Family: St John's-wort [Hypericaceae]


Adenosepalum

Androsaemum

Ascyreia

Elodes


Hypericum

Inodora

Oligostemma

Olympia


Spachium

Taeniocarpium

NOTE WELL : The above 'Genera' are actually 'Sections' and as such, BSBI does not list them in its Genera database, all except for the section 'Hypericum' which is also a Genus name. All the Genera names of this Hypericaceae Family begin with 'Hypericum'. (This is similar to the sections in Dandelion where all the species come under the Genera 'Taraxacum').

Clusiaceae has, in part, been subsumed into this the St Hohn's Wort Family, newly re-named the Hypericaceae Family. It was previously named the Guttiferae.



[HYPERICUM] St John's-worts

There are various differentiating indicators to look out for when trying to identify the various St. John's Worts and Tutsans. The first is whether or not there are black dots on either the sepals or the petals or on both, and whether there are also any red dots. The second is to ascertain whether or not there are any black dots on the leaves (and if so which surface, upper or lower) and whether or not there are any translucent dots (best seen by transmitted light). The third is whether or not there are any fine ridges or lines on the stems, and if so, whether there are two or four. A fourth is whether or not the stem is round or square. These are the main identifying features, but size of flower and proportionate length of petals to sepals are further attributes helping identification.

 

St. JOHN'S WORT HYBRID CHART (shrunk)
Hybrid Chart: St. JOHN'S WORT (larger)

Hypericum SPECIES LACKING HYBRIDS
(Hypericum 'Hidcote')
(Hypericum calycinum) Rose-of-Sharon
(Hypericum canadense) Irish St. John's-wort
(Hypericum elodes) Marsh St. John's-wort
(Hypericum forrestii) Forrest's Tutsan
(Hypericum hirsutum) Hairy St. John's-wort
(Hypericum maculatum subsp. maculatum) Imperforate St John's-wort
(Hypericum maculatum subsp. obtusiusculum) Imperforate St John's-wort
(Hypericum montanum) Pale St. John's-wort
(Hypericum nummularium) Round-leaved St John's-wort
(Hypericum olympicum) Olympic St. Johnswort
(Hypericum pseudohenryi) Irish Tutsan
(Hypericum pulchrum) Slender St. John's-wort
(Hypericum xylosteifolium) Turkish Tutsan

Rose of Sharon (Hypericum calycinum) Photo: © RWD

Hairy St. John's Wort (Hypericum hirsutum) Photo: © RWD

Trailing St. John's Wort (Hypericum humifusum) Photo: © RWD

Slender St. John's Wort (Hypericum pulchrum) Photo: © RWD

Tutsan (Hypericum androsaemum) Photo: © RWD

Stinking Tutsan (Hypericum hircinum) Photo: © RWD

Family: St John's Wort [Hypericaceae]

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