Saturday, January 16, 2010

Colocasia

Alocasia
Prefers moist organic soil. In cool climates, a thick winter mulch is recommended.
They are not salt tolerant. Pests and disease problems are rare. Some of the more abundant species of Alocasia are commonly sold in Florida as canned plants, less frequently elsewhere.

* photos of unknown internet source


* photo taken on July 11 2014 @ Smithsonian Inst., Washington, DC

* photo taken on Oct 21 2014 @ Smithsonian Inst., Washington, DC


Alocasia culcullata
Reaches up to 3 feet, with leaves, up to 16 x 12 inches borne on a stalk up to 3 feet in length.

Alocasia cuprea
Native to tropical forests of Malaysia and Borneo, it is a rhizomatous perennial, reaching up to 4 x 4 feet.
The oval leaves, up to 18 inches in length, are metallic-purple. The leaves are borne on thick stalks up to 2 feet in length.
Hardy zones 1o to 12 inc partial shade. It requires high humidity.

Alocasia gageana
Reaches up to 8 feet in height with massive leaves, up to 6 feet in length.

Alocasia gigantea
Reaches up to 6 feet, with large leaves, up to 4 feet in length.
Hardy zones 7 to 11

Alocasia macrorhiza ( Giant Elephant Ears )
A large evergreen shrub, reaching a maximum size of 17 x 16 feet with a trunk diameter of up to 15 inches, that is native to southern Asia incl. India, Sri Lanka, Malaysia and Indonesia. Plants are fast growing, reaching up to 10 feet in the first year.
The massive, thick, heart-shaped leaves, up to 10 x 6.5 feet, are borne on thick stalks up to 7 feet in length. The foliage is glossy green.
Hardy zones 9 ( 7b to 8 ) in full sun to partial shade on moist, fertile, well drained soil.

* photo taken on Aug 3 2014 @ U.S. National Zoo, Wash., DC

* photo of unknown internet source


'Borneo Giant'
Fast growing, reaching up to 15 feet with huge leaves up to 5 feet across.

Alocasia odora
Reaches up to 15 ( rarely 25 ) feet with massive leaves, up to 4.3 x 4 feet, borne on long thick stalks up to 12 feet in length.
Fast growing, plants can reach a height of 3 feet in the first year.
Hardy zones 7 to 10

* photo taken on June 10 2013 in Columbia, MD


Alocasia 'Pandora'

* photo taken on October 17 2010 @ U.S. National Arboretum, D.C.



Alocasia plumbea 'Nigra'

* photo taken on June 10 2013 in Columbia, MD


Alocasia 'Portodora'
The hybrid between Alocaris odora & A. portel, forming clumps of huge heavily-scalloped, lush, mid-green foliage on muscular purple stocks.

Alocasia robusta
Huge leaves up to 14.8 x 8 feet in size, making this the worlds largest undivided leaf.

Alocasia wentii
Native to the highlands of New Guinea, it forms tight clumps of heavily-veined leaves, up to 12 x 8 inches, that are glossy bronze-green above, purple beneath.
Should be hardy in the British Isles.

Colocasia

* photo taken on Aug 20 2011 @ Brookside Gardens, Wheaton, MD


Colocasia esculenta ( Taro )
A perennial forming a clump, up to 7 x 6 feet, that is native to Sri Lanka.
The Taro is very fast growing, reaching a height up to 6 feet in the first year.
It is grown as a commercial crop in parts of the tropics. In tropical climates it is evergreen.
The large, cordate, arrowhead-shaped leaves, up to 3 x 1 feet, are borne on thick stalks up to 40 inches in length. The foliage is bright green. There are few landscape plants that do a better job adding a tropical effect to the landscape.
The flower spaethes are up to 15 inches in length.
Hardy zones 10+ as an evergreen perennial; zones 7b to 9 as a herbaceous perennial ( mulch during winter ). Taro prefers full sun and loves heat and moisture, it can even be grown in a shallow pond.
PHARMACOLOGY: The tuber is edible but only after steeping in cold water overnight or cooking. They can be peeled and boiled.
The foliage is NOT edible.

* photo of unknown internet source


'Big Dipper'
Reaches up to 6 feet with huge matte gray-green leaves borne on purplish-black stems.
Hardy zones 7 to 10 ( 6 with protection ).

'Black Coral'
Reaches up to 4 x 3 feet with heavily-corrugated, very glossy black foliage.
Hardy zones 7b to 11.

'Black Magic'
Forms a rapid spreading clump, up to 7 x 7 ( rarely over 6 ) feet, with arrow-shaped leaves, up to 25 x 