Code
RHNVI
Growth form
climber
Biological cycle
Perennial
Habitat
terrestrial
RHNVI
Growth form
climber
Biological cycle
Perennial
Habitat
terrestrial
🗒 Synonyms
| synonym | Dolichos glutinosus Roxb. |
| synonym | Dolichos tomentosus Roth |
| synonym | Glycine viscosa Roth |
| synonym | Rhynchosia grevei Drake |
| synonym | Rhynchosia sericophylla Kunze |
| synonym | Rhynchosia villosula Thwaites |
🗒 Common Names
| Comorian |
|
| Creoles and pidgins; French-based |
|
| Other |
|
📚 Overview
Description
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Global description
Rhynchosia viscosa is a creeping or climbing perennial grass covered with sticky yellow hairs. Leaves trifoliate, alternate, 5-15 cm long, oval leaflets with acuminate apex. Yellow papilionaceous flowers, grouped in stalked racemes.
General habit
Creeping or climbing plant, can reach up to 3-4 meters long. All parts are viscous.
Underground system
The plant has a deep taproot.
Stem
Solid cylindrical stem, covered with spreading hairs interspersed with long stiff hairs, yellow with glandular base.
Leaf
Trifoliate compound leaves, alternate, carried by a petiole with glandular hairs. There are two oval triangular stipules, 4 to 10 mm long at the base. The leaves measure 5 to 15 cm long. The leaflets are ovate with very asymmetrical rounded base for lateral leaflets and acute or acuminate apex. They measure 2 to 8 cm long and 2 to 7.5 cm wide. The margin is entire. Both sides are covered with long and short hairs and sparsely covered with yellow glands (especially the underside). The leaflets are very shortly stalked, but terminal leaflet is found at the end of a short rachis. They are trinervate at the base.
Inflorescence
The flowers are assembled in axillary racemes, 2-15 cm long, loose or contracted.
Flower
Papilionaceous flowers are greenish yellow or yellow with sometimes the standard striated with red, purple or crimson. They are shortly stalked. Pedicel 1 to 2 mm. The calyx,5 to 8 mm long, is covered with simple hairs and viscous hairs. It is divided up to the middle into 5 narrow lobes. The standard is also densely pubescent and glandular.
Fruit
The fruit is an oblong elliptic pod, acuminate at the top and tapered at the base, 20 to 28 mm long and 7 to 9 mm wide, pubescent and very glandular containing 1 to 2 seeds.
Seed
Seed kidney-shaped, 4.5 mm long and 3 mm wide, dark brown in color.
Rhynchosia viscosa is a creeping or climbing perennial grass covered with sticky yellow hairs. Leaves trifoliate, alternate, 5-15 cm long, oval leaflets with acuminate apex. Yellow papilionaceous flowers, grouped in stalked racemes.
General habit
Creeping or climbing plant, can reach up to 3-4 meters long. All parts are viscous.
Underground system
The plant has a deep taproot.
Stem
Solid cylindrical stem, covered with spreading hairs interspersed with long stiff hairs, yellow with glandular base.
Leaf
Trifoliate compound leaves, alternate, carried by a petiole with glandular hairs. There are two oval triangular stipules, 4 to 10 mm long at the base. The leaves measure 5 to 15 cm long. The leaflets are ovate with very asymmetrical rounded base for lateral leaflets and acute or acuminate apex. They measure 2 to 8 cm long and 2 to 7.5 cm wide. The margin is entire. Both sides are covered with long and short hairs and sparsely covered with yellow glands (especially the underside). The leaflets are very shortly stalked, but terminal leaflet is found at the end of a short rachis. They are trinervate at the base.
Inflorescence
The flowers are assembled in axillary racemes, 2-15 cm long, loose or contracted.
Flower
Papilionaceous flowers are greenish yellow or yellow with sometimes the standard striated with red, purple or crimson. They are shortly stalked. Pedicel 1 to 2 mm. The calyx,5 to 8 mm long, is covered with simple hairs and viscous hairs. It is divided up to the middle into 5 narrow lobes. The standard is also densely pubescent and glandular.
Fruit
The fruit is an oblong elliptic pod, acuminate at the top and tapered at the base, 20 to 28 mm long and 7 to 9 mm wide, pubescent and very glandular containing 1 to 2 seeds.
