Cyanea magnicalyx is a shrub reaching 1.5–3 m in height, with stems branching from the base and around 1.3 cm in diameter. Its leaves are simple, though occasionally they appear compound with basal leaflets or segments. The leaves are alternate, with elliptic blades measuring 36–55 cm in length and 19–27 cm in width across the segments, and they are 0.4–4.5 cm wide between the segments. The apex is acuminate and apiculate, with upper surfaces green and glabrous and lower surfaces light green and glabrous. The leaf margins are pinnately cleft or parted towards the apex and pinnately compound towards the base, featuring narrowly oblong or triangular segments. The petioles are 12–21 cm long, glabrous, and muricate. It bears 6–15 flowers in axillary racemes with ascending, glabrous, and sparsely muriculate peduncles. The flowers are perfect, with a zygomorphic corolla (bilaterally symmetric), yellowish-white, and longitudinally striped with purple, measuring 65–70 mm long. The staminal column is glabrous, and the anthers have tufts of hairs at the apex. The ovary is inferior, 2-celled, with a 2-lobed stigma that becomes receptive after the style pushes out the pollen. It inhabits mesic forests at an elevation of approximately 450 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.