Microloma

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Microloma
Microloma tenuifolium IMG 2284c.jpg
Microloma tenuifolium inflorescence
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Gentianales
Family: Apocynaceae
Subfamily: Asclepiadoideae
Tribe: Asclepiadeae
Genus: Microloma
R.Br. [1]

Microloma is a small genus of Ceropegia -like twiners and twiggy bushes occurring in mainly arid or fynbos regions in South Africa. They are generally nondescript when not in bloom, but the flowers of most species are incongruously decorative.

Contents

Overview

Microloma R. Br. in Mem. Werner. Soc.1: 53, (1809), is a genus of herbaceous perennial, dicotyledonous plants . Microloma species were originally described as members of the genus Ceropegia, in the family Asclepiadaceae, but Brown separated them and created the new genus, still in the family Asclepiadaceae. [1] More recently the Asclepiadaceae have been re-classified as the subfamily Asclepiadoideae of the dogbane family Apocynaceae.

Microloma tenuifolium growing in a tangle without support where fire had removed fynbos scrub a year earlier. Usually the stems would be twining around the branches of perennials. Microloma tenuifolium IMG 2283s.jpg
Microloma tenuifolium growing in a tangle without support where fire had removed fynbos scrub a year earlier. Usually the stems would be twining around the branches of perennials.
Microloma calycinum, a species from an arid region Microloma calycinum PICT2490.JPG
Microloma calycinum, a species from an arid region
Microloma sagittatum in flower, twining in mixed fynbos thicket Microloma sagittatum (L.) R. Br. Flower IMG 2927.JPG
Microloma sagittatum in flower, twining in mixed fynbos thicket

Common names of Microloma species are various and regional; Manning mentions "wax creeper" and "melktou" (literally "milk-string", a curious name because the plants do not in general produce latex). [2] Other names include "wax twiner" and "bokhorinkies" (literally "little goat- or antelope-horns, a reference to the shape of the fruit). Marloth said: "The Dutch name is suikerkannetje, as the flower produces so much nectar that in the morning one may shake out a drop of it from each flower." [3] "Suikerkannetje" means little "sugar-can". Marloth adds:"In spite of this proffered feast, visitors are rare and one must have much patience if one wants to know who the visitors are that respond to the invitation — they are small moths and tiny butterflies like the Lycaena or still smaller kinds." More recent work however has shown that such insects are incidental visitors; the main pollinators are sunbirds; the pollinia stick to their tongues in a striking example of specialised mutualism. [2]

Microlomas are perennials. Some are delicate twiners and some are shrublets; Microloma massonii (now = Microloma armatum) is so densely branched, with the branches so spiny at their tips, that the colloquial name is "ystervarkbossie", meaning "porcupine bush". [4] Unlike many of the Asclepiadoideae Microlomas have clear sap without any conspicuous latex. Their leaves are opposite, usually sessile and simple. [2] The inflorescences are umbel-like cymes, borne outside the axils. The flowers usually are red or reddish, sometimes yellow, orange or pink. There are five sepals, with the corolla usually longer than the calyx. The five petals are usually glossily waxy, consistently with some of the common names. The corolla tube is usually pentagonal and urn-shaped or oblong, with tufts of downward-pointing hairs low down in the tube opposite the lobes. The petals are arranged spirally and practically close the tube. The stamens arise from the base of the corolla. The anthers generally are sagittate at their bases, and bear pollinia. [5]

Most species grow a fascicle of fleshy roots around the base of the stem and thus may shed shoots and leaves in dry seasons or when fires pass over. [3]

Traditional uses

An infusion of the fleshy root fascicle of Microloma saggittatum has been used in traditional medicine for relief of griping pains in the abdomen. The infusion is red in colour. If water is unavailable the patient may chew a piece of the root instead. [6]

Country children would suck the very sweet nectar from the flower clusters of some species. This was rather as a treat or a whim than as a serious contribution to their nutrition, because the plants are small and not usually plentiful.

Species [7]
  1. Microloma burchellii N.E.Br. - South Africa
  2. Microloma calycinum E.Mey. - near Goedemanskraal in Western Cape Province
  3. Microloma gibbosum N.E.Br. - South Africa
  4. Microloma glabratum E.Mey. - Western Cape Province
  5. Microloma hereroense Wanntorp - Namibia
  6. Microloma incanum Decne.- South Africa
  7. Microloma longitubum Schltr. - Namibia
  8. Microloma namaquense H.Bol. - Namibia, Western Cape Province
  9. Microloma penicillatum Schltr. - Damaraland in Namibia
  10. Microloma poicilanthum Huber - Damaraland in Namibia
  11. Microloma sagittatum (L.) R.Br. - South Africa
  12. Microloma tenuifolium (L.) K.Schum. - South Africa
formerly included [7]

Related Research Articles

<span class="mw-page-title-main">Asclepiadoideae</span> Subfamily of plants

The Asclepiadoideae are a subfamily of plants in the family Apocynaceae. Formerly, they were treated as a separate family under the name Asclepiadaceae, e.g. by APG II, and known as the milkweed family.

<i>Ceropegia</i> Genus of plants

Ceropegia is a genus of plants within the family Apocynaceae, native to Africa, southern Asia, and Australia. It was named by Carl Linnaeus, who first described this genus in his Genera plantarum, which appeared in 1737. Linnaeus referred to the description and picture of a plant in the Horti Malabarici as the plant for which the genus was created. In 1753 he named this species as Ceropegia candelabrum. Linnaeus did not explain the etymology but later explanations stated that the name Ceropegia was from the Greek word keropegion κηροπηγɩον. This means candelabrum in Latin, which has a broader range than the modern word - "a candlestick, a branched candlestick, a chandelier, candelabrum, or also lamp-stand, light-stand, sometimes of exquisite workmanship".

