Hypericum tetrapterum (syn.H. quadrangulum) is a herbaceousperennial plant species in the flowering plant family Hypericaceae. Its common names include St. Peter's wort, Peterwort, square stemmed St. John's wort, and square stalked St. John's wort.
Hypericum tetrapterum is a rhizomatous, glabrous perennial plant growing up to 1.2 m (3 ft 11 in) in height.[1][2]: 340 The stems are square in cross section, with conspicuous wings at the corners. The leaves are in opposite pairs, simple and entire, and have many translucent glandular dots. The thinly papery leaves are up to 40 mm (2 in) long and 24 mm (0.9 in) across and paler underneath.[1] The flowers are produced in flowerheads of 10–30 flowers (up to 70), each flower 10–15 mm (0.39–0.59 in) in diameter with 5 pale yellow petals and 5 sepals.[1] There may be black glands on the petals and sepals, as well as on the leaves.[2]
Distribution and habitatedit
Hypericum tetrapterum is common in damp habitats such as marshes, streamsides, open ditches, meadows, and springs throughout Europe.[3][1]
Referencesedit
Wikimedia Commons has media related to Hypericum tetrapterum.
^ abStace, C. A. (2010). New Flora of the British Isles (Third ed.). Cambridge, U.K.: Cambridge University Press. ISBN9780521707725.
^"Hypericum tetrapterum L." Retrieved 19 August 2015.
December 20, 2023
hypericum, tetrapterum, quadrangulum, herbaceous, perennial, plant, species, flowering, plant, family, hypericaceae, common, names, include, peter, wort, peterwort, square, stemmed, john, wort, square, stalked, john, wort, scientific, classificationkingdom, pl. Hypericum tetrapterum syn H quadrangulum is a herbaceous perennial plant species in the flowering plant family Hypericaceae Its common names include St Peter s wort Peterwort square stemmed St John s wort and square stalked St John s wort Hypericum tetrapterumScientific classificationKingdom PlantaeClade TracheophytesClade AngiospermsClade EudicotsClade RosidsOrder MalpighialesFamily HypericaceaeGenus HypericumSection Hypericum sect HypericumSubsection Hypericum subsect HypericumSeries Hypericum ser HypericumSpecies H tetrapterumBinomial nameHypericum tetrapterumFries 1 SynonymsHypericum quadrangulumDescription editHypericum tetrapterum is a rhizomatous glabrous perennial plant growing up to 1 2 m 3 ft 11 in in height 1 2 340 The stems are square in cross section with conspicuous wings at the corners The leaves are in opposite pairs simple and entire and have many translucent glandular dots The thinly papery leaves are up to 40 mm 2 in long and 24 mm 0 9 in across and paler underneath 1 The flowers are produced in flowerheads of 10 30 flowers up to 70 each flower 10 15 mm 0 39 0 59 in in diameter with 5 pale yellow petals and 5 sepals 1 There may be black glands on the petals and sepals as well as on the leaves 2 Distribution and habitat editHypericum tetrapterum is common in damp habitats such as marshes streamsides open ditches meadows and springs throughout Europe 3 1 References edit nbsp Wikimedia Commons has media related to Hypericum tetrapterum a b c d e Hypericum tetrapterum Fr hypericum myspecies info Retrieved 2018 10 26 a b Stace C A 2010 New Flora of the British Isles Third ed Cambridge U K Cambridge University Press ISBN 9780521707725 Hypericum tetrapterum L Retrieved 19 August 2015 Retrieved from https en wikipedia org w index php title Hypericum tetrapterum amp oldid 1168255436, wikipedia, wiki, book, books, library,
