Hypericum canariense L., Hypericaceae

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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results: 

Reject, score: 14 (Go to the risk assessment (Australia))
High risk, score: 9 (Go to the risk assessment (Pacific))

Common name(s): [more details]

English: Canary Islands St. Johnswort

Spanish: granadillo

Habit:  shrub

Description:  "Many-branched shrubs 1-4 m tall. Leaves oblong-lanceolate to narrowly elliptic-lanceolate, 5-7 cm long, 1.2-1.6 cm wide, glabrous, glandular punctate with translucent glands, base cuneate to attenuate, sessile and somewhat amplexicaul. Flowers 2-3 in cymes terminating the upper stems, the cymes arranged in panicles, pedicels 10-20 mm long in fruit; sepals ovate to lanceolate, ca. 3 mm long, apex acute to obtuse; petals yellow, spatulate, ca. 17-19 mm long, apex hooded; stamens 12-36, in 3 clusters; styles 3. Capsules coriaceous, ovoid, 3-lobed, apex truncate. Seeds numerous, pale reddish brown, elongate-cuneate, 1.4-1.6 mm long, reticulate" (Wagner et al., 1999; p. 544).

Habitat/ecology:  "In the Canary Islands, [x]erophytic scrub and forest zones 150-800 m, locally very common" (Bramwell & Bramwell, 1974; p. 162).

Propagation:  Wind-dispersed seed.

Native range:  Canary Islands.

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
State of Hawaii Hawaiian Islands	Maui Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 544) Voucher cited: Hobdy 2394 (BISH) Sparingly naturalized.

Pacific Rim
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
United States (west coast) United States (west coast states)	USA (California)	introduced	U.S. Dept. Agr., Agr. Res. Serv. (2011)

Control:  Control information from the Bugwood Wiki.

Additional information:
Report (PDF format) from US Geological Survey, Biological Resources Division, Haleakala Field Station, Hawaii "Plants of Hawaii".
Information from the University of California Santa Cruz.
Information from the Bugwood Wiki

Additional online information about Hypericum canariense is available from the Hawaiian Ecosystems at Risk project (HEAR).

Information about Hypericum canariense as a weed (worldwide references) may be available from the Global Compendium of Weeds (GCW).

Taxonomic information about Hypericum canariense may be available from the Germplasm Resources Information Network (GRIN).

References:

Bramwell, D./Bramwell, Z. I. 1974. Wild flowers of the Canary Islands.

U. S. Government. 2011. Integrated Taxonomic Information System (ITIS) (on-line resource).

U.S. Dept. Agr., Agr. Res. Serv. 2011. National Genetic Resources Program. Germplasm Resources Information Network (GRIN). Online searchable database.

Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. 1999. Manual of the flowering plants of Hawaii. Revised edition. Bernice P. Bishop Museum special publication. University of Hawai‘i Press/Bishop Museum Press, Honolulu. 1919 pp. (two volumes).