Otholobium accrescens | |
---|---|
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Rosids |
Order: | Fabales |
Family: | Fabaceae |
Subfamily: | Faboideae |
Genus: | Otholobium |
Species: | O. accrescens |
Binomial name | |
Otholobium accrescens | |
Otholobium accrescens is an upright, largely herbaceous subshrub assigned to the Pea family. It has up to three stems that carry upright branches in leaf axils near the ground, and have alternately set inverted egg-shaped leaves and lax heads consisting of 12-21 pea-like flowers on long peduncles in the axils of the lower leaves. It differs from most other Otholobium species by the calyx that continues to grow after flowering and the leaf that consists of just one leaflet. It is an endemic of the Eastern Cape province of South Africa near Loerie. It probably flowers August to January. [1] [2]
Specimens of the species have been collected since 1947. Charles Stirton and A. Muthama Muasya considered it sufficiently different from its relatives, described it in 2017, and called it Otholobium accrescens. The name of the genus Otholobium is a combination of the Greek words ὠθέω (ōthéō) meaning to push and λοβός (lobos) meaning pod, which Stirton selected because its fruit seems to be pushed out of the calyx. [3] The species name accrēscēns is Latin, means growing or increasing, and refers to the characteristic that the calyx continues to grow after flowering. [2]
Otholobium accrescens is a small, upright, largely herbaceous subshrub of up 10–60 cm (3.9–23.6 in) high, that resprouts from the underground rootstock, after a fire destroyed the above ground biomass, by growing up to 3 stems at an interval from one another. These stems carry upright branches in the axils of the lower leaves. At the base of the alternately set leaves are two, spreading or back curving stipules of 4–5 mm (0.16–0.20 in) long and 1–2.5 mm (0.039–0.098 in) wide that are slightly club-shaped lower down the stem and line- to awl-shaped higher up, hairless but set with dot-like glands. In contrast to most Otholobium species, the leaf only consists of one leaflet. The ancestral clover-like leaf can still be deduced from the fact that the petiole of 5–8 mm (0.20–0.31 in) long is topped by a petiolule of about 1 mm (0.039 in) long that can be shed separately. It in turn carries the single leaflet that can also be shed separately. The first leaflets to appear are smaller than those higher up the stem. The hairless leaflets are broadly elliptic to broadly inverted egg-shaped, 2.5–4 cm (0.98–1.57 in) long and 1.5–2.5 cm (0.59–0.98 in) wide, with a wedge-shaped base, a round top, but the central veins is very slightly elongated, sharp, hook-shaped. The leaflet has a smooth margin, and veins clearly visible on both surfaces. Dried leaflets are densely set with black dot-like glands, more so on the upper surface. [2]
The open inflorescences emerge on 70–110 mm (2.8–4.3 in) long peduncles (4–5 times longer than the subtending leaf) from the axils of the lower leaves. The inflorescences themselves are 35–55 mm (1.4–2.2 in) long, and carry between 4–7 clusters of three flowers each that are borne on approximately 2 mm (0.079 in) long pedicels. Each flower cluster is subtended by a broadly oval, papery bract, that carries few hairs and is not shed. The flowers are about 10 mm (0.39 in) long, and are each subtended by a small, needle-shaped, persistent bract. The calyx is merged in a funnel-shaped tube of 3–3.3 mm (0.12–0.13 in) long but ends in five equally long teeth of about 10 mm long with a pointy tip. The tooth at the bottom of the flower is slightly broader at about 3 mm (0.12 in) wide. The four other teeth are lance-shaped, with the edges approximately parallel towards the tube and both lobes at the upside of the flower are fused further than rest. The calyx has a netted pattern of veins, equally sized and equally distributed dot-like glands, and a row of blackish hairs along the edge. The calyx continues to grow after flowering. As in most Faboideae, the corolla is zygomorphic, forms a specialized structure and consists of 5 free petals, of at the moment unknown colour because the species was described from dried specimens, the colour has not been documented when it was collected, and no flowering plants have been observed in the field so far. The upper petal, called the banner or standard is broadly elliptic, approximately 11 mm (0.43 in) long and 3 mm (0.12 in) wide, with a wider part at the top called the blade narrowing down to 2 lobes facing the base, and extending down between the lobes into a narrow part called claw of about 2 mm (0.079 in) long. The two side petals called wings are 2.5 mm (0.098 in) long and 1.1 mm (0.043 in) wide, curve upwards, and overlap the keel. The blade of the wing is adorned with about 35 irregular ridges in indistinct rows and has one lobe or auricle facing the base. The claw of the wing is about 3 mm (0.12 in) long. The 2 keel petals stick together along their base and are about 8 mm (0.31 in) long and 4–4.5 mm (0.16–0.18 in) wide, with the keel claw about 4.5 mm (0.18 in) long. The keel envelops a hollow, open tube of about 8 mm (0.31 in) long, made up of 9 merged filaments and 1 free stamen, all of them equally long. Largely hidden in this androecium is a 7–8 mm (0.28–0.31 in) long pistil, including at its base the ovary of about 2.5 mm (0.098 in) long that is adorned with adpressed black hairs and many glands. At the tip the ovary extends into a forward sloping style that is thickened at the place where it curves upwards about 2–3 mm from its end. The pistil it topped by a small stigma. The pistil later develops into the densely glandular, 8 mm (0.31 in) and 6.5 mm (0.26 in) thick pod. The single seed is about 5 mm (0.20 in) long and 4 mm (0.16 in) wide, dark brown in colour, with the area where it was attached, the hilum, protruding. [2]
