Hypericum pseudoerectum (Nomenclature)
Perennial herb 0.33–0.38 m tall, erect from woody? base, with stems [solitary?] unbranched below inflorescence. Stems narrowly 2(4)-lined at first, soon terete, eglandular; internodes 18–35 mm, shorter than leaves. Leaves sessile; lamina 25–37 × 7–14 mm, lanceolate to narrowly oblong, paler beneath, chartaceous; apex rounded to apiculate-obtuse, margin plane, base cordate-amplexicaul; venation: 3 pairs of main laterals from lower quarter to half of midrib; tertiary reticulation dense, scarcely visible above; laminar glands pale to (mostly) reddish, punctiform, dense; intramarginal glands black, rather dense. Inflorescence 6–c. 30-flowered from 2–3 nodes, ± dense, often with branches from one node below, the whole pyramidal to subcorymbose; pedicels 2–3 mm; bracts reduced-foliar, bracteoles linear-lanceolate to linear. Flowers c. 15 mm in diam., stellate; buds cylindric-ellipsoid, rounded. Sepals 5, unequal to subequal, 4.2–4.5 × 1.2 mm, narrowly oblong to lanceolate, rounded to subacute, entire; veins 5, outer branched and sometimes anastomosing; laminar glands pale, shortly striiform; marginal glands black, spaced to irregular, distal and few (1–2). Petals 5, yellow, not tinged red?, 7–10 × 2.3 mm, 1.7–2.3 × sepals, broadly oblanceolate, rounded, entire; laminar glands pale, linear to striiform; marginal glands black, few (2–7), subapical. Stamens c. 40, ‘3’-fascicled, longest c. 6 mm, 0.8–0.9 × petals; anther gland black. Ovary 2–3 × c. 1–1.5 mm, ellipsoid; styles 3, free, divergent, 2.2–2.5 mm, about equalling ovary; stigmas narrow. Capsule (immature?) c. 7 × 3.5 mm, ellipsoid. Seeds not seen.
Japan (Hokkaidō).
Hypericum pseudoerectum is known to me from the type collection only. It was first described by Kimura as a variety of 24. H. vulcanicum and then, in his monograph (Kimura, 1951), transferred to the affinity of 22. H. yamamotoi. But H. pseudoerectum differs from H. yamamotoi in several characters, for example the narrow leaves with pale to reddish laminar glands and more floriferous inflorescence. These characters mostly indicate a relationship with 24. H. vulcanicum; and H. pseudoerectum (which at first sight resembles H. erectum in general form) is morphologically intermediate between that species and 20. H. kawaranum.