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Common Names in English:
Kalm´s St John´s-Wort, Kalm's St. John's-Wort, Kalm's St. Johnswort, Saint John's-Wort
Common Names in French:
Millepertuis De Kalm
Common Names in unspecified:
Kalm's St. Johnswort
, or perennial
or with simple
, with translucent
("pale") and often opaque
, black or reddish ("dark") glands
and sometimes abaxial
) and marginal
. Leaves opposite [or whorled
], sessile or short petiolate
pinnate to palmate [or rarely dichotomous], margin
entire or gland-fringed. Inflorescence cymose
. Flowers bisexual
, homostylous [or heterostylous], stellate
or cupped. Sepals 5 and quincuncial or rarely 4 and decussate, unequal or equal, free
or partly united
. Petals (4 or) 5, contorted, golden to lemon yellow [or rarely white], abaxially sometimes tinged or veined red, persistent
or deciduous after anthesis
, usually asymmetric
. Stamens in [4 or]5 fascicles, free and antipetalous
, or some united to form apparently 4 or 3 fascicles with compound
, or irregular and apparently not fasciculate, persistent or deciduous, each single fascicle with up to 70[-120] stamens; filaments
slender, free from nearly base
[or to 2/3 united] or apparently completely free; anthers
or ± basifixed
, dehiscing longitudinally, with gland
fascicles (fasciclodes) absent [very rare]. Ovary 3-5-loculed with axile
placentae or ± completely 1-loculed with (2 or) 3[-5] parietal
placentae, each placenta with [2 or] few to many ovules; styles (2 or) 3-5, free or partly to completely united, ± slender; stigmas small or ± capitate. Fruit a septicidal
capsule or rarely ± indehiscent, valves
often with oil-containing vittae or vesicles
. Seeds small, often carinate
or narrowly unilaterally winged
; testa variously sculptured
, not arillate
[very rarely carunculate]; embryo slender, straight, with distinct
About 460 species: almost cosmopolitan except for arctic and desert areas and most of the lowland tropics; 64 species (33 endemic) in China.
Flowers: Bloom Period: June. • Flower Color: yellow
Size: 24-36" tall.
Care: Shear after flowering to encourage reblooming. Follow a regular watering schedule during the first growing season to establish an extensive root system . Feed regularly during the growing season with a general purpose fertilizer . Prune annually in late winter to promote vigorous new growth.
Culture: Space 24-36" apart.
Soil: Prefers organic soil. Needs well-drained soil. Good for dry soils.
Sunlight: Sun Exposure: Light Shade.
Temperature: Cold Hardiness: 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b. (map)
- Whittaker & Margulis,1978
- Haeckel, 1866
- Cavalier-Smith, 1981
- Sinnott, 1935 ex Cavalier-Smith, 1998
- Vascular Plants
- Kenrick & Crane, 1997
- Brongniart, 1843
- Takhtajan, 1967
- Superorder: Theanae () - Thorne Ex Reveal, 1993
- Subclass: Rosidae () - Takhtajan, 1967
- Class: Spermatopsida () - Brongniart, 1843
- Infraphylum: Radiatopses () - Kenrick & Crane, 1997
- Subphylum: Euphyllophytina ()
- Phylum: Tracheophyta () - Sinnott, 1935 ex Cavalier-Smith, 1998 - Vascular Plants
- Subkingdom: Viridaeplantae () - Cavalier-Smith, 1981
- Kingdom: Plantae () - Haeckel, 1866 - Plants
Publishing author : L. Publication : Sp. Pl. 2: 783 1753 [1 May 1753]
Members of the genus Hypericum
ZipcodeZoo has pages for 124 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them:
H. acutifolium (Sharpleaf St. Johnswort) · H. adpressum (Creeping St. Johnswort) · H. anagalloides (Tinker's Penny) · H. androsaemum (Sweet Amber) · H. androsaemum L. 'Gladys Brabazon' (Sweet Amber) · H. androsaemum 'Albury Purple' (Sweet Amber) · H. androsaemum 'Esm Cho' (Tutsan 'esm Cho') · H. androsaemum 'Esm Española' (Tutsan 'esm Espa) · H. androsaemum 'Esm Greli' (Tutsan 'esm Greli') · H. androsaemum 'Esm Kalua' (Tutsan 'esm Kalua') · H. androsaemum 'Esm Ora' (Tutsan 'esm Ora') · H. androsaemum 'Esm Pin' (Tutsan 'esm Pin') · H. androsaemum 'Esm Re' (Tutsan 'esm Re') · H. androsaemum 'Esm Wet' (Tutsan 'esm Wet') · H. androsaemum 'Glacier' (Sweet Amber) · H. androsaemum 'Glob Dr205' (Tutsan 'glob Dr205') · H. androsaemum 'Glob Lp208' (Tutsan 'glob Lp208') · H. androsaemum 'Golden Tutsan' (Golden Tutsan St. John's