Theodor Loesener

German botanist (1865–1941).

Ludwig Eduard Theodor Lösener (23 November 1865 – 2 June 1941) was a German botanist who collected widely in the field in Germany: Amrum island (1912), the Alps, the Black Forest, Bavaria, Rügen island and Tyrol in modern Austria. His speciality was the Aquifoliaceae of the world. He also studied cultivars of Ilex species. His name is usually spelled as 'Loesener' in English sources. In 1941, botanist Albert Charles Smith published the genus Loeseneriella, in the family Celastraceae, in his honour. The standard author abbreviation Loes. is used to indicate this person as the authority when cit

Abbreviations: Loes.
Occupations: scientific collector, independent scholar, botanist, botanical collector
Citizenships: Kingdom of Prussia, German Reich
Languages: German
Dates: 1865-11-23T00:00:00Z – 1941-06-02T00:00:00Z
Birth place: Berlin
Direct attributions: 381 plants, 0 fungi
Authorship mentions: 499 plants, 0 fungi

381 plants attributed, 118 plants contributed to499 plants:

Ilex guayusa (Guayusa) Loes. 1901
plant species in the aquifoliaceae family
Ilex guayusa ( or ) is a species of tree in the holly family, Aquifoliaceae. It is native to the Amazon rainforest. One of four known caffeinated holly trees, the leaves of the guayusa tree are harvested fresh and brewed like a tea for their stimulative effects. It is known simply as guayusa in western languages like Spanish, as waisa in Kichwa and as wayus or wais in Shuar.
Gymnosporia senegalensis (Confettitree) (Lam.) Loes. 1893
plant species in the celastraceae family
Maytenus senegalensis, also known as arto, arto negro or espino cambrón in Spanish is a thorny shrub of the Celastraceae family. Endemic to Ibero-Africa, it is an endangered species and listed as vulnerable. It contains cathinone and cathine. In The Plant List it is considered a synonym of Gymnosporia senegalensis. Two subspecies of Maytenus senegalensis are recognized: Maytenus senegalensis subsp. europaea (Spain and North Africa). Maytenus senegalensis subsp. senegalensis (tropical Africa and Asia).
Gymnosporia heterophylla (Angle-stem Spikethorn) (Eckl. & Zeyh.) Loes. 1896
plant species in the celastraceae family
Gymnosporia heterophylla, the common spike-thorn, is a small, hardy, deciduous African tree up to 5 m tall, occurring in rocky places with a wide distribution from Ethiopia, the Sudan and the Congo, south to the Cape Province and west to Angola and Namibia, as well as the neighbouring islands of Madagascar and Saint Helena, with a closely related species from Mauritius. It has a straggly, but rigid habit and is armed with sharp straight thorns up to 100mm long, which are modified branches. Bark on the mature trunk is grey-brown and deeply fissured. The tree is dioecious, and clusters of white
Thyrsosalacia Loes. 1940
plant genus in the celastraceae family
Thyrsosalacia is a genus of flowering plants belonging to the family Celastraceae. Its native range is Cameroon and Gabon. Species: Thyrsosalacia nematobrachion Loes. Thyrsosalacia pararacemosa N.Hallé Thyrsosalacia racemosa (Loes. ex Harms) N.Hallé Thyrsosalacia viciifolia N.Hallé
Salacighia Loes. 1940
plant genus in the celastraceae family
Salacighia is a genus of flowering plants belonging to the family Celastraceae. Its native range is Cameroon, the Central African Republic, the Republic of the Congo, the Democratic Republic of the Congo, Equatorial Guinea, Gabon, Guinea, Ivory Coast, Liberia, Nigeria, Sierra Leone, and Uganda. Species: Salacighia letestuana (Pellegr.) Blakelock Salacighia linderi (Loes. ex Harms) Blakelock
Ilex brasiliensis Loes. 1897
plant species in the aquifoliaceae family
Ilex brasiliensis, the Brazilian holly, is a species of the genus Ilex in the family Aquifoliaceae. It is native to Brazil, Paraguay and northern Argentina, and is typically found in Cerrado vegetation. It is occasionally used as an adulterant in maté.
Euonymus sanguineus Loes. 1900
plant species in the celastraceae family
Euonymus sanguineus, the blood red spindle, is a species of flowering plant in the family Celastraceae. It is native to Nepal, and to nearly all of China except Xinjiang, Manchuria, and Hainan. A deciduous shrub reaching 3 to 5 m (10 to 16 ft), it is typically found in scrublands and mixed evergreen/deciduous forests, at elevations from 1,800 to 3,700 m (6,000 to 12,000 ft). It may be available from specialty suppliers.
Euonymus phellomanus (Corktree) Loes. 1900
medicinal plant species in the celastraceae family
Euonymus phellomanus (corky spindle) is a species of flowering plant in the family Celastraceae. It is native to China. A substantial deciduous shrub growing to 2–4 m (6.6–13.1 ft) tall by 2.5 m (8.2 ft) broad, it produces insignificant yellow-green flowers in May followed by brilliant pink fruit in autumn. Like other spindles, the fruit break open to reveal bright orange seeds when ripe. A notable feature is the rough corky bark which with age develops "wings" clothing the length of each branch; the element phellos in its name is from the Ancient Greek for cork. A similar effect is seen in
Olmediella betschleriana (Göpp.) Loes. 1905
plant species in the salicaceae family
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Ilex wilsonii Loes. 1908
medicinal plant species in the aquifoliaceae family
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Ilex hayatana Loes. 1941
plant species in the aquifoliaceae family
