Loefgrenianthus

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Loefgrenianthus
Loefgrenianthus blanche-amesiae.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Epidendroideae
Tribe: Epidendreae
Subtribe: Laeliinae
Genus: Loefgrenianthus
Hoehne
Species:
L. blanche-amesiae
Binomial name
Loefgrenianthus blanche-amesiae

Loefgrenianthus blanche-amesiae is a showy orchid species, inhabitant of Serra do Mar mountains in Brazilian southeast. It is the only species of the monotypic genus Loefgrenianthus. It can be differentiated from its closest genus, Leptotes , both because of its pending vegetation with flat leaves and the flowers which have a saccate labellum. Loefgrenianthus blanche-amesiae is highly appreciated by orchid collectors.

Contents

Distribution and habit

Loefgrenianthus blanche-amesiae is a small epiphytic species which inhabits the highest areas of Atlantic Forest of Rio de Janeiro, São Paulo and Paraná States of Brazil, [1] [2] particularly in Serra da Mantiqueira and Serra do Mar chains of mountains, where it is very rare. It grows under the shadow of trees in shady, humid and well ventilated woods, between 1,000 and 2,200 meters of altitude on mountains slopes. It ordinarily grows at middle height, pending from thick stems, mostly of Podocarpus and Araucaria species, [3] despite there are records of plants occasionally growing in thin branches too. [4]

The culture of Loefgrenianthus blanche-amesiae is reportedly hard. Because of its pending habit it should be mounted on a vegetable fiber plaque or on a piece of bark and kept sheltered form straight sunlight in a cool, humid and well ventilated place. [4]

Description

Measures (mm)
StructureWidth
Rhizome101
Leaf305
Pseudobulb21
Inflorescence101
Flower20
Sepal83
Petal73
Labellum73

Loefgrenianthus blanche-amesiae usually are attached to their hosts' stems by a knot of thin pinkish few branched elongated strong roots that grow mostly at the base of their stems. Adventitious roots are uncommon and possibly grow just occasionally when the stems become very long. The stems are thin, flexible and pending, formed by a simple but occasionally bifurcating elongated rhizome, and tiny pseudobulbs. The rhizome is completely covered by thin dried imbricating steaths and, after three internodes, usually gives birth to a pseudobulb always hidden by a dried narrow steath. The pseudobulbs are spaced at one-centimeter intervals and have only one apical flat, but folded at the base, elliptical lanceolated and comparatively large leaf. The leaves last for some years, and normally there are about seven pseudobulbs with leaves at the end of the stem. The older leaves at the base of the stem fall so the older segments of the plant usually are formed just by a number of bare stems and the important roots to attach the plant to the stem, occasionally showing a new growth. The inflorescences shoot from the apexes of the last one or two pseudobulbs and are apical, short and pending, bearing just one flower which faces the ground. [5]

The flowers are comparatively large in relation to the plant size, with segments that do not completely open. The petals and sepals are white and oblong, the sepals slightly larger than the petals, sometimes with the apexes reflected. The petals are similar to the sepals but slightly narrower at the base. The labellum is strong yellow margined of bright purple; at the base it is fused to the column base forming a narrow spur shaped nectary; it is internally slightly pubescent and has a thick callus that splits in five digitate keels on the disk; the central lobe is partially saccate and has two longer fringes at the apex. The column is white almost cylindrical without any appendages. The anther, contrasting to the flower, is very bright purple, apical, bearing six pollinia, four small and two large, hold by a caudicle similar to the ones of Leptotes. [5]

Loefgrenianthus blanche-amesiae blooms between the middle of the spring and early summer and the flowers last for about a week. Its pollinators are unknown, however, because of its color, they may be night moths, [4] or bees due to the flowers structure. [3]

Taxonomic notes

The Swedish-Brazilian botanist Johan Albert Constantin Löfgren lived many years in Brazil where he was studying the flora of Minas Gerais State, painting watercolors of plants and was a director of Rio de Janeiro Botanical Garden. In 1896 while looking for new specimens on Serra da Mantiqueira, in Rio de Janeiro, he came across a small plant he did not recognize. At the time the Belgian Botanist Célestin Alfred Cogniaux was working on the noted Flora Brasiliensis of Carl Friedrich Philipp von Martius, an encyclopedia that described all plant species of Brazil known at the time. Therefore, trying to establish its identity, Loefgren sent the plant he found to Cogniaux, however, the specimen was lost and never recovered. [5]

In 1915 the professor Oakes Ames, botanist responsible for the herbarium of Harvard University, and his wife Blanche were traveling in Brazil and met Loefgren. Together they accidentally found, on the slopes of Itatiaia mountain, another specimen of the plant which had been lost almost ten years before. [6] This time Loefgren decided to describe the species himself and, considering it close to Leptotes, placed it under this genus with the name Leptotes blanche-amesiae, honoring Professor Ames's wife. [7] In 1927, a later work on the genus Leptotes by Frederico Carlos Hoehne led him to conclude that this species, despite being closely related to it, would be better placed in another genus, therefore he proposed the genus Loefgrenianthus, in reference to Loefgren who, besides discovering the species twice, had described it. [8]

