| Dolichostachys | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Lamiales |
| Family: | Acanthaceae |
| Genus: | Dolichostachys Benoist |
| Species: | D. elongata |
| Binomial name | |
| Dolichostachys elongata Benoist | |
Dolichostachys is a monotypic genus of plants in the family Acanthaceae. Its sole species, Dolichostachys elongata, is a subshrub that is endemic to Madagascar. It is considered an endangered species.
The genus Dolichostachys and species Dolichostachys elongata were named and described by Raymond Benoist in 1962 based on two specimens collected by Joseph Marie Henry Alfred Perrier de la Bâthie in 1912. [2] However, as Benoist failed to designate a type specimen, neither the genus nor species names could be considered validly published under Article 40 of the International Code of Nomenclature for algae, fungi, and plants. [3] Benoist's description was verified and a type specimen was designated in a 2022 article published in the journal Taxon , with the author citation attributed to Benoist. [3]
D. elongata remains the sole species in the genus Dolichostachys. [4] [5] Morphologically, it resembles members of the genus Populina and its allies in the subtribe Tetrameriinae, but can be differentiated by the length of its flower, the broad upper lip of the flower, and its elongate leaves when mature. It is unplaced within the tribe Justicieae, possibly belonging to either subtribe Isoglossinae or subtribe Tetrameriinae. [3]
Dolichostachys elongata is known only from the Analanjirofo and Atsimo-Atsinanana regions of Madagascar. In Analanjirofo it can be found near Mananara Nord and Fenerive Est, and in Atsimo-Atsinanana it can be found near Manombo. It grows near rivers in humid forests at elevations from sea level up to 200 m (660 ft) above sea level. [1]
Dolichostachys elongata is an erect subshrub growing up to 1 m (3 ft 3 in) tall. [1] The branches are quadrangular and slightly hairy. The leaves are linear to lanceolate and pointed at both the tip and the base, each measuring approximately 7–15 cm (2.8–5.9 in) long and 10–22 mm (0.39–0.87 in) wide. The leaves are hairless, arranged opposite one another, and borne on 10–18 mm (0.39–0.71 in) long petioles. The inflorescence is a bracteolate spike. The bracts are lanceolate, measuring approximately 4 mm (0.16 in) long and 1 mm (0.039 in) wide, while the bracteoles are linear and measure only 1 mm (0.039 in) long. Both the bracts and bracteoles are hairy. The five sepals are of roughly equal size, pointed in shape, and hairy. The corolla is a short, fused tube, with the tube measuring approximately 4.5 mm (0.18 in) long and the corolla as a whole measuring 10 mm (0.39 in) long. [2] The upper lip of the corolla is shaped like a broad oval with a rounded or slightly notched tip, [3] while the lower lip of the corolla is split into three lobes. [2]
Dolichostachys elongata is listed as endangered by the International Union for the Conservation of Nature under criteria B1ab(i,ii,iii,iv) and B2ab(i,ii,iii,iv), based on its small extent and area of occupancy and the expected decline of its population and habitat. It is primarily threatened by habitat loss resulting from logging, slash and burn agriculture, and other forms of deforestation. Some plants can be found within the Manombo Special Reserve, however, plants outside of this protected area are particularly threatened by habitat degradation, and the species is not known to be conserved ex situ . [1]
Pachypodium ambongense is a species of plant in the family Apocynaceae. It was first published as a species of the genus Pachypodium in 1924 by the botanist Henri Louis Poisson.
Pachypodium brevicaule is a species of plant that belongs to the family Apocynaceae.
Hovea linearis is a species of flowering plant in the family Fabaceae and is endemic to eastern Australia. It is an erect or trailing subshrub with mostly narrowly linear to linear leaves with stipules at the base, and mauve and yellowish-green, pea-like flowers.
