Hypericum tetrapterum 四翼金絲桃

Common name: Square-stalked St John's-wort
Scientific name: Hypericum tetrapterum 四翼金絲桃
Genus: Hypericum 金絲桃屬
Family: Hypericaceae 金絲桃科, St. John's wort family

Remarks: 

Origin: native

Date: 9th Aug

283 An erect stoloniferous glabrous perennial, can reach up to 70cm.

293

294 Stem.

294-1 Enlarged photo above showing stem square in section, angles winged.

296 Lower stem, also square in section, angles winged. Upper surface of the leaves.

297-1 Upper surface of leaves showing the small translucent glands.

299 Lower surface of the leaves.

295 Leaves half-clasping stem. 

295-1 Black dots along the leaf margin.

301 Flower bud.

291 The inflorescence.

290-1 Side view of the flower showing sepals about 2/3 length of petals.

288 Flower pale yellow, about 1cm across.

292 Fruits.

Hypericum perforatum 貫葉連翹、 貫葉金絲桃、聖約翰草

Common name: Perforate St John's-wort
Scientific name: Hypericum perforatum 貫葉連翹、 貫葉金絲桃、聖約翰草
Genus: Hypericum 金絲桃屬
Family: Hypericaceae 金絲桃科, St. John's wort family

Remarks: 

Origin: native

Date: 22th June

43 An erect, glabrous, rhizomatous perennial, can reach up to 90 cm.

41-1 Stem with 2 raised lines. (vs stem with 4 raised lines, square in Hypericum maculatum 斑點金絲桃, imperforate St John's-wort)

37

38

36 Leaves to 2 cm.

36-1 Leaves with abundant small yellowish translucent glandular dots.

42 Underside of the leaf. Leaves are stalkless and nearly clasping the stem. (vs leaves are narrowed to base, not clasping stem in Hypericum maculatum 斑點金絲桃, imperforate St John's-wort)

42-1 Enlarged photo above to show the black dots on the leaf margin.

41 The inflorescence.

 

34 Flower bud.

34-1 Sepals are acute. (vs sepals are blunt in Hypericum maculatum 斑點金絲桃, imperforate St John's-wort)

39 Sepals shorter than petals.

32 Black dots along the edge of the petals.

31 Flowers about 2cm across.

31-1 A lot of stamens, 3 styles.

Hypericum maculatum 斑點金絲桃

Common name: Imperforate St John's-wort
Scientific name: Hypericum maculatum 斑點金絲桃
Genus: Hypericum 金絲桃屬
Family: Hypericaceae 金絲桃科, St. John's wort family

Remarks: 

Origin: native

Date: 24th (& 27th Aug)

An erect, glabrous, rhizomatous perennial, can reach up to 60 cm. (27th Aug)

Another plant, but it is still young without flower. Photo enlarged below to see the details of the stem. (27th Aug)

Stem with 4 raised lines, square in section. (vs stem with 2 raised lines in Hypericum perforatum 貫葉金絲桃, 貫葉連翹, 聖約翰草, perforate St John's-wort) There are black dots on the stem.

Another plant, see again the stem with 4 raised lines, square in section. (see the left part of the stem above)

Note the black dots on the margin of the leaf.

Note the black dots on the margin of the underside of the leaf.

Leaves are narrowed to base, not clasping stem. 18 (27th Aug)
(vs leaves with abundant small yellowish translucent glandular dots in Hypericum perforatum 貫葉金絲桃, 貫葉連翹, 聖約翰草, perforate St John's-wort)

The inflorescence, enlarged below to see the flower bud.

Sepals and petals with black glands. Sepals are blunt. (vs sepals are acute in Hypericum perforatum 貫葉金絲桃, 貫葉連翹, 聖約翰草, perforate St John's-wort)

Side view of the flower.

Flower is bright yellow, about 2 cm across.

Flower with numerous stamens, 3 styles.

The underside of the flowers. Photo enlarged below to see the details.

Petals are longer than or equal to 2 times of sepals.

The fruits are forming, with withering stamens.

Hypericum androsaemum 漿果金絲桃

Common name: Tutsan
Scientific name: Hypericum androsaemum 漿果金絲桃
Genus: Hypericum 金絲桃屬*
Family: Hypericaceae 金絲桃科, St. John's wort family

Remarks*: The generic name Hypericum comes from "Hyper" and "Eikon" in Greek, meaning above and picture respectively. It refers to the traditional hanging of the plants above religious pictures, to ward off evil, when they were harvested on St John the baptist’s day (June 24th – midsummers day). And it is also the reason why the family name is called St. Jons's wort.

Origin: native

Date: 15th June

An erect, branched, half-evergreen, shrubby perennial, can reach up to 100 cm. Plant is more or less shrubby. Stems are woody.

The flowering shoot.

Leaves are opposite, without stalks. Photo enlarged below to see the details of the stalk.

Stem with two raised lines. (could only see one line above - see the ridge indicated by the blue arrows)

Photo taken at another location. It is enlarged below to see the details of the stem. (26th June) 

2 lines (ridges) could be seen clearly on the stem in the above photo. (the blue arrows indicate the location of the ridges.) (26th June)
(vs stems with 4 ridges in Hypericum hircinum, stinking tutsan)

Leaves are glabrous and 10 cm long. Leaves are not smelling of goats when crushed. (vs are smelling strongly of goats when crushed in Hypericum hircinum, stinking tutsan)

The underside of the leaf.

Part of the few-flowered inflorescence.

Flower bud.

Flower is about 2 cm across. (vs 3 cm across in Hypericum hircinum, stinking tutsan)

Stamens are as long as petals. (vs stamens are longer than petals in Hypericum hircinum, stinking tutsan)

Side-view of the flower. Stamens are as long as petals. Photo enlarged below to see the details of the style.

Numerous stamens, 3 styles. Ovary could be seen clearly above. Style is shorter than the stamens.
(vs style is longer than stamens in Hypericum hircinum, stinking tutsan)
(vs 5 styles in Hypericum calycinum 大萼金絲桃, rose-of-Sharon)

The underside of the flower, showing the uneven sepals. (the sepals at 9 and 6 o'clock of the flower above are clearly thinner than the other sepals.) 

Red fruit with dropping stamens aside. It would turn black afterwards.