Chrysosplenium macrostemon var. macrostemon("Iwabotan")
Japanese name: イワボタン（岩牡丹） Scientific name:Chrysosplenium macrostemon var. macrostemon
[Overview]
A perennial found in somewhat shaded places along mountain streams.
Stolons extend after flowering.
The leaves are basal leaves and stem leaves borne on the flower stalk; the basal leaves are broadly ovate to narrowly ovate, and the stem leaves are ovate to elliptic.
The leaves are 0.5–5 cm long, with 4–9 teeth on the margin.
Several pairs of leaves near the tip of the stolon are larger than those at the base.
The leaf surface usually has grayish-white markings.
The petiole can reach 2.5 cm.
A flower stalk 3–15 cm tall is produced.
The flower stalk is tinged dark red, bears 1–2 pairs of leaves, and is hairless except in the leaf axils.
A cyme is produced at the tip of the flower stalk.
The inflorescence has leaf-like bracts; the lower bracts are dark green and elliptic to elliptic-lanceolate, and the upper bracts are yellow to yellowish green and ovate.
The flowers are 3–4.5 mm across, with no petals and a pale green to yellowish-green calyx.
The anthers are yellow, rarely tinged reddish brown.
The fruit is a capsule that splits open when ripe, revealing many seeds.
The seeds are elliptic to ovate.
