John C. Semple

American botanist (born 1947).

John Cameron Semple (born 1947) is a botanist, cytotaxonomist, professor emeritus, and adjunct professor at the University of Waterloo in Ontario, Canada. He was born in Boston and earned a degree of Bachelor of Science in 1969 from Tufts University, followed in 1971 and 1972 by Master of Arts and Doctor of Philosophy degrees from Washington University in St. Louis. Semple is known for his work with members of the tribe Astereae, particularly goldenrods, American asters, and goldenasters, and he maintains the University of Waterloo Astereae Lab website. Semple's wife is Brenda, and in 2013, he

Abbreviations: Semple
Occupations: writer, botanist
Citizenships: Canada
Dates: 1947-01-01T00:00:00Z
Birth place: Boston
Direct attributions: 102 plants, 0 fungi
Authorship mentions: 112 plants, 0 fungi

102 plants attributed, 10 plants contributed to112 plants:

Aster verticillatus (Reinw.) Brouillet, Semple & Y.L.Chen 2011
perennial plant species in the asteraceae family
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Symphyotrichum plumosum (Plumose Aster) (Small) Semple 2002
perennial plant species in the asteraceae family
Symphyotrichum plumosum (formerly Aster plumosus) is a species of flowering plant in the family Asteraceae endemic to Florida in the United States. Commonly known as plumose aster, it is a perennial, herbaceous plant that may reach 40 to 100 centimeters (1+1⁄4 to 3+1⁄4 feet) tall. Its flowers have rose-purple ray florets and yellow turning to purple disk florets. It is of conservation concern.
Symphyotrichum nahanniense (Nahanni Aster) (Cody) Semple 2002
perennial plant species in the asteraceae family
Symphyotrichum nahanniense (formerly Aster nahanniensis) is a species of flowering plant in the family Asteraceae endemic to Northwest Territories, Canada.
Symphyotrichum chapmanii (Savannah Aster) (Torr. & A.Gray) Semple & Brouillet 2002
perennial plant species in the asteraceae family
Symphyotrichum chapmanii (formerly Aster chapmanii and Eurybia chapmanii) is a species of flowering plant in the family Asteraceae native to the Apalachicola River drainage basin of Alabama and Florida. Commonly known as savanna aster, it is a perennial, herbaceous plant that may reach 30 to 80 centimeters (1 to 2+1⁄2 feet) tall. Its flowers have purple to blue-lavender ray florets and pale yellow disk florets. It is a wetland species and is of conservation concern. It may be extirpated in Alabama.
Heterotheca shevockii (Shevock's Goldenaster) (Semple) Semple 1996
perennial plant species in the asteraceae family
Heterotheca shevockii is a rare species of flowering plant in the family Asteraceae known by the common names Kern Canyon false goldenaster and Shevock's goldenaster. It is endemic to California in the United States, where it is known only from Kern County. It grows along a 21-mile stretch of the Kern River. Heterotheca shevockii is a perennial herb growing 28 to 131 centimeters (11.2-52.4 inches) in height, often with many erect stems. The stems are hairy to bristly. The lance-shaped leaves are up to 6.5 centimeters (2.6 inches) long by 1.6 cm (0.64 inches) wide. The inflorescence contains
Heterotheca pumila (Alpine Golden-aster) (Greene) Semple 1987
perennial plant species in the asteraceae family
Heterotheca pumila, the alpine goldenaster, is a North American species of flowering plant in the family Asteraceae. It grows in alpine and subalpine regions in the mountains of the western United States. It has been found the Rocky Mountains in Wyoming, Colorado, Utah, and New Mexico. Typically, it typically grows up to about 15 inches tall, and blooms between July and September. Appearance-wise, it has multiple yellow flowers on top of a roundish mound of green-gray leaves. It is described to have a "strongly pungent" smell.
Bradburia pilosa (Soft Goldenaster) (Nutt.) Semple 1996
plant species in the asteraceae family
Bradburia pilosa, the soft goldenaster, is a North American species of flowering plant in the family Asteraceae, native to the south-central United States. It is primarily found in the southeastern Great Plains and lower Mississippi Valley, in the states of Texas, Oklahoma, Kansas, Missouri, Arkansas, Louisiana, Tennessee, Mississippi, and Alabama. Additional populations have been reported further east (from Florida to Virginia), but these appear to be introductions. Its habitats include disturbed roadsides and pine-oak-juniper woods. Bradburia pilosa is an annual plant growing up to 80 cm