Otholobium accrescens differs from O. afrum and O. fumeum , which are shrubs of up to 1.5 m (4 ft 11 in) high (not a plant of 10 to 60 cm, only woody at the base), with clover-like leaves consisting of 3 flat leaflets (not with only one leaflet), and sepals shorter than the petals (not equally long sepals and petals). [2]
Otholobium accrescens is known from only two locations. Nonetheless, it is considered a near-threatened species that is likely more common because it is easily overlooked and is probably only noticed in the months after a fire. [4] It occurs near the Groendal and Otterford Forest Reserves, in the Eastern Cape province of South Africa. Specimens of this species may live for over 50 years and the plants resproute from the underground rootstock after fire has destroyed the biomass above the ground. It grows in a vegetation type called mountain fynbos at an elevation of 550–650 m (1,800–2,130 ft). Flowers may be found from August to January. It produces few seeds and probably primarily propagates through its rootstocks. [2]
Campanula latifolia, the giant bellflower, is a species of bellflower in the family Campanulaceae. It is also known as the large campanula and the wide-leaved bellflower. It is native to Europe and western Asia and is widely grown as an ornamental plant.
Otholobium is a genus of flowering plants in the pea family with over 50 named species, but several also remain undescribed so far. Species may be herbaceous perennials, subshrubs, shrubs or small trees. The alternately set leaves are accompanied by stipules and mostly consist of three leaflets, sometimes just one. The inflorescences are on short or long stalks in the axils of the leaves. Within the inflorescences, the pea-like flowers occur in groups of three, rarely of two, subtended by a bract, and each individual flower also is subtended by a narrow bract. The petals may be white, pink, purple or blue, often with a differently colored nectar guide, that may sometimes even be yellow. The seedpods contain just one, black, dark or light brown seed. Most species are restricted to the Cape provinces of South Africa, but some occur at higher elevations in eastern Africa. Charles Stirton erected the genus in 1981. The species in South America will probably be segregated, because these are not sufficiently related to the African species.
This page provides a glossary of plant morphology. Botanists and other biologists who study plant morphology use a number of different terms to classify and identify plant organs and parts that can be observed using no more than a handheld magnifying lens. This page provides help in understanding the numerous other pages describing plants by their various taxa. The accompanying page—Plant morphology—provides an overview of the science of the external form of plants. There is also an alphabetical list: Glossary of botanical terms. In contrast, this page deals with botanical terms in a systematic manner, with some illustrations, and organized by plant anatomy and function in plant physiology.
Roscoea tumjensis is a perennial herbaceous plant occurring in the Himalayas, in Nepal. Most members of the ginger family (Zingiberaceae), to which it belongs, are tropical, but R. tumjensis, like other species of Roscoea, grows in much colder mountainous regions.
Eremophila accrescens is a plant in the figwort family, Scrophulariaceae and is endemic to Western Australia where it usually grows in rocky places or near drainage channels. It is an erect shrub with greyish, slightly furry, variably-shaped leaves and white to pale blue or purple petals.
Leucospermum saxosum is an upright evergreen shrub of up to 2 m (6.6 ft) high that is assigned to the family Proteaceae. It has lance-shaped, leathery leaves and egg-shaped flower heads of about 5 cm (2.0 in) in diameter, with initially yellow-orange flowers, later turning crimson, from which long styles stick out, giving the flower head the appearance of a pincushion. It is called escarpment pincushion in English. It grows on quartzite soils in the mountains on the Zimbabwe-Mozambique border and in eastern Transvaal.
Leionema ceratogynum is a dense shrub, it grows on the south coast of New South Wales, Australia. It has oval-elliptic shaped leaves, scented foliage and lemon flowers usually in groups of three arising from the leaf axils.
