B. quinquealata

Culture

Endangered Status

Critically endangered, under criteria CRB2abiii&v (area of occupancy <10km2, a single location, and a continuing decline in the area and quality of habitat, and the number of mature individuals).

Original Botanical Description or Link to

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0194877: Monoecious rhizomatous herb. Rhizome long creeping, to 40 cm or longer, 3−5 mm thick, densely hirsute, hairs pale magenta, internodes 1.5−5 cm long. Stipules persistent, pale green to reddish, triangular, 6–10 mm long, 4–8 mm wide, herbaceous, strongly keeled, densely hirsute, margin entire, apex aristate, arista 3–5 mm long. Leaves alternate, petiole terete, reddish, 3.2−8 cm long, 3−4 mm thick, densely hirsute; leaf blade asymmetric, oblique, widely ovate, 6.5−10.2 cm long, 4.7–7.8 cm wide, broad side 3–4.8 cm wide, basal lobes cordate, 1.7–2.8 cm long, apex acuminate to attenuate, margin denticulate and lined with white to magenta, scabrous hairs; leaf thick chartaceous, succulent, adaxially olive green; adaxially densely hirsute; abaxially pale green, hirsute on all veins; venation basally ca. 7 palmate, midrib distinct, ca. 3 secondary veins on each side, other primary veins branching dichotomously or nearly so, tertiary veins reticulate. Inflorescences an axillary, bisexual, cymosely branching panicle ca. 11 cm long, peduncle 8.5–10 cm long, dichasial cymes arising directly from rhizome, branched 3–4 times, erect or ascending, reddish, densely hirsute; protandrous. Bracts reddish, hyaline, deciduous, those at basal node of inflorescence ovate to lanceolate, 3–4 mm long, 1.5–2.5 mm wide, apex mucronate apiculate, margin entire or with hirsute, abaxially red hirsute or scabrous; bracts at summit of inflorescence to 1.5 mm long, 1 mm wide. Staminate flower: pedicel 0.5–0.6 cm long, scabrous, tepals 4, white to pinkish, outer 2 widely ovate or obovate to suborbicular, ca. 1 cm long across, abaxially red scabrous, inner 2 obovate or oblanceolate, 1–1.3 cm long, 0.5–0.6 cm wide, apex truncate to retuse; androecium sub-zygomorphic, ca. 0.4 cm across; stamens yellow, 25–30; filaments shortly fused at base; anthers obovate, ca. 0.8 mm long, 2-locular, apex apiculate, more or less equal to filaments. Pistillate flower (immature): pedicel 0.5–0.8 cm long, red scabrous; ovary yellowish-green to red, body trigonous-ellipsoid, ca. 7 mm long, 4 mm thick (wings excluded), sparsely red scabrous; 5-winged, wings unequal, ca. 1 cm long, lateral wings narrower, narrowly sub-trapezoid, ca. 3 mm wide, abaxial wing crescent-shaped, cucullate, ca. 5 mm wide, margin red scabrous, additional wing ca. 1 mm wide; outer tepals 2, abaxially red scabrous. Capsule pendent, pedicel 11–12 mm long, tepals deciduous; body trigonous-ellipsoid, 12–14 mm long, ca. 5 mm thick (wings excluded), greenish or reddish when fresh; wings 5, unequal, red scabrous, lateral wings 3–4 mm wide, abaxial wing ca. 9 mm wide, strongly cucullate, additional 2 side-wings 1–2 mm wide.