Chrysopsis linearifolia (Narrowleaf Goldenaster) Semple 1978
plant species in the asteraceae family
Chrysopsis linearifolia, the narrowleaf goldenaster, is a North American species of flowering plant in the family Asteraceae. It has been found only in Florida. Chrysopsis linearifolia is a biennial herb up to 200 cm (80 inches) tall. Stems are generally unbranched and hairless. Each plant can produce as many as 100 yellow flower heads, each head with both ray florets and disc florets. The species grows in sandy and grassy locations.
Chrysopsis delaneyi (Delaney's Goldenaster) Wunderlin & Semple 2003
plant species in the asteraceae family
Chrysopsis delaneyi, or DeLaney's goldenaster, is one of the endemic species to the U.S. state of Florida, recently discovered in the genus Chrysopsis, a small group of herbaceous plants of the family Asteraceae, known commonly as the "golden asters" and primarily native and restricted to Florida.
Symphyotrichum estesii (May Prairie Aster) Semple 2019
perennial plant species in the asteraceae family
Symphyotrichum estesii is a species of flowering plant in the family Asteraceae, endemic to Coffee County, Tennessee. Commonly called May Prairie aster and Estes's aster, it is a perennial, herbaceous plant that may reach 30 to 85 centimeters (12 to 33 inches) in height. Its flowers have white ray florets and yellow disk florets. It is named in honor of botanist Dwayne Estes who discovered it in 2008.
Solidago kralii (Kral's Goldenrod) Semple 2003
plant species in the asteraceae family
Solidago kralii, common name Kral's goldenrod, is a North American plant species first described as a new species in 2003. It is found on sandy hills in oak-pine woodlands of Georgia and South Carolina. Solidago kralii is an herb up to 110 cm (44 inches) tall, with dense resin hairs on the leaves. One plant can produce as many as 200 small yellow flower heads. The species is named for American botanist Robert Kral.
Solidago argentinensis (Argentine Goldenrod) Lopez Laphitz & Semple 2011
plant species in the asteraceae family
Solidago argentinensis is South American species of flowering plants in the family Asteraceae. It is native to Argentina (Provinces of Chubut, Neuquén, Río Negro), Chile (Juncal) and Bolivia (Cochabamba). Solidago argentinensis is a perennial herb up to 50 cm (20 inches) tall spreading by means of underground rhizomes. Flower heads are in large, branching arrays at the ends of branches, sometimes drooping near the top. Each head contains 6–19 ray florets surrounding 5–19 disc florets.
Heterotheca zionensis (Zion False Goldenaster) Semple 1987
perennial plant species in the asteraceae family
Heterotheca zionensis, the Zion goldenaster, is a North American species of flowering plant in the family Asteraceae. It grows in Utah, Arizona, New Mexico and western Texas. The plant has also reportedly been found in southeastern Idaho and northwestern Colorado, but these are most likely introductions.
Heterotheca monarchensis (Monarch Goldenaster) D.A.York, Shevock & Semple 1996
perennial plant species in the asteraceae family
Heterotheca monarchensis is a rare species of flowering plant in the family Asteraceae known by the common names monarch goldenaster and sequoia false goldenaster. It is endemic to Fresno County, California, where it is known from only one location near Boyden Cave in the Kings River Canyon. It grows in the limestone cliffs of this Sierra Nevada river canyon, along with a few other rare local endemics. The plant was discovered in July, 1995, and described to science as a new species in 1996. This is a perennial herb anchored in the rocky substrate by a taproot and producing one to many erect,
Heterotheca marginata (Sonora False Goldenaster) Semple 1996
perennial plant species in the asteraceae family
Heterotheca marginata, the Sonora false goldenaster, is a rare North American species of flowering plant in the family Asteraceae. It grows in Arizona in the southwestern United States. It has been found in only three counties in the south-central part of the state: Maricopa, Pinal, and Gila.
