Cyanea konahuanuiensis Sporck-Koehler, M. Waite & A. M. Williams

Unarmed shrubs 57–69 cm high, with 1–6 stems originating at the base; stems light green and darkening to a light brownish gray closer to the base, erect to decumbent, 58–119 cm in length, some branches partially resting on the ground, occasionally rooting when in contact with the soil or moss producing aerial roots, leaf scars subcircular, 9.5–12 × 6.5–11.8 mm, upper end of leaf scar depressed, basal portion slightly raised; leaf scar with a protuberance; latex white. Leaves clustered distally near end of stems, petiolate; petioles 2–4.2 cm long, pubescent; blades elliptic to oblong, in adult plants 20–33 × 10–16 cm, base cuneate to rounded, occasionally slightly truncate, apex acute to sub-obtuse, margins serrate to serrate-dentate, dull grayish-green on adaxial surface and dull greenish white on abaxial surface, stiff, slightly fleshy, both surfaces densely hirsute and minutely muricate; in juvenile plants leaves are less stiff, margins dentate, and hairs softer. Inflorescences axillary just above the leaf, up to 4 per stem, young inflorescences roughly perpendicular to stem, larger and more developed inflorescences pendant, 3–12 flowered, peduncles 5–12.2 cm long (dried specimen 7.7 cm long), pubescent. Flowers on pedicels 7–14 mm long (5–10 mm when dried), pubescent, subtended by linear bracts 7–18 × 2–6 mm, apex obtuse, margins entire, densely pubescent; hypanthium 10–15 mm (9–14 mm when dried) × 7–10 mm (5–7 mm when dried), obovoid to cylindrical, pubescent; calyx lobes linear to linear-oblong,16–18 × 5–7 mm (13–17 × 3–5 mm when dried), apex acute to subobtuse, retained on immature (green) fruits (no mature fruit seen); corolla dark purple with some lighter streaks developing with age, tubular, laterally compressed, curved, 86–99 mm long (80–95 mm when dried) × 12–13 mm wide medially (9–12 mm when dried), externally densely pubescent, internally glabrous, the lobes linear-subulate, 10–16 mm long × 5 mm wide at the base, reflexed, c. 1/4–1/3 as long as the tube; staminal column glabrous, adnate to corolla for half its length, anthers 9–10 mm long, scantily pubescent, the lower two with apical tufts of white hairs 2–3 mm long. Fruits berries (mature fruits not seen), immature fruits densely pubescent, with calyx lobes persistent. Seeds from immature fruits numerous, embedded in green pulp, obovoid, 0.74–0.84 × 0.58–0.64 mm, testa medium to dark brown, shiny and smooth.

Known only from the Kōnāhua-nui summit area in the Ko‘olau Mountains of O‘ahu, Hawaiian Islands. The population is on land owned by the State of Hawai‘i, Department of Land and Natural Resources (DLNR), and is part of the Honolulu Watershed Forest Reserve (Figure 1).

Cyanea konahuanuiensis, known by the common name of Hāhā mili‘ohu (English: the Cyanea that is caressed by the mist), is a species of plant from the Ko‘olau Mountains of O‘ahu, Hawaiian Islands. It was described in 2015, and the wild population consists of approximately 20 mature plants. The species was assessed to be critically endangered in 2017.