Ilex hayatana is a species of flowering plant in the holly family, Aquifoliaceae. It is native to Taiwan. There is some confusion about the identity of this species; for example Flora of China states that it is an evergreen tree with "pale gray‑black" bark reaching 12 m (39 ft) tall, found in forests at 200 to 300 m (700 to 1,000 ft) a.s.l., and also native to Japan, but the International Dendrology Society states that the original specimen, which is still alive, lives at 1,900 m (6,200 ft) and was described as either an 18 m (59 ft) tree or a 4 m (13 ft) shrub.
Gymnosporia bachmannii (Willow Kokotree) Loes. 1894
vulnerable plant species in the celastraceae family
Gymnosporia bachmannii is a species of flowering plant in the family Celastraceae. It is a shrub or tree endemic to the Cape Provinces and KwaZulu-Natal in South Africa. It is threatened by habitat loss.
Costus erythrophyllus Loes. 1929
plant species in the costaceae family
Costus erythrophyllus is species of flowering plant in the family Costaceae. It is a tropical rhizomatous perennial plant native to Colombia, Ecuador, Peru, and northern Brazil. It was first described in 1929. The most common form in cultivation grows to about 1 meter in height, with waxy leaves that are dark green on top, and deep purple underneath. In Huambisa, Costus erythrophyllus is known as untuntu.
Psammomoya choretroides Diels & Loes. 1904
plant species in the celastraceae family
Psammomoya choretroides is a small shrub in the Celastraceae family, endemic to the south west of Western Australia. It was first described by Ferdinand von Mueller in 1889 as Logania choretroides, but was transferred to the genus, Psammomoya, in 1904 by Ludwig Diels and Ludwig Eduard Theodor Loesener.
Psammomoya Diels & Loes. 1904
plant genus in the celastraceae family
Psammomoya is a genus of plants in the family Celastraceae. The genus is endemic to Western Australia and was first described by Ludwig Diels and Ludwig Eduard Theodor Loesener in 1904, with the designated type species being Psammomoya choretroides. There are four species in the genus: Psammomoya choretroides (F.Muell.) Diels & Loes. Psammomoya ephedroides Diels & Loes. Psammomoya grandiflora Keighery Psammomoya implexa Keighery
Mystroxylon aethiopicum (Koobooberry) (Thunb.) Loes. 1897
plant species in the celastraceae family
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Menepetalum Loes. 1906
plant genus in the celastraceae family
Menepetalum is a genus of shrubs and small trees in the family Celastraceae. The genus is endemic to New Caledonia in the Pacific and contains four species. Its closest relative is Dinghoua from Australia.
Mauria trichothyrsa Loes. 1906
critically endangered plant species in the anacardiaceae family
Mauria trichothyrsa is a species of flowering plant in the family Anacardiaceae. It is endemic to Peru.
Ilex subrugosa Loes. 1911
plant species in the aquifoliaceae family
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Ilex maximowicziana (Maximowicz's Holly) Loes. 1901
plant species in the aquifoliaceae family
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Ilex intermedia Loes. 1901
plant species in the aquifoliaceae family
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Ilex ericoides Loes. 1901
vulnerable plant species in the aquifoliaceae family
Ilex ericoides is a species of flowering plant in the family Aquifoliaceae. It is native to Colombia, Ecuador, and Peru.
Ilex ciliospinosa (September Gem Holly) Loes. 1911
plant species in the aquifoliaceae family
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Gymnosporia arbutifolia (Hochst. ex A.Rich.) Loes. 1893
plant species in the celastraceae family
Gymnosporia arbutifolia is a species of flowering plant in the family Celastraceae. It is a thorny shrub or tree native to eastern Africa and the Arabian Peninsula. It grows in the mountains of eastern Africa, from the Ethiopian Highlands to the Albertine Rift, and to the southeastern Arabian Peninsula, from 1350 to 2080 meters elevation. Two subspecies are accepted: Gymnosporia arbutifolia subsp. arbutifolia – Burundi, Democratic Republic of the Congo, Djibouti, Eritrea, Ethiopia, Kenya, Rwanda, Saudi Arabia, Somalia, Tanzania, Uganda, and Yemen. Gymnosporia arbutifolia subsp. sidamoensis
Gymnosporia addat Loes. 1908
vulnerable plant species in the celastraceae family
Gymnosporia addat is a species of flowering plant in the family Celastraceae. It is endemic to the Afromontane forests, especially along forest margins, of Ethiopia.
Euonymus nanoides Loes. & Rehder 1913
plant species in the celastraceae family
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Euonymus dielsianus Loes. 1900
medicinal plant species in the celastraceae family
Euonymus dielsianus is a species of flowering plant in the family Celastraceae. It was first described by the German botanists Ludwig E. T. Loesener and Ludwig Diels in 1900. The plant is mostly found in southwestern portion of China, at elevations between 200 and 1,600 meters above the sea level.
Celastrus rosthornianus Loes. 1900
medicinal plant species in the celastraceae family
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Celastrus hypoleucus (Oliv.) Warb. ex Loes. 1900
medicinal plant species in the celastraceae family
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Celastrus gemmatus Loes. 1902
medicinal plant species in the celastraceae family
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