<span class="mw-page-title-main">Stapeliinae</span> Subtribe of flowering plants

Stapeliinae is a subtribe of flowering plants within the tribe Ceropegieae of the subfamily Asclepiadoideae of the family Apocynaceae. The subtribe comprises about 35 genera, including both the stem-succulent "stapeliads" and the horticulturally popular genera Brachystelma and Ceropegia. The largest number of genera are native to Africa, but a more limited number of genera are widespread in Arabia and Asia. Historically, a similarly circumscribed taxon was treated as a separate tribe, Stapelieae.

<i>Stapelia</i> Genus of plants

Stapelia is a genus of low-growing, spineless, stem succulent plants, predominantly from South Africa with a few from other parts of Africa. Several Asian and Latin American species were formerly included but they have all now been transferred to other genera. The flowers of certain species, most notably Stapelia gigantea, can reach 41 cm (16 inches) in diameter when fully open. Most Stapelia flowers are visibly hairy and generate the odor of rotten flesh when they bloom.

<i>Huernia</i> Genus of flowering plants

The genus Huernia consists of perennial, stem succulents from Eastern and Southern Africa and Arabia, first described as a genus in 1810.

<i>Cynanchum</i> Genus of flowering plants in the dogbane family Apocynaceae

Cynanchum is a genus of about 300 species including some swallowworts, belonging to the family Apocynaceae. The taxon name comes from Greek kynos and anchein, hence the common name for several species is dog-strangling vine. Most species are non-succulent climbers or twiners. There is some evidence of toxicity.

<i>Ceropegia stapeliiformis</i> Species of plant

Ceropegia stapeliiformis is a flowering plant in the genus Ceropegia (Apocynaceae), native to South Africa and Eswatini. Common names include serpent ceropegia, snake creeper, and slangkambro.

<i>Duvalia</i> Genus of plants

Duvalia is a succulent plant genus in the subfamily Asclepiadoideae, in the family Apocynaceae (dogbane).

Dischidia is a genus of plants in the “dog-bane” family Apocynaceae, collectively known as the “milkweeds”. They are epiphytes, native to tropical areas of China, India as well as Bhutan’s southern borders, wherever minimal frost occurs. Additionally, they are known from most areas of Mainland Southeast Asia, including forested areas of Myanmar, Thailand, Vietnam, Cambodia, Laos, and some parts of Indonesia, Malaysia and Singapore. Several species are also native to Papua New Guinea and northeastern Australia.

<i>Anacampseros</i> Genus of plants

AnacampserosL. is a genus comprising about a hundred species of small perennial succulent plants native to Southern Africa, Ethiopia and Latin America. The botanical name Anacampseros is an ancient one for herbs supposed to restore lost love.

<i>Fockea</i> Genus of flowering plants

Fockea is a genus of succulent scrubs native to Africa south of the equator. They are members of the Asclepiadoideae (milkweeds), a subfamily of the dogbane family Apocynaceae. Of the six recognized species, only the two most widely distributed extend north of southern Africa, with F. multiflora reaching as far north as Tanzania and F. angustifolia reaching to southern Kenya. Fockea are known as water roots, a reference to the bulbous caudex characteristic of most species, which is also edible in at least some species.

Ceropegia striata is a plant species endemic to Madagascar. It is known only from the Vavavato Massif in the central highlands, at an elevation of approximately 1800 m.

<i>Philibertia</i> Genus of flowering plants

Philibertia is a genus of flowering plants in the family Apocynaceae, first described as a genus in 1819. It is native to South America.

<i>Pachycarpus</i> Genus of flowering plants

Pachycarpus is a genus of plants in the family Apocynaceae, first described in 1838. It is native to Africa.

<i>Raphionacme</i> Genus of flowering plants

Raphionacme is a plant genus in the family Apocynaceae, first described as a genus in 1842. The genus is found primarily in Africa, with one species on the Arabian Peninsula.

<i>Ceropegia candelabrum</i> Species of plant

Ceropegia candelabrum is the type species in its genus of plants, belonging the subfamily Asclepiadoideae. The Latin specific epithet candelabrum is derived from the candelabra-like appearance of the inflorescences.

References

  1. 1 2 Brown, Robert; The Miscellaneous Botanical Works of Robert Brown Vol. II.; Published for the Ray Society 1867.
  2. 1 2 3 Manning, John (2008). Field Guide to Fynbos. Cape Town: Struik Publishers. ISBN   978-1-77007-265-7.
  3. 1 2 Marloth, Rudolf. “The Flora of South Africa” 1932 Pub. Cape Town: Darter Bros. London: Wheldon & Wesley.
  4. Hobson, Nigel (1975). Veld Plants of Southern Africa. Johannesburg: Macmillan South Africa. ISBN   0-86954-013-0.
  5. Dyer, R. Allen, “The Genera of Southern African Flowering Plants”. ISBN   0-621-02854-1, 1975
  6. Watt, John Mitchell; Breyer-Brandwijk, Maria Gerdina: The Medicinal and Poisonous Plants of Southern and Eastern Africa 2nd ed Pub. E & S Livingstone 1962
  7. 1 2 The Plant List, genus Microloma