Wort) · H. androsaemum 'Verpeacla' (Tutsan 'verpeacla') · H. ascyron (Great St. Johnswort) · H. ascyron gebleri (Great St. Johnswort) · H. boreale (Northern St. Johnswort) · H. brachyphyllum (Coastalplain St. Johnswort) · H. brathys (St. Johnswort) · H. buckleii (Buckley's St. Johnswort) · H. calcycinum (St. John's Wort) · H. calycinum (Aaron's Beard) · H. calycinum 'Brigadoon' (Aaron's Beard) · H. canadense (Lesser Canadian St. Johnswort) · H. canadense boreale (Lesser Canadian St. Johnswort) · H. canariense (Canary Island St. Johnswort) · H. cerastoides (Hypericum) · H. chapmanii (Apalachicola St. Johnswort) · H. cistifolium (Round-Pod St John´s-Wort) · H. concinnum (Goldwire) · H. crux-andreae (Atlantic St. Peter's-Wort) · H. cumulicola (Highlands Scrub Hypericum) · H. densiflorum (Bushy St. Johnswort) · H. denticulatum (Coppery St. Johnswort) · H. diosmoides (Puerto Rico St. Johnswort) · H. dissimulatum (Disguised St. Johnswort) · H. dolabriforme (Straggling St. Johnswort) · H. drummondii (Nits and Lice) · H. edisonianum (Edison Ascyrum) · H. ellipticum (Pale St. Johnswort) · H. elodes (Marsh Hypericum) · H. exile (Florida Sands St. Johnswort) · H. fasciculatum (Peelbark St. Johnswort) · H. forrestii (Forrests St. Johns Wort) · H. fortuneana 'Purple Fountain' (St. Johns Wort) · H. frondosum (Golden St John´s-Wort) · H. frondosum 'Sunburst' (Cedarglade St. John's Wort) · H. galioides (Bedstraw St. Johnswort) · H. gentianoides (Orangegrass) · H. gramineum (Small St John´s-Wort) · H. graveolens (Mountain St. Johnswort) · H. gymnanthum (Claspingleaf St. Johnswort) · H. harperi (Sharplobe St. Johnswort) · H. hookerianum (Hookers St. Johnswort) · H. humifusum (Trailing St John´s-Wort) · H. humifusum suborbiculatum (Trailing St. Johnswort) · H. hypericoides (Reclining St Andrew's Cross) · H. hypericoides hypericoides (St Andrews Cross) · H. hypericoides multicaule (St. Andrew's Cross) · H. hypericoides subsp. multicaule (St. Andrew's Cross) · H. japonicum (Matted St. Johns Wort) · H. kalmianum (Kalm´s St John´s-Wort) · H. kelleri (Hypericum) · H. lancasteri (Lancasters St. Johns Wort) · H. laricifolium (St. Johns Wort) · H. lissophloeus (Smoothbark St. Johnswort) · H. lloydii (Sandhill St. Johnswort) · H. lobocarpum (Fivelobe St. Johnswort) · H. majus (Large St Johnswort) · H. microsepalum (Flatwoods St. Johnswort) · H. mitchellianum (Blue Ridge St. Johnswort) · H. moseranum 'Tri-Color' (Gold Flower) · H. moserianum (St. Johnswort) · H. multicaule (St. Andrew's Cross) · H. mutilum (Dwarf St Johnswort) · H. myrtifolium (Myrtleleaf St. Johnswort) · H. nitidum (Carolina St. Johnswort) · H. nudiflorum (Early St. Johnswort) · H. oblongifolium (St. Johnswort) · H. olympicum f. minus 'Variegatum' (St. Johns Wort) · H. parvulum (Sierra Madre St. Johnswort) · H. patulum Thunb. 'Sungold' (St. Johns Wort) · H. patulum 'Hidcote' (Hidcote Hypericum) · H. patulum 'Variegatum' (St. Johns Wort) · H. pauciflorum (Fewflower St. Johnswort) · H. perforatum (Common St Johnswort) · H. perforatum chinense (Common St Johnswort) · H. polyphyllum (Rockery St. Johns Wort) · H. prolificum (Cinnamon Stick) · H. pseudomaculatum (False Spotted St. Johnswort) · H. pulchrum (Slender St. Johns Wort) · H. punctatum (Spotted St Johnswort) · H. reductum (St Johns Wort) · H. reptans (Creeping St. John's Wort) · H. revolutum keniense (Forest-Primrose)
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Accessed through GBIF Data Portal November 22, 2007:
- Canadian Museum of Nature, Canadian Museum of Nature Herbarium
- Missouri Botanical Garden, Missouri Botanical Garden
- USDA PLANTS, USDA PLANTS Database
- University of Alabama Biodiversity and Systematics, Herbarium
- Biodiversity Heritage Library NamebankID: 2647498
- Catalogue of Life Accepted Name Code: ITS-21444
- Global Biodiversity Information Facility Taxonkey: 2481042
- Globally Unique Identifier: urn:lsid:ipni.org:names:433528-1
- GRIN Nomen Number: 312130
- Integrated Taxonomic Information System (ITIS) Taxonomic Serial Number (TSN): 21444
- International Plant Names Index (IPNI) ID: 433526-1
- Natural Heritage Network Species Identifier: PDCLU030Y0
- U.S.D.A. Plant Symbol: HYKA
- Zipcode Zoo Species Identifier: 43737