According to Cássio van den Berg, who studied their phylogeny, Loefgrenianthus is closely related to Leptotes and both form a sister clade to another small clade that includes Pseudolaelia , Constantia and Isabellia . The two clades constitute Isabellia alliance, which is one of the eight clades of subtribus Laeliinae. [9]

Related Research Articles

<i>Bulbophyllum</i> Genus of orchids

Bulbophyllum is a genus of mostly epiphytic and lithophytic orchids in the family Orchidaceae. It is the largest genus in the orchid family and one of the largest genera of flowering plants with more than 2,000 species, exceeded in number only by Astragalus. These orchids are found in diverse habitats throughout most of the warmer parts of the world including Africa, southern Asia, Latin America, the West Indies, and various islands in the Indian and Pacific Oceans. Orchids in this genus have thread-like or fibrous roots that creep over the surface of trees or rocks or hang from branches. The stem is divided into a rhizome and a pseudobulb, a feature that distinguished this genus from Dendrobium. There is usually only a single leaf at the top of the pseudobulb and from one to many flowers are arranged along an unbranched flowering stem that arises from the base of the pseudobulb. Several attempts have been made to separate Bulbophyllum into smaller genera, but most have not been accepted by the World Checklist of Selected Plant Families.

<i>Oncidium</i> Genus of orchids

Oncidium, abbreviated as Onc. in the horticultural trade, is a genus that contains about 330 species of orchids from the subtribe Oncidiinae of the orchid family (Orchidaceae). As presently conceived, it is distributed across much of South America, Central America, Mexico and the West Indies, with one species (O. ensatum) extending into Florida. Common names for plants in this genus include dancing-lady orchid and golden shower orchid.

<i>Cattleya</i> Genus of orchids

Cattleya is a genus of orchids from Costa Rica south to Argentina. The genus is abbreviated C in trade journals.

<i>Laelia</i> Genus of orchids

Laelia is a small genus of 25 species in the orchid family (Orchidaceae). Laelia species are found in areas of subtropical or temperate climate in Central and South America, but mostly in Mexico. Laelia is abbreviated L. in the horticultural trade.

<i>Spathoglottis</i> Genus of orchids

Spathoglottis, commonly known as purple orchids or 苞舌兰属 is a genus of about fifty species of orchids in the family Orchidaceae. They are evergreen terrestrial herbs with crowded pseudobulbs, a small number of leaves and medium-sized resupinate flowers on an upright flowering stem. The sepals and petals are all similar to each other and are white, yellow, pink or purple. Species of Spathoglottis are found from eastern and south-eastern Asia to Australia and some Pacific Islands.

<i>Miltonia</i> Genus of orchids

Miltonia, abbreviated Milt. in the horticultural trade, is an orchid genus comprising twelve epiphyte species and eight natural hybrids. The miltonias are exclusively inhabitants of Brazil, except for one species whose range extends from Brazil into the northeast of Argentina and the east of Paraguay.

<i>Leptotes</i> (plant) Genus of orchids

Leptotes, abbreviated Lpt in horticultural trade, is a genus of orchids formed by nine small species that grow in the dry jungles of south and southeast Brazil, and also in Paraguay or Argentina. They are small epiphytic plants of caespitose growth that sometimes resemble little Brassavola, as they share the same type of thin terete leaves, though they are more closely related to Loefgrenianthus.

<i>Houlletia</i> Genus of orchids

Houlletia is a genus of large-growing epiphytic orchids native to Mexico, and possibly also Guatemala through Central America to Bolivia. was established with the publication by Brogniartt of Houlletia brocklehurstiana in 1841. The genus is named in honor of orchid collector and grower M. Houllet, French orchid collector in Brazil, later the director of the Botanic Jardin des Plantes in Paris, 19th century.

<i>Adamantinia</i> Genus of orchids

Adamantinia is a monotypic genus of orchids, described in 2004 by Cássio van den Berg and Cezar Neubert Gonçalves. The name is a reference to Chapada Diamantina, Brazil, where this species comes from.

<i>Aspasia</i> (plant) Genus of orchids

Aspasia, abbreviated as Asp. in the horticultural trade, is a genus of 7 species of orchids occurring from southern Mexico to southern Brazil. The genus is closely related to Miltonia and Brassia. Aspasia species have few medium size flowers of exquisite colors which are occasionally cultivated or used to produce artificial hybrids.

<i>Bifrenaria</i> Genus of orchids

Bifrenaria, abbreviated Bif. in horticultural trade, is a genus of plants in family Orchidaceae. It contains 20 species found in Panama, Trinidad and South America. There are no known uses for them, but their abundant, and at first glance artificial, flowers, make them favorites of orchid growers.

