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.