Hypericum calycinum
Creeping St. John's Wort

 Plant Type:
 Hardiness:
 Deciduous / Evergreen:
 Flowers:
Yellow (Interesting, bright yellow 3" flowers with a dome of stamens on new growth in the summer)
 Foliage:
Green (Dark blue-green leaves, glaucous beneath; no appreciable fall color)
 Fruit:
Brown (Not ornamentally important)
 Ultimate Height:
18 feet
 Ultimate Spread:
24 feet
 Soil:
Widely adapted to soils; best in well-drained soil
 Range:
Southeastern Europe, Turkey
 Diagnostic Characteristics:
Opposite, simple, ovate, sessile leaves (2-4" long by 0.5-1.75" wide) arranged with a decussate phyllotaxy (where leaf pairs, in an opposite arrangement, grow perpindicular to the previous pair). The showy flowers, borne in small cymes, are 2- 3" across with 5 petals and a large dome of numerous long stamens. Stems are 4-angled.

Additional Information

Relatively trouble-free. Tolerates dry conditions well (even drier shade). Generally, tops are killed back in severe winters near its limit of hardiness. Mowing to the ground each spring improves aesthetics of the following regrowth. Slow to leaf out in spring. Can be invasive via spreading stolons. Poisonous to animals.

When Hypericum calycinum has been observed flowering or fruiting at Purdue University

Flowering

JanFebMarAprMayJunJulAugSepOctNovDec

Fruiting

JanFebMarAprMayJunJulAugSepOctNovDec

7 Hypericum calycinum found

Building Map...

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= Heritage plant = Memorial plant
Number Accession ID Location
12009_15650*ADAUC
22009_15631*ALYNN
32014_00142*ADAUC
42014_00142*BDAUC
52009_15632*ALYNN
62023_00775*AHORT
72023_00775*BHORT

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