family
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Glossopetalon spinescens var. mexicanum (Ensign) H.St.John 1942
plant variety in the crossosomataceae family
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Glossopetalon spinescens var. clokeyi (Clokey's Greasebush) (Ensign) M.L.Allen 2021
plant variety in the crossosomataceae family
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