Astroloba herrei | |
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Astroloba herrei in habitat | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Order: | Asparagales |
Family: | Asphodelaceae |
Subfamily: | Asphodeloideae |
Genus: | Astroloba |
Species: | A. herrei |
Binomial name | |
Astroloba herrei (L.) Uitewaal | |
Synonyms | |
Astroloba dodsonianaUitewaal |
Astroloba herrei is a small succulent plant of the genus Astroloba , restricted to the area around the Swartberg mountains, South Africa.
It is listed as a Vulnerable species on the Red List of the South African National Biodiversity Institute (SANBI). [1]
Astroloba herrei is a compact Astroloba species, with stems growing up to 20 cm high, that are densely covered in pointed succulent leaves. Flowers appear from June to November.
With its sharp, grey-green, keeled leaves, and its puffed up, inflated flowers, the species is easily mistaken for the closely related Astroloba spiralis species. However, it is genetically distinct and can always be distinguished by its flowers and its phyllotaxis. Both spiralis and herrei have puffed up, inflated flowers, but those of herrei are smooth (unlike spiralis, which has a wrinkled, transversely rugose, perianth). [2]
Other less reliable ways of identifying A. herrei are the fine, dark, longitudinal lines (striations) which are sometimes visible below the surface of the leaves, and the slight blueish colour which herrei attains in sheltered or shaded environments. Leaves often feature narrowly acuminate leaf tips that spread outwards more strongly than in spiralis. However these are not certain ways of identifying it.
Other than by its flowers, the only sure way of distinguishing this species is by its phyllotaxis. The divergence angle of A. herrei is much smaller than that of A. spiralis. This means that the five leaf-ranks of A. herrei will spiral in a direction counter to the direction of the generative spiral. Those of A. spiralis and A. spirella (among others) spiral in the same direction as the generative spiral. [3]
A variety of this plant was formerly recognised as a separate species, Astroloba dodsoniana (Uitewaal). The dark longitudinal stripes of this variety of herrei are faint or even invisible, and the leaves are slightly paler. This is just a growth form and it can appear at random among normal herrei plants in all herrei populations. [4]
This species has historically been considered rare, disjunct and restricted to small populations near Uniondale in the Little Karoo, and the widely separated Prince Albert in the Great Karoo. In 2017 its distribution was revised when it was found to be widespread in the more remote areas north of the Swartberg mountains. [5] [6]
The species is listed as Vulnerable – partly because it was believed to have a very restricted range, and partly because it is threatened by habitat destruction and illegal collecting. In habitat, it grows on Karoo flats, often underneath bushes which provide it with some protection from the sun. [1] [7]
Aristaloe is a genus of evergreen flowering perennial plants in the family Asphodelaceae from Southern Africa. Its sole species is Aristaloe aristata, known as guinea-fowl aloe or lace aloe.
Gasteria is a genus of succulent plants, native to South Africa and the far south-west corner of Namibia.
Astroloba rubriflora is a succulent plant found in the mountainous Karoo area around Robertson, South Africa. It is listed as a Vulnerable species on the IUCN global Red List.
Astroloba is a genus of flowering plants in the family Asphodelaceae, subfamily Asphodeloideae, native to the Cape Province of South Africa.
Tulista is a small genus of succulent plants endemic to the Cape Provinces of South Africa. They were formerly included within the genus Haworthia.
Astroloba bullulata is a small succulent plant of the Astroloba genus, endemic to mountainous areas of the southern Cape, South Africa.
Astroloba corrugata is a small succulent plant of the Astroloba genus, endemic to the Little Karoo and the far south of the Western Cape, South Africa.
Astroloba spiralis is a small succulent plant of the Astroloba genus, endemic to the southern Karoo regions of the Western and Eastern Cape Provinces, South Africa.
Astroloba congesta is a small succulent plant of the Astroloba genus, indigenous to the Eastern Cape, South Africa.
Astroloba foliolosa is a small succulent plant of the genus Astroloba widespread in the arid parts of the Eastern Cape Province, South Africa.
Kumara is a genus of two species of flowering plants in the subfamily Asphodeloideae, native to the Western Cape Province of South Africa.
Astroloba pentagona is a small succulent plant of the genus Astroloba, restricted to an area of the western section of the Little Karoo, South Africa.
Astroloba spirella is a small succulent plant of the genus Astroloba, restricted to an area of the western section of the Little Karoo, South Africa.
Astroloba robusta is a small succulent plant of the genus Astroloba indigenous to the arid southern Cape regions of South Africa. It is the most widespread Astroloba species.
Tulista pumila ("Vratjiesaalwee") is a species of Tulista succulent plant, from the Western Cape, South Africa.
Tulista kingiana is a species of succulent plant, from the Western Cape, South Africa. It is listed as Endangered on the IUCN global Red List.
Astroloba tenax is a succulent plant of the genus Astroloba, indigenous to the Western Cape Province, South Africa.
Gonialoe is a small genus of three succulent plant species—Gonialoe dinteri, Gonialoe sladeniana and Gonialoe variegata—endemic to coastal South Africa, Namibia and Angola. They were formerly included within the larger, related genus Aloe.
Aloeae is a tribe of succulent plants in the subfamily Asphodeloideae of the family Asphodelaceae, consisting of the aloes and their close relatives. The taxon may also be treated as the subfamily Alooideae by those botanists who retain the narrower circumscription of Asphodelaceae adopted prior to the APG III system. Typically, plants have rosettes of more or less succulent leaves, with or without a distinct stem. Their flowers are arranged in racemes and tend to be either small and pale, pollinated by insects, or larger and more brightly coloured, pollinated by birds. As of 2017, 11 genera are recognized, most created since 2010 by splitting off another five genera from Aloe and another two from Haworthia. Only two genera, Aloe and Aloidendron, are native outside southern Africa, extending northwards to the Arabian Peninsula. Seven genera are restricted to South Africa, some with small ranges. Members of the Aloeae are cultivated by succulent plant enthusiasts; Aloe species especially are used in temperate climates as ornamental garden plants. Some species are used in traditional medicine. Aloe vera and Aloe ferox are cultivated for their extracts, whose uses include moisturizers and emollients in cosmetics.
Haworthiopsis is a genus of succulent plants in the subfamily Asphodeloideae. The genus was previously included in Haworthia. Species in the genus are typically short perennial plants, with leaves often arranged in a rosette and frequently having raised white markings. The two-lipped flowers are borne on a tall stalk and are small – less than 17 mm (0.7 in) long – and pale in colour. Many species are cultivated as house plants or by succulent enthusiasts.