Hypericum asahinae Makino

Perennial herb 0.15–0.3(–0.35) m tall, erect to ascending from branching rootstock, with stems ± numerous, caespitose, sometimes branching from below inflorescence. Stems terete (‘var.’ siroumense) or upper nodes slightly 2-lined and ancipitous (‘var.’ asahinae), eglandular; internodes 15–30 mm, about equalling leaves. Leaves sessile; lamina 20–30(–35) × 9–15(–18) mm, ovate-lanceolate to lanceolate or (lower) elliptic, paler beneath, chartaceous; apex subacute to rounded, margin plane, base cordate-subamplexicaul to broadly cuneate; venation: 2–4 pairs of main veins from lower third to base of midrib, tertiary reticulation rather dense, visible on both sides; laminar glands black, sometimes also pale, punctiform, minute, scattered, especially towards base, apex and margin; intramarginal glands black or a few pale, dense. Inflorescence 5-c. 20-flowered, from up to 3 nodes, sometimes with branches from node below, the whole loosely cylindric to subcorymbiform; peduncles elongate, slender, pedicels 1–3 mm; bracts reduced-foliar, bracteoles linear. Flowers (18–)20–25 mm in diam., stellate; buds ellipsoid, obtuse. Sepals 5, subequal, (3–)3.5–6 × (0.7–)1–1.3 mm, lanceolate to linear-lanceolate, acute, entire [or rarely with one prominent gland fide Kimura fig.]; veins 3–5, outer branched; laminar glands black, linear to punctiform; marginal glands black, few or usually absent. Petals 5, yellow, sometimes tinged red, 9–13(–15) × 4–6.3 mm, c. 2.5–3 × sepals, oblong-obovate, rounded, entire; laminar glands black, linear to punctiform; marginal glands black, 1–2 or usually absent. Stamens c. 50 (or more?), ‘3’-fascicled, longest 7–10 mm, 0.65–0.75 × petals; anther gland black. Ovary 2.5–4 × 1.5–2.5? mm, ovoid to ovoid-cylindric; styles 3, free, spreading?, 5–8 mm, 1.5–2.7 × ovary; stigmas narrow. Capsule and seeds not seen.