Seed
Seed kidney-shaped, 4.5 mm long and 3 mm wide, dark brown in color.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
No Data
📚 Nomenclature and Classification
No Data
📚 Natural History
Life Cycle
Life cycle
Perenial
There is content in another language. Please click here to read it. (Français)
Mayotte: Rhynchosia viscosa flowers from May to October and fruits from June to November.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
Reproduction
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Rhynchosia viscosa is a perennial species, propagated by seed.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
Morphology
Growth form
Liana
Liana climbing structure
Liana without tendril
Leaf arrangement
Alternate
Leaf type
Compound
Type of prefoliation
Broad leaves
Compound leaf type
Trifoliate leaf
Latex
Without latex
Stem section
Round
Root type
Taproot
Hollow or solid stem
Solid stem
Stipule type
Lanceolate stipule
Leaf attachment type
with petiole
Fruit type
Pod
Pod type
Compressed pod in section
Lamina base
acute
Lamina margin
ciliate
entire
Lamina apex
apiculate
obtuse
Upperface pilosity
Dense hairy
Upperface hair type
Pubescent
Long
Glands
Lowerface pilosity
Dense hairy
Lowerface hair type
Long
Glands
Lamina section
embossed
Lamina Veination
3 opposite at the basis
Flower color
Yellow
Inflorescence type
Raceme
Stem pilosity
Dense hairy
Stem hair type
Short and long hairs mixed
Life form
Broadleaf plant
Climber
Look Alikes
Rhynchosia malachophylla differs from R. minima by its larger leaves with leaflets 1 to 8 cm long, while R. minima has leaflets of 0.8 to 2.5 cm long. R. viscosa differs from these two species by the presence of glandular and viscous yellow hairs on the stem, calyx and fruit.
It is also possible to distinguish these three species by the hairiness of the fruit
Rhynchosia viscosa has a hairy pod with long, stiff, yellow hairs tuberculate at the base and often glandular and sticky.
Rhynchosia malacophylla has pods with short, white puberulous hairs.
Rhynchosia minima has pods with long, white, tubercular hairs, non-viscous.
It is also possible to distinguish these three species by the hairiness of the fruit
Rhynchosia viscosa has a hairy pod with long, stiff, yellow hairs tuberculate at the base and often glandular and sticky.
Rhynchosia malacophylla has pods with short, white puberulous hairs.
Rhynchosia minima has pods with long, white, tubercular hairs, non-viscous.
| terminal leaflet larger than the length | large leaf (in order of 15 cm) | R. malacophylla |
| terminal leaflet as long as wide | R. viscosa | |
| small leaf (in order of 7 cm) | R. minima |
Identification keys of lianescent Fabaceae
| Bipinnate leaves | 1 to 2 pairs of pinnae | Mimosa pudica | |||||
| 3 to 9 pairs of pinnae | Mimosa diplotricha | ||||||
| Pinnate leaves | Clitoria heterophylla | ||||||
| Trifoliate leaves | symmetrical lateral leaflets | elliptical or lateral leaflets | terminal leaflets equal to lateral leaflets | Teramnus labialis | |||
| Terminal leaflets larger than lateral leaflets | very marked ribs | Cajanus scarabaeoides | |||||
| ribs lightly marked | leaflets > 10 mm | Desmodium adscendens | |||||
| leaflets < 10 mm | Desmodium triflorum | ||||||
| Ends of leaflets wedged | Narrow lanceolate leaflets (2 cm) | Macroptilium lathyroides | |||||
| large acuminate leaflets | Trigonal stem, scabrous at the angles | Desmodium intortum | |||||
| Cylindrical stem | Leaflets with a silver tinge | petiolules of 2 mm | Desmodium incanum | ||||
| petiolules 5 to 15 mm | Desmodium uncinatum | ||||||
| Green uniform leaflets | wide terminal leaflet (7 cm) | Centrosema pubescens | |||||
| very wide terminal leaflet(15 cm) | Centrosema plumieri | ||||||
| asymmetrical lateral leaflets | Terminal leaflet has a longer width than length | Rhynchosia malacophylla | |||||
| terminal leaflet as wide as long | large leaves (15 cm) | Rhynchosia viscosa | |||||
| small leaves (7 cm) | Rhynchosia minima | ||||||
| elongated terminal leaflets | lateral leaflets with a single rounded lobe | ||||||
| lateral leaflets without lobe | large stipules (6 mm) | Lablab purpureus | |||||
| small stipules (2 mm) | Mucuna pruriens | ||||||
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
There is content in another language. Please click here to read it. (Français)
There is content in another language. Please click here to read it. (Français)
Ecology
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Comoros: Species observed on Grande Comore at low altitude on sandy clay stony soil.
