Canna glauca

taxobox
name = "Canna glauca"

---

image_caption = "Canna glauca", aquatic cannas.
regnum = Plantae
unranked_divisio = Angiosperms
unranked_classis = Monocots
unranked_ordo = Commelinids
ordo = Zingiberales
familia = Cannaceae
genus = "Canna"
species = "C. glauca"
binomial = "Canna glauca"
binomial_authority = L.|

"Canna glauca" L. is a species of the "Canna" genus, a member of the family Cannaceae. It originates from the wetlands of tropical America and was introduced to England in 1730. It is a perennial growing to 1.5m. It is hardy to zone 10 and is frost tender. In the north latitudes it is in flower from August to October, and the seeds ripen in October. The flowers are hermaphrodite.Johnson's Gardner's Dictionary (1856)]

=Synonyms=
* "Canna angustifolia" L.
* "Canna elegans" Raf.
* "Canna hassleriana" Kraenzl.
* "Canna lanceolata" Lodd.
* "Canna liturata" Link ex A.Dietr.
* "Canna mexicanna" A.Dietr.
* "Canna pedicellata" C.Presl.
* "Canna pruinosa" Hoffmanns., Verz. Pfl.-Kult.
* "Canna schlectendaliana" Bouché
* "Canna siamensis" Kraenzl.
* "Canna stolonifera" D.Dietr.
* "Canna stricta" Bouché
* Canna 'Louisiana canna'
* Canna 'Mexicanna'

=Taxonomy=In the last three decades of the 20th century, "Canna" species have been categorised by two different taxonomists, Paulus Johannes Maria Maas from the Netherlands and Nobuyuki Tanaka from Japan. Inevitably, there are differences in their categorisations.

Both agree that "C. glauca" is a distinct species, but in addition, Tanaka also recognises a separate variety.

"Canna glauca" var. "glauca" L.

It is aquatic species, with narrow, blue-green (glaucous) leaves, atop of which sit its large, delicate, pale yellow flowers. It grows as a marginal plant in up to about 15cm of still or slow-moving water.

Canna glauca var. angusta J.W.Richardson

No description available.

Canna glauca var. flava (Michx. ex Lam.) Willd.

No description available.

Canna glauca var. rubrolutea Hook.

No description available.

Canna glauca var. rufa Hook.

No description available.

"Canna glauca" var. "siamensis" (Kraenzl) Nb. Tanaka, 2001

This is a contentious variety as it occurs widely in South and Southeast Asia, where it is supposed to have differentiated within the past few centuries.

=Cultivation=The species prefers light (sandy), medium (loamy) and heavy (clay) soils and requires well-drained soil. The preferred soil is acid, neutral and basic (alkaline). It cannot grow in the shade and requires moist soil.

Notes

References

* Cooke, Ian, 2001. The Gardener's Guide to Growing cannas, Timber Press. ISBN 0-88192-513-6
* Johnson's Gardeners Dictionary, 1856
* Tanaka, N. 2001. Taxonomic revision of the family Cannaceae in the New World and Asia. Makinoa ser. 2, 1:34–43.

=External links=
* [http://www.kew.org/wcsp/prepareChecklist.do Kew Gardens, Checklist of plant families]
* [http://www.kew.org.uk/spectrum/163.shtml Royal Botanic Gardens, Kew: New Views: Language of Flowers: Canna glauca]
* [http://www.botany2001.org/section12/abstracts/111.shtml PRINCE, LINDA M.* and W. JOHN KRESS. Smithsonian Institution, NMNH - Botany, MRC-166, Washington, DC 20560-0166. - Species boundaries in Canna (Cannaceae): evidence from nuclear ITS DNA sequence data.]

=See also=
* Canna
* List of Canna species
* List of Canna cultivars