He created the Section of Foreign Seed and Plant Introduction which is a department of the United States Department of Agriculture in 1891. For 37 years, he traveled the world in search of plants of potential use to the American people. He brought into cultivation in the United States many important plants, including mangos, alfalfa, nectarines, dates, horseradish, bamboos and flowering cherries.

The Fairchild Tropical Botanical Garden in Miami, Florida is named in his honor. He made many trips to Asia to bring plants back for the gardens during the late 1930's.

Farges was a French missionary and naturalist who traveled to China in 1867. Around 1892, he began to collect plant specimens and preserved over 4,000 during his stay in China. He sent seeds of the handkerchief tree (Davidia involocrata) back to France.

He was still collecting and identifying plants in China in the 1890s during the time when E.H. Wilson was also in the area. Wilson brought some of the plants from Farges' efforts back to be introduced into Europe. Farges stayed in China until his death in 1912.

The blue bean tree (Decaisnea fargesii) is named in his honor. A few of the hundreds of plants connected with his name include Abies fargesii, Arisaema fargesii, Bashania fargesii, Catalpa fargesii, Clematis fargesii, Cypripedium fargesii, Decaisnea fargesii, Paris fargesii, Paulownia fargesii, and Rhododendron fargesii.

From 1912 to 1943, Beatrix Farrand acted as the consulting landscape architect for Princeton University in New Jersey. She also worked with campus designs at Yale and the University of Chicago. She was the only woman involved in the creation of the American Society of Landscape Architects. Her designs were used at Dartington Hall and her beautifully documented city garden of Dunbarton Oaks, Washington, D.C.

Forsythia 'Beatrix Farrand' is named in her honor.

Botanical writer and plant-hunter, Farrer was born in London and brought up in Ingleborough, England where he became interested in rock garden plants. He wrote several books on the subject including My Rock Garden and The English Rock Garden.

He was an avid plant hunter and introduced several species of Primula and Rhododendron. He died on a Burmese (Myanmar) mountain at the age of 40.

Plants discovered by him include Daphne tangutica, Buddleja alternifolia, Gentiana farrerii, Cypripedium farrerii and Viburnum farreri.

Her gardens at East Lambrook Manor in England were the topic of 8 books she wrote in the 1950s and 60s. She was influential in the movement toward informal cottage gardens.

Plants named for her include Bergenia 'Margery Fish', Penstemon 'Margery Fish', and Pulmonaria saccharata 'Margery Fish'.

Helen Field Fischer from Iowa was called by one source the “mother of the American Hemerocallis Society.” She was the "star" of the daily radio show, “Garden Club of the Air” starting in the 1920s. Her brother was the owner of the Henry Field Seed Company. The cultivar Hosta ‘Helen Field Fischer’ is named in her honor.

He served as Director of the Royal Horticultural Society Garden at Wisley from 1951-1954 and Regius Keeper of the Royal Botanic Garden in Edinburgh, Scotland. Fletcher compiled the International Rhododendron Register for the RHS and was the International Registration Authority for the genus. He was a recipient of the Victoria Medal of Honour and the Loder Rhododendron Cup.

The specific epithet, fletcheri, is named for him. Plants having this name include Chamaecyparis lawsoniana 'Fletcheri'.

He was a landscape designer and nurseryman noted for a "well-structured" informality in the garden and a long season of interest in his perennial bed designs. His nursery was near Potdsdam, Germany where he hybridized nearly 650 new varieties of plants.

Foerster was a well-known author of gardening books and articles. According to W. George Schmid in The Genus Hosta (1991), “Hostas played an important part in his landscaping philosophy in which he juxtaposed large leafy plants with grasses and ferns, making for a very pleasing balanced arrangement.

Plants named in his honor included Calamagrostis x actuiflora 'Karl Foerster', Molinia caerulea subsp. arundinacea 'Karl Foerster', Erigeron 'Foersters Liebling' and Campanula carpatica var turbinata 'Foerster'.

Nicholas Forestier redesigned the garden of Bagatelle in the Bois-de-Boulogne in Paris. He designed many gardens in Spain and also worked in the United States and South America.

George Forrest is often considered the greatest of all collectors of rhododendrons. He is credited with introducing hundreds of species from China and Tibet to the Edinburgh Botanic Garden, including R. giganteum and R. sinogrande. He was also heavily involved with members of the primrose family (Primula).