<i>Scuticaria</i> (plant) Genus of orchids

Scuticaria is a genus of orchids comprising 9 species native to Belize, Brazil, Ecuador, French Guiana, Guyana, Peru, Suriname and Venezuela. Members of this genus have showy flowers and long cylindrical leaves. They are epiphytic, occasionally lithophytic or terrestrial, that grow pending and are cespitously, or reptant and ascending, which exist is three isolated areas of South America, in Ecuador, Amazon Forest and Serra do Mar and Serra da Mantiqueira mountains, in Brazil, both in shady and sunny places.

<i>Trigonidium</i> (plant) Genus of orchids

Trigonidium, abbreviated as Trgdm in horticultural trade, is a genus of orchids comprising roughly twenty species found from Mexico to Brazil.

<i>Epidendrum secundum</i> Species of plant

Epidendrum secundum, one of the crucifix orchids, is a poorly understood reed stemmed species, which Dressler (1989) describes as "the Epidendrum secundum complex." According to Dressler, there are dozens of varieties, some of which appear to deserve species rank. Arditti and Ghani note that E. secundum has the distinction of bearing the longest seeds known in the Orchidaceae, 6.0 mm long. By comparison, the seeds of E. ibaguense are only 2.9 mm long.

<i>Pholidota</i> (plant) Genus of orchids

Pholidota, commonly known as rattlesnake orchids, is a genus of flowering plants from the orchid family, Orchidaceae. Plants in this genus are clump-forming epiphytes or lithophytes with pseudobulbs, each with a single large leaf and a large number of small, whitish flowers arranged in two ranks along a thin, wiry flowering stem that emerges from the top of the pseudobulb. There are about thirty five species native to areas from tropical and subtropical Asia to the southwestern Pacific.

<i>Isabelia</i> Genus of orchids

Isabelia is an orchid genus formed by three tiny species and one natural hybrid, spread from the Northeast of Brazil to Argentina, which are closely related to the genus Constantia. During more than a century Isabelia was a genus formed by just one species, however, around 1968, it was merged with genus Neolauchea, also unispecific. In 2001, a third genus was added to it, Sophronitella. The genus name is abbreviated Isa. in cultivation.

<i>Phymatochilum</i> Genus of orchids

Phymatochilum brasiliense is an orchid species, inhabitant of Serra do Mar mountains in Brazilian southeast and northeast, which vegetatively resembles Oncidium species, however, is more closely related to the genus Miltonia. It is the only species of the genus Phymatochilum.

<i>Thelasis</i> Genus of orchids

Thelasis, commonly known as fly orchids, is a genus of flowering plants from the orchid family, Orchidaceae. Plants in this genus are usually epiphytes, sometimes lithophytes or rarely terrestrials. Some species have pseudobulbs with up to three leaves, whilst others have several leaves in two ranks. A large number of small, white or greenish yellow flowers are borne on a thin, arching flowering stem. There are about thirty species, distributed from tropical and subtropical Asia to the southwest Pacific.

<i>Trigonidium obtusum</i> Species of orchid

Trigonidium obtusum, the blue-leaved trigonidium, is an orchid found in Brazil that flowers in the summer.

Jejewoodia is a genus of flowering plants belonging to the family Orchidaceae.

References

  1. Pabst, Guido & Dungs, Fritz : Orchidaceae Brasilienses vol. 1 p. 148. Brucke-Verlag Kurt Schmersow, Hildesheim, 1975. ISBN   3-87105-010-6
  2. "Loefgrenianthus Hoehne | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 2 July 2022.
  3. 1 2 Van den Berg, Cássio: Loefgrenianthus in Genera Orchidacearum Vol.4, pp. 274-275. Oxford University Press, 2006. ISBN   978-0-19-850712-3.
  4. 1 2 3 Miller, David; Richard Warren; Izabel Moura Miller & Helmut Seehawer: Serra dos Órgãos sua história e suas orquídeas, p. 241-242. Rio de Janeiro, 2006.
  5. 1 2 3 Withner, Carl Leslie: The Cattleyas and Their Relatives, Vol. 3, pp. 98–100. Timber Press, Oregon. ISBN   0-88192-269-2
  6. Oakes Ames: The rediscovery of a lost orchid in Orchids in retrospect (1948)
  7. Loefgren, Johan Albert Constantin: Novos subsídios para a flora Orchidaceae do Brasil in Arquivos do Jardim Botânico do Rio de Janeiro Vol.2: p. 58. Rio de Janeiro, 1918.
  8. Hoehne, Frederico Carlos: Loefgrenianthus blanche-amesiae in Boletim do Instituto Brasileiro de Sciencias vol.2: 352. São Paulo, 1927.
  9. Van den Berg, Cássio et al: A Phylogenetic analysis of Laellinae based on sequence data from internal transcribed spacers of nuclear ribosomal DNA in Lindleyana vol.15-2, pp. 96–114, 2000. Published on Internet [ permanent dead link ].