사술괭이눈-[정명] Chrysosplenium japonicum (Maxim.) Makino f. tetrandrum H.Hara

과명	Engler- APG Ⅳ- Saxifragaceae (범의귀과)	속명	Chrysosplenium (괭이눈속)
전체학명	[정명] Chrysosplenium japonicum (Maxim.) Makino f. tetrandrum H.Hara	추천명	사술괭이눈
		영문명	Northern golden saxifrage

 

 

 

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GROWTH FORM

Mat-forming herb with extensively branched, thin, white rhizomes and also above-ground stolons, with branches up to 10 cm long. Most leaves basal. Flowering stems ascending to erect, mostly 1–3(5) cm tall but occasionally to 15(20) cm in fertilized sites, usually with 1–2 leaves, the uppermost attached near or above the middle of the stem, and several leaf-like bracts in the inflorescence. The entire plant is glabrous and green or yellowish green.

LEAF

Leaves alternate. Basal leaves on petioles up to 3 cm (or more), blades more or less orbicular or reniform in outline, 4–10 × 4–15 mm, with 5(7) broad, very shallowly incised lobes, apically rounded or nearly truncate. Stem leaves similar but usually smaller and with shorter petioles.

INFLORESCENCE

Inflorescence a dense or more open, bracteate cyme up to 1.5 × 3 cm. Bracts numerous, similar to basal leaves but with short petioles and blades with a cuneate base, usually 3–5-lobed, supporting branches and clusters of flowers in the inflorescence, functioning more or less as a broad perianth (in the absence of petals).

FLOWER

Flowers radially symmetric, ca. 3 mm broad, with 4 free sepals but no petals. Sepals 0.7–1.0 × 1.0–1.3 mm, very broadly ovate or triangular, obtuse, green. Stamens ca. 4 (the name ‘tetrandrum’ means ‘with four stamens’), minute, in the margin of a disc surrounding the gynoecium; filaments ca. 0.2 mm; anthers ca. 0.2 mm. Gynoecium of 2 carpels, fused in the lower part, with 2 free styles.

FRUIT

Fruit a 2-roomed capsule with several seeds. Capsule opening at the top with two valves into a shallow cup. Seeds glossy brown, ca. 0.8 × 0.5 mm.

Chrysosplenium tetrandrum (svalbardflora.no)