Heterotheca brandegeei (B.L.Rob. & Greenm.) Semple 1988
plant species in the asteraceae family
Heterotheca brandegeei is a rare Mexican species of flowering plant in the family Asteraceae. The plant is endemic to Mexico, found only in the Sierra San Pedro Martir range in the state of Baja California, in the Baja California Norte region of the Baja California Peninsula. The Sierra San Pedro Martir is a mountain range in the Peninsular Ranges system of Southern California and the Baja California Peninsula.
Heterotheca barbata (Heterotheca Hirsuta) (Rydb.) Semple 1987
plant species in the asteraceae family
Heterotheca hirsuta, the Spokane false goldenaster, is a species of flowering plant in the family Asteraceae. It is found in the north-western United States, and western Canada.
Chrysopsis godfreyi (Godfrey's Goldenaster) Semple 1978
plant species in the asteraceae family
Chrysopsis godfreyi, or Godfrey's goldenaster, is a North American species of flowering plant in the family Asteraceae. It is native to the states of Florida and Alabama in the southeastern United States. Chrysopsis godfreyi is an herb up to 50 cm (20 inches) tall, with a large taproot and most of its leaves in a rosette close to the ground. It produces numerous yellow flower heads in large arrays, each head having both ray florets and disc florets. The species grows on sand dunes and other sandy areas along the Gulf Coast in southern Alabama and in the Florida Panhandle.
Aster pseudosimplex Brouillet, Semple & Y.L.Chen 2011
plant species in the asteraceae family
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Aster neolanuginosus Brouillet, Semple & Y.L.Chen 2011
plant species in the asteraceae family
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Solidago velutina ssp. sparsiflora (A.Gray) Semple 2003
perennial plant subspecies in the asteraceae family
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Solidago ptarmicoidei (Solidago Sect. Ptarmicoidei) (House) Semple & Gandhi 2004
plant section in the asteraceae family
Solidago sect. Ptarmicoidei is a section of flowering plants in the genus Solidago. They are sometimes considered a separate genus: Oligoneuron. Like related species they are known as goldenrods. This section contains seven species of perennial herbs, all native to North America. They are distinguished from other goldenrods by their corymbiform flowerheads, which are flat or rounded in profile and about as broad as tall or broader, for which they are sometimes called flat-topped goldenrods.
Solidago correllii (Guadalupe Mountains Goldenrod) Semple 2017
plant species in the asteraceae family
Solidago correllii, commonly known as the Guadalupe Mountains goldenrod, is a relatively recently described species of goldenrod found in the Guadalupe Mountains of Texas and New Mexico. Guadalupe Mountains goldenrod was once thought to be a subspecies of Solidago wrightii, which it is similar in appearance to, but recent genetic and morphological evidence has led to its recognition as a unique species.
Solidago brendae (Brenda's Goldenrod) Semple 2013
perennial plant species in the asteraceae family
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Heterotheca villosa var. minor (Hairy False Goldenaster) (Hook.) Semple 1994
plant variety in the asteraceae family
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Heterotheca sessiliflora ssp. bolanderi (Bolander's Goldenaster) (A.Gray) Semple 1993
plant subspecies in the asteraceae family
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Aster yuanqunensis (J.Q.Fu) Brouillet, Semple & Y.L.Chen 2011
plant species in the asteraceae family
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Aster sinoangustifolius Brouillet, Semple & Y.L.Chen 2011
plant species in the asteraceae family
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Aster lushiensis (J.Q.Fu) Brouillet, Semple & Y.L.Chen 2011
plant species in the asteraceae family
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Aster lixianensis (J.Q.Fu) Brouillet, Semple & Y.L.Chen 2011
plant species in the asteraceae family
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