| Hypericum humboldtianum | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Malpighiales |
| Family: | Hypericaceae |
| Genus: | Hypericum |
| Section: | H. sect. Brathys |
| Subsection: | H. subsect. Phellotes |
| Species: | H. humboldtianum |
| Binomial name | |
| Hypericum humboldtianum Steud. 1840 | |
| Synonyms [1] | |
Hypericum humboldtianum is a species of shrubby flowering plant in the St. John's wort family Hypericaceae native to Colombia and Venezuela.
The closest relative of Hypericum humboldtianum is Hypericum callacallanum in Peru, which has three-nerved sessile leaves and larger flowers. [2]
Hypericum humboldtianum grows 10–75 cm (3.9–29.5 in) tall, with pseudo-dichotomous, divergent or lateral branches. The orange to brown four-lined stems are ancipitous when young and become terete, with their cortex exfoliating in strips. The internodes are 2.5–14 mm (0.098–0.551 in). The sessile or shortly pseudopetiolate leaves are spreading and deciduous, with pseudopetioles 0.5 mm (0.020 in) long. The oblong or oblanceolate leaves are 6–13 mm (0.24–0.51 in) long and 1.2–3 mm (0.047–0.118 in) wide, and are planar or incurved with a prominent midrib. The glaucous and coriaceous leaves have an acute to obtuse apex, a narrow base, and a sheathing pseudopetiole. Leaves have a single basal vein with or without lateral branches, and lack tertiary reticulation. The laminar glands are dense. The inflorescence is one to twelve flowered, branching dichasially or pseudo-dichotomously, with peduncles and pedicels 3–4 mm (0.12–0.16 in) long. The star-shaped flowers are 15 mm (0.59 in) wide. The elliptic to oblanceolate sepals are 14.6–16.5 mm (0.57–0.65 in) long and 1.3–2.2 mm (0.051–0.087 in) wide, with three to five veins and a midrib not prominent. The glands of the sepals are linear below, becoming punctiform in the upper third to upper half. The bright yellow, obovate petals are 6–8 mm (0.24–0.31 in) long and 3–5.5 mm (0.12–0.22 in) wide, with linear glands becoming punctiform distally. The thirty to fifty stamens are 5.5 mm (0.22 in) long at the most. The ovoid to cylindric ovary is 1.5–2 mm (0.059–0.079 in) long and 1 mm (0.039 in) wide. The three styles are about 2–3 mm (0.079–0.118 in) long. The stigmas are capitate. The cylindric-ellipsoid capsule is 4–6.5 mm (0.16–0.26 in) long and 2–3 mm (0.079–0.118 in) wide, equalling the sepals. The seeds are 0.5–0.6 mm (0.020–0.024 in) long and lack carinas. [2]
Hypericum humboldtianum grows in thickets and on slopes of páramo at altitudes between 2,500–3,500 m (8,200–11,500 ft). In Colombia the shrub grows from Valle del Cauca to Norte de Santander and in Venezuela it grows in Mérida. [2]
Echinodorus trialatus is a type of plant. In Rataj's taxonomy, E. trialatus is in Section Paniculati, Subgenus Echinodorus.
Nepenthes naga is a tropical pitcher plant endemic to the Barisan Mountains of Sumatra. It is characterised by a forked sub-apical appendage on the underside of the lid and an undulate lid margin. The specific epithet naga is the Indonesian word for "dragon" and refers to the distinctive lid appendage of this species as well as the large size of its pitchers. The name also references local folklore, which tells of dragons occurring in this species's habitat in the past.
Hypericum mutilum is a species of St. John's wort known by the common name dwarf St. John's wort. It is native to parts of North America and is present in other parts as an introduced species. It is an annual or perennial herb taking a multibranched erect form up to about 60 centimeters tall. The oval green leaves are one or two centimeters long and are covered in tiny glands. The inflorescence is a compound cyme of tiny flowers. H. mutilum subsp. mutilum and subsp. boreale have a diploid number of 16, and H. mutilum subsp. boreale can have a diploid number of 18.