Stemodia durantifolia is a species of flowering plant in the plantain family commonly known as the whitewoolly twintip and purple stemodia. Stemodia durantifolia is native to the Americas, including Chile, Mexico, Texas, and the deserts of California and Arizona, and is often found in riparian habitats, preferring wet sand and rocks. It is a perennial herb producing a hairy, glandular, erect stem 10–100 cm (3.9–39.4 in) tall, with the toothed lance-shaped leaves found in pairs or triplets, attached to the stem with clasping bases. The inflorescence is a raceme of violet flowers, with each corolla held in a calyx of hairy, pointed sepals, and can often be found in bloom year-round. Although globally at low risk of extinction, Stemodia durantifolia is imperiled in California due to its rarity and threats from development.
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Schizolaena elongata is a tree in the family Sarcolaenaceae. It is endemic to Madagascar.
Schizolaena cauliflora is a tree in the family Sarcolaenaceae. It is endemic to Madagascar. The specific epithet cauliflora means 'stem-flowered', referring to the flowers being directly attached to the stem.
Schizolaena exinvolucrata is a tree in the family Sarcolaenaceae. It is endemic to Madagascar.
Schizolaena manomboensis is a tree in the family Sarcolaenaceae. It is endemic to Madagascar. The specific epithet refers to Manombo Reserve where the species is found.
Eremolaena rotundifolia is a plant in the family Sarcolaenaceae. It is endemic to Madagascar. The specific epithet rotundifolia means 'round leaves'.
Cycnium tubulosum, also known as the vlei ink-flower and the tissue paper flower, is a slender hemiparasitic perennial plant of the broomrape family. Its range includes much of southern and eastern Africa, from South Africa to Ethiopia, including Madagascar. It has creeping, straggling or upright stems, with few narrow, entire leaves and erect, white or pinkish, slightly zygomorph flowers on a long tube, with five lobes, reminiscent of a Phlox-flower. It may not always be fully dependent on the supply of minerals by other plants, but usually makes connections with the roots of grasses. It can be found in moist, short grasslands, reaching altitudes of about 1,550 m (5,090 ft). Its conservation status in South-Africa is "least concern".
Felicia elongata is a perennial plant of up to 40 cm high that is assigned to the family Asteraceae. It has stiff, oval, opposing leaves with one distinctive vein and entire margin. The 5 cm (2 in) wide flower heads are very conspicuous in colour, white with a dark purple zone at the base of the ray florets and an orange-yellow disc. Flowering occurs from late August to September, or if the rains arrive late, sometimes October. It is a rare species that is restricted to the Saldanha Bay area. It is sometimes called Saldanha felicia or tricolour felicia in English, and driekleurblommetjie in Afrikaans.
Mini mum is a species of microhylid frog endemic to Madagascar that was described in 2019. It is the type species of its genus, Mini. The scientific name of the species refers to its size, being a pun on the word minimum: this wordplay led to the species receiving media attention when first described.
Otholobium saxosum is a small shrublet of up to 20 cm (7.9 in) high that has been assigned to the Pea family, with branches upright or horizontal at the base with rising tips. It has sessile, clover-like leaves and white, pea-like flowers that grow in triplets in the axils of the upper leaves of new, short side shoots. The species is only known from Garcia's Pass in Western Cape province of South Africa. Flowering occurs in October and November.
Goodenia rostrivalvis is a species of flowering plant in the family Goodeniaceae and is endemic to a restricted area of New South Wales. It is an ascending subshrub with egg-shaped to lance-shaped leaves with the narrower end towards the base, and thyrses or racemes of hairy yellow flowers.
Goodenia viridula is a species of flowering plant in the family Goodeniaceae and is endemic to a restricted area of Queensland. It is an erect undershrub with linear leaves and spikes of greenish-yellow flowers.
Hoffmannanthus is a monotypic genus of flowering plants in the Asteraceae. There is only one known species, Hoffmannanthus abbotianus(O.Hoffm.) H.Rob., S.C.Keeley & Skvarla Its native range is Uganda and southern Tropical Africa. It is found in the countries of Angola, Kenya, Tanzania, Uganda, Zambia and Zaïre.
Ruspolia is a genus of flowering plants belonging to the family Acanthaceae.
Stenostephanus brevistamineus is a species of flowering plant first collected 11 July 2013 in Junín, Peru. Stenostephanus is a genus in the plant family of Acanthaceae. The species holotype is housed at HOXA, with isotypes at MO and USM.
