Mucuna persericea is a woody liana. The branches are sparsely pubescent, with adpressed to erect hairs. The leaves are compound (trifoliate) and alternate, with the lamina of the apical leaflet measuring 10.5–14 × 5.5–8.5 cm, elliptic, rounded at the base, and acute at the apex. The lateral leaflets are 12–14.7 × 8–10 cm, basally and medially asymmetric. The abaxial surface of all leaflets is densely sericeous, with hairs 0.1–0.2 cm long, while the adaxial surface is more sparsely sericeous with shorter hairs. The venation is eucamptodromous (venation in which the secondary veins do not reach the margin and do not form a series of prominent arches.), with 4–7 pairs of secondary veins. The leaflet apices are acute to weakly acuminate, and the bases are rounded to weakly cordate. The lower surfaces of all leaflets are densely sericeous, and the upper surfaces are more sparsely sericeous. The leaflet margins are entire. The petioles are 8.5–12 cm long and sericeous, with a rachis that is 2.5–3.5 cm long and sericeous, stipellate between leaflet pairs and at the apex. The stipels are 0.5–0.8 cm long and linear. The petiolules are 0.5–0.7 cm long and densely sericeous. The stipules are 0.7–1 cm, triangular, silvery-sericeous, and caducous. The flowers are arranged in a pseudoraceme, which is pendent. The peduncle is 4–8 cm long and densely golden-sericeous. The rachis is 10–13 cm long, with bracts measuring 1.6–2.1 × 0.5 cm, sericeous, and bracteoles about 3.5 × 2.5 cm, densely sericeous. The pedicels are paired at nodes, about 1 cm long, and more densely sericeous than the peduncle. There are 7–12 nodes per inflorescence, with internodes about 1–2 cm long. The flowers are papilionaceous and 4–5 cm long. The calyx is campanulate, 2.5–3 cm long, bilabiate, and sericeous on both surfaces, with the external surface having hairs of two lengths and four lobes, with the two adaxial ones connate, 1–2 cm long. The corolla consists of 5 petals, reportedly yellow. The standard petal is 3.5–4 cm long, showy, variously colored, shorter than other petals, with wings incurved, stiffened at the apex, basally auriculate, and apically rounded. The wing petals are 4.5–5 cm long, attenuate at the base, weakly acute at the apex, and basally pubescent, with a 0.2–0.3 cm long claw. The keel petals are 4–5 cm long, attenuate at the base, acute at the apex, basally pubescent, with a claw 0.1 cm long. The stamens are 4.5–5 cm long and glabrous, with anthers that are 0.2–0.3 cm long, basifixed, and the connective tomentose. The upper stamen is distinct, while the other nine are connate into a tube. The anthers are dimorphic, with five larger subbasifixed anthers alternating with five shorter anthers. The ovary is superior, sessile, 4–5 cm long, densely sericeous except for the glabrous apex. The ovary is 8 × 2 mm, oblong, with few ovules. The style is 3.2–4.2 cm long, filiform, and glabrous apically, with a small, terminal stigma. The fruit is tough and flexible, measuring 10 to 12 cm wide and 4 cm long. The surface has short, dense, spreading pale fine hairs and irritant red bristles. The fruit margin has a pair of distinct wings. The seeds are brownish black, large, 20 to 23 mm in diameter. It occurs in wet forests, mesic grasslands, and shrublands between 21-149 meters.
Bean-shaped (Reniform): Resembling the shape of a kidney or bean.
Square or Oblong: Angular shape with all sides more or less equal or longer than wide.
Triangular: Three-sided shape, broadest below the middle.
Elliptic: Rounded at both ends. shaped like an ellipse or oval.
Ovate or Obovate: egg-shaped, broader at one end.
Linear: Extremely long and narrow, with sides usually parallel.
Round: Appears circular, with length and width roughly the same.
Cardioid (Heart-Shaped): One edge has a prominent double curve into two lobes.
Cylindrical: A cylinder with parallel sides and a circular cross-section.
Discoid: Resembling a disc or plate with two relatively flat surfaces.
Fusiform: Spindle-shaped, tapering at both ends.
Globose: Spherical.
Lenticular: Resembling a lens with two convex surfaces.
Ovoid: Egg-shaped.
Plano-convex: Having a flat ventral (planar) surface and a curved dorsal (convex) surface.
Polygonal: Having more than three flat faces meeting at angles.
Sectoroid: Resembling a segment of an orange with two relatively flat faces and one curved face.
Subglobose/ellipsoid: Inflated shape but less than spherical.
Trigonous: Having three faces that meet at a distinct angle; triangular in cross-section.
Endangered species (E) are species that are so rare they’re in danger of becoming extinct.
Threatened species (T) are species that are likely to become endangered within the foreseeable future throughout all or a significant portion of their range.
Species of Concern (SOC) are species about which there are some concerns regarding status and threats, but insufficient information is available to list the species under the Endangered Species Act (ESA).
Plant Extinction Prevention (PEP) is a state status for rare plants that focuses its efforts on species that have fewer than 50 remaining wild individuals.
Orthodox seeds (desiccation-tolerant): can be dried to an internal seed moisture of less than 12% water and stored at freezing temperatures.
Intermediate seeds (temperature-sensitive) tend to age faster than orthodox seeds and may have only a 5-year lifespan when stored at -20°C. They are recommended for storage at 5°C.
Recalcitrant seeds (desiccation-sensitive): cannot be stored in a conventional freezer as they cannot survive after drying and/or freezing at -20°C. They are recommended for cryopreservation storage.