Hypericum terrae-firmae is a woody perennial flowering plant in the St. John's wort family Hypericaceae. It is an endemic plant species of Belize.
Hypericum acmosepalum is a dwarf shrub in Hypericumsect. Ascyreia that is native to China and known as jian e jin si tao locally.
Hypericum annulatum is a species of flowering plant in the family Hypericaceae. It is a perennial herb of varying heights which grows upright, with more than a hundred flowers of a golden yellow color. First described in 1827, the species has a wide distribution from Eastern Europe to East Africa, and its appearance can vary greatly based on its geographic location. It has been used in Bulgarian folk medicine, and has more recently been investigated for its effectiveness in slowing the growth of or killing certain types of human cancer.
Hypericum punctatum, the spotted St. John's wort, is a perennial herb native to North America. The yellow-flowered herb occurs throughout eastern North America into southern Canada. The process of microsporogenesis carried out by this plant is prone to errors in chromosomal segregation. It has a diploid number of 14 or 16. Insects are attracted to the plant's pollen and the hypericin in the plant's leaves is toxic to mammals.
Hypericum cuisinii is a perennial herb in the genus Hypericum, in the section Adenosepalum. The herb has pale yellow flowers and occurs in Greece and Turkey.
Hypericum undulatum, the wavy St Johns Wort, is a herbaceous perennial flowering plant native to western Europe and northern Africa. The specific name undulatum is Latin, meaning "wavy" or "undulated", referring, just as the common name, to the wavy leaf margins of the herb. The plant has a diploid number of 16 or 32.
Hypericum edisonianum, known as Arcadian St. John's wort, Edison's St. John's wort, and Edison ascyrum, is a species of flowering plant in the St. John's wort family, Hypericaceae. It is endemic to Florida.
Hypericum phellos is a species of shrub or small tree in Hypericumsect. Brathys. The species is found in Colombia and Venezuela on scrubby slopes and moist woods.
Hypericum denticulatum, the coppery St. John's Wort, is a perennial herb in the flowering plant family Hypericaceae. It is native to the Eastern United States. The species has two varieties, H. denticulatum var. recognitum and H. denticulatum var. acutifolium. The herb has a diploid number of 24 or 48.
Hypericum majus, the greater Canadian St. John's wort, is a perennial herb native to North America. The specific epithet majus means "larger". The plant has a diploid number of 16.
Hypericum formosissimum is a species of flowering plant in the family Hypericaceae, section Adenosepalum, in the Hypericum huber-morathii group.
Hypericum coris, the heath-leaved St. John's wort, also called yellow coris, is a species of flowering plant in the family Hypericaceae, and is the type species of sect. Coridium. It is a low shrub, and it is found in Switzerland and northwestern Italy. The species has been a popular garden plant since the 18th century, valued for its long flowering period and for how well it adapts to cultivation.
Hypericum harperi, the sharplobe St. Johnswort or Harper's St. John's wort, is a perennial flowering plant in the family Hypericaceae. It is an aquatic herb native to southeast North America. H. harperi has a diploid chromosome number of 24.
Hypericum vacciniifolium is a species of flowering plant in the flowering plant family Hypericaceae. It was first described by August von Hayek and Walter Siehe in the Ann. K. K. Naturhist. Hofmus. journal in 1914 from a specimen collected by Siehe in 1912.
Prostanthera rugosa is a species of flowering plant in the family Lamiaceae and is endemic to a restricted area of New South Wales. It is an openly-branched shrub with egg-shaped or narrow egg-shaped, thick, fleshy leaves and mauve flowers with a white tinge arranged in leaf axils near the ends of branchlets.
Hypericum heterophyllum is a flowering plant in the Hypericaceae family and is the only species in Hypericum sect. Heterophylla.
Hypericum elodeoides, commonly called the Himalayan St. John's Wort, is a species of flowering plant of the St. John's wort family (Hypericaceae).