Struthiola striata is a rounded, heather-like shrub of up to 1.5 m (4.9 ft) high that is assigned to the Thymelaeaceae family. It has small assending leaves on long straight branches, with cream, soft yellow or pinkish flowers in spikes, each of which consist of a tube of about 1 cm (0.39 in) long with 4 oval sepal lobes and 4 yellow alternating petal-like scales. It is sometimes called ribbed capespray or featherhead in English and roemenaggie, katstertjie or veërtjie in Afrikaans. It grows on coastal flats and foothills in the Western Cape province of South Africa.
Otholobium swartbergense is a small spreading shrub assigned to the Pea family. All green parts are covered in hairs. It has many slender stems that are woody at their base, alternately set clover-like leaves and heads consisting of 6-15 mauve to purple, pea-like flowers on long peduncles in the axils of the leaves. This species is an endemic of the Swartberg mountains in the Western Cape province of South Africa. It mostly flowers in November and December.
Otholobium curtisiae is a small spreading shrub assigned to the Pea family. All green parts are covered in hairs and urn-like glands. It has many woody stems, small and somewhat succulent, dark green alternately set clover-like leaves and heads consisting of 3-9 white, pea-like flowers on very short peduncles in the axils of the leaves. This species is an endemic of the Overberg area in the Western Cape province of South Africa. It mostly flowers in August and September.
Otholobium dreweae is an upright shrublet assigned to the Pea family of about 15 cm (5.9 in) high, that appears after the vegetation burned down from the underground rootstock and forms mat-like clumps of hardly branching, leafy stems. The stems are set with stiff, entire, alternate leaves with a single leaflet and heads consisting of 12-18 initially dark pink, later white, pea-like flowers with a white nectar guide on a peduncle as long as the leaves at the end of the stem. This species is an endemic of the Kleinrivier Mountains in the Western Cape province of South Africa. It mostly flowers in November.
Otholobium nitens is an upright, densely branched shrub of up to 1.5 m high that is assigned to the Pea family. It has one to many initially softly hairy stems, alternately set, clover-like, upright leaves crowding the new shoots, and heads consisting of 3 pea-like, dark purple to mauve flowers on short peduncles in the axils of the leaves on short side-shoots. This species is an endemic of the mountains between Ceres and Hottentots Holland in the Western Cape province of South Africa. It mostly flowers between October and late December.
Prostanthera megacalyx is a species of flowering plant in the family Lamiaceae and is endemic to Queensland. It is a small shrub with pale green leaves and mauve flowers.
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.
Otholobium spissum is a dense, tangled, much branched shrub of up to 185 cm (73 in) high that is assigned to the Pea family. It has dull green, clover-like leaves and white, pea-like flowers with a streaky, triangular, purple nectar guide. The species grows in renosterveld in the central mountains of the Western Cape province of South Africa. This species flowers in July and August.
Otholobium lanceolatum is a small subshrub of up to 20 cm (7.9 in) high, that is assigned to the Pea family. It has up to 7 horizontal stems with raised tips, few hairless, alternately set leaves with only one leaflet and clusters of 15-27 white, pea-like flowers with a purple tip near the top of the short, seasonal shoots. It is endemic to one site near Caledon, South Africa. Flowers only appear in November and December within one year after a fire destroyed the vegetation.
Otholobium lucens is a shrub of up to 60 cm (24 in) high that is assigned to the pea family. It has alternately set clover-like leaves crowding on the new growth, while older parts have lost their leaves. The white, pea-like flowers occur with 3 or 6 together in the leaf axils. This rare species is an endemic of the Swartberg mountains in the Western Cape province of South Africa. It flowers between July and February.
Psoralea pilifera, synonym Otholobium piliferum, is a small, softly hairy shrublet of up to 30 cm (12 in) high that has been assigned to the Pea family, with branches horizontal at the base with rising tips. It regrows from the underground rootstock after fire destroys the vegetation. It has clover-like leaves on short stalks and white, pea-like flowers flushed with mauve that grow in triplets in the axils of the upper leaves of the new shoots. The species is only known from near Makhanda, Eastern Cape province of South Africa. Flowers have been seen in September and January. This is a very rare species about which little is known and which is likely threatened with extinction.
Leionema westonii is a flowering plant in the family Rutaceae and is endemic to New South Wales. It has white flowers borne in upper leaf axils.
Micromyrtus littoralis is a species of flowering plant in the myrtle family, Myrtaceae and is endemic to south-eastern Queensland. It is a shrub with small, overlapping egg-shaped to lance-shaped leaves, and small white flowers arranged singly in leaf axils with 5 stamens in each flower.