Mayotte: Rhynchosia viscosa is a native species which grows in the stations of the hygrophilic zone, in particular along the paths in forest. It is also found in crops, especially in the south of the island.
Reunion: Rhynchosia viscosa is a common species in the undergrowth of low and medium altitudes. It is located locally in the sugar cane fields.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
No Data
📚 Habitat and Distribution
General Habitat
Habitat
Terrestrial
Description
Geographical distibution
Reunion Island
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Worldwide distribution
Rhynchosia viscosa is a widespread species in tropical Africa in the Indian Ocean islands (Comoros, Madagascar, Mauritius, Reunion, Rodrigues, Seychelles), in India and in central China.
Rhynchosia viscosa is a widespread species in tropical Africa in the Indian Ocean islands (Comoros, Madagascar, Mauritius, Reunion, Rodrigues, Seychelles), in India and in central China.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
No Data
📚 Occurrence
No Data
📚 Demography and Conservation
Risk Statement
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Local harmfulness
Comoros : Rhynchosia viscosa is a rare weed in cultivated plots.
Mayotte: Rhynchosia viscosa is an uncommon weed, present in 2% of cultivated plots, especially in pastures, but also in food crops. It can also be found in ylang plantations.
Reunion : punctual weed in sugar cane, at low altitudes in the southwest plains of the island.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
No Data
📚 Uses and Management
Management
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Local control
Comoros: Rhynchosia viscosa is controlled manually.
Comoros: Rhynchosia viscosa is controlled manually.
Wiktrop
| Attributions | Wiktrop |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
No Data
📚 Information Listing
Global Biodiversity Information Facility (GBIF)
There is content in another language. Please click here to read it. (Français)
Thomas Le Bourgeois
| Attributions | |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
References
- Bosser J., Cadet TH., Guého J. & Marais W. 1990. Flore des Mascareignes, Vol. 80 Légumineuses in Bosser J., Fergusson I.K. Soopramanien C. ed. Flore des Mascareignes, La Réunion, Maurice, Rodrigues. MSIRI, Maurice, IRD, France, RBG, UK.
- Barthelat, F. 2019. La Flore illustrée de Mayotte. Meze, Paris, France, Collection Inventaires et Biodiversité, Biotope – Muséum national d’Histoire naturelle. 487 p.
- Huat, J., Nagy, M., Carpente, A., Schwartz, M., Le Bourgeois, T. & Marnotte, P. 2021. Guide de la flore spontannée des agrosystèmes de Mayotte. Montpellier, Cirad. 150 p.
Information Listing > References
- Bosser J., Cadet TH., Guého J. & Marais W. 1990. Flore des Mascareignes, Vol. 80 Légumineuses in Bosser J., Fergusson I.K. Soopramanien C. ed. Flore des Mascareignes, La Réunion, Maurice, Rodrigues. MSIRI, Maurice, IRD, France, RBG, UK.
- Barthelat, F. 2019. La Flore illustrée de Mayotte. Meze, Paris, France, Collection Inventaires et Biodiversité, Biotope – Muséum national d’Histoire naturelle. 487 p.
- Huat, J., Nagy, M., Carpente, A., Schwartz, M., Le Bourgeois, T. & Marnotte, P. 2021. Guide de la flore spontannée des agrosystèmes de Mayotte. Montpellier, Cirad. 150 p.
Images
Herbarium pictures ReCOLNAT: https://explore.recolnat.org/search/botanique/simplequery=Rhynchosia%2520viscosa
Thomas Le Bourgeois
| Attributions | |
| Contributors | |
| Status | UNDER_CREATION |
| Licenses | CC_BY |
| References |
There is content in another language. Please click here to read it. (Français)
No Data
🐾 Taxonomy
| Root | Root |
| Kingdom | Plantae |
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Fabales |
| Family | Fabaceae |
| Genus | Rhynchosia |
| Species | Rhynchosia viscosa (Roth) DC. |
📊 Temporal Distribution
📷 Related Observations