He collected over 30,000 herbarium specimens. In addition to over 300 Rhododendron, he introduced camellias, magnolias (Magnolia), Himalayan poppies (Meconopsis), lilies (Lilium), primroses (Primula) and gentians (Gentiana).

Primula forrestii and many other plants have been named in his honor. These include Iris forrestii, Hemerocallis forrestii, Abies forrestii, and Hypericum forrestii.

Forrest's plant discoveries include:

• Clematis chrysocoma and C. forrestii

• Rhododendron: souliei, sulfureum, trichocladum, neriiflorum, taliense, beesianum, irroratum, rubiginosum and others

• Lilium: thomsonianum, giganteum, delavayi and ochraceum

• Pieris forrestii

• Pleione: delavayii, grandiflora and forrestii

• Primula: malacoides, beesiana and many others.

William Forsyth from Old Meldrum, Scotland, became a distinguished horticulturist and was appointed Chief Superintendent of the Royal Gardens at Kensington and St James' Palace in 1784. He trained under Philip Miller.  In 1802 he published a "Treatise on the Culture and Management of Fruit Trees" which became a best-seller in its day.

He is best remembered now for the family of plants known as "Forsythia".

He was an eminent physician in England who, as so many in profession, was an avid botanist who maintained a large personal garden. A catalog of the plants in his gardens was published by John Lettsom. Fothergill was credited with introducing several new plants from other parts of the world into cultivation in England.

The genus, Fothergilla, was named in his honor.

After studying at the Edinburgh Botanic Garden, and at the Royal Horticultural Society gardens at Chiswick, Fortune was sent to China to find new plants by the RHS in 1843. He was the first collector in China to have relative freedom and he introduced many essential garden plants to the Western world. Fortune was also briefly the curator of the Chelsea Physic Garden in London.

His trees included the false larch (Pseudolarix), the Chinese plum yew (Cephalotaxus fortunei), the umbrella pine (Sciadopitys verticillata) and the Cryptomeria. In 1848 he returned to China and sent seeds and plants of the tea tree to India, thereby becoming the foundation for the India Tea industry.

Fortune is credited with introducing certain hostas into England and Europe. Until W. George Schmid's book The Genus Hosta in 1991, those plants were thought to be a species and were named Hosta fortunei. Schmid determined that the plants were not from a naturally occurring species and were actually cultivars created in either Asia or after introduction to Europe. So, they have been "demoted" to cultivar status and are now know by the name Hosta 'Fortunei'.

Other garden plants introduced by him include: Forsythia viridissima, Jasminium nudiflorum, Anemone japonica, Dielytra spectabilis, Kerria japonica,  Euonymus fortunei, Viburnum plicatum, Trachycarpus fortunei,  Cephalotaxus fortunei, Hosta 'Fortunei', Rhododendron fortunei, Mahonia fortunei, Pleioblastus fortunei.

A Scotsman, John Fraser started business in London as a linen-draper near the Chelsea Physic Garden. He gave up his business to become a botanist and  plant collector. Under sponsorship, he made visits to several parts of North America and the West Indies in search of plant to bring back to Europe. Most of this activity took place in the period between 1780 and 1810.

In the latter part of his career, he was the official plant collector for the Czar of Russia. He accumulated a large herbarium of plant specimens which was eventually obtained by the Linnean Society.

Among the plants he introduced was Magnolia fraserii but his most significant discovery is the species, Rhododendron catawbiense.

Plants named for him include Photinia x fraseri*, Rhododendron 'Fraseri', Abies fraseri and Chamaecyparis lawsoniana 'Fraseri'.

*Email comment from David: "Photinia fraseri is named in 1961 for Fraser Nurseries in Birmingham, Alabama and/or its president, Oliver Weston Fraser, not for John Fraser."

The specific epithet, frikartii, was named for this nurseryman from Stafa, Switzerland. The plant,  Aster x frikartii, includes this name.

German professor of medicine who was also a dedicated field botanist. He was credited with describing and illustrating over 500 plants in his book, De Historia Stirpium.

In 1693, Father Charles Plumier named the genus Fuchsia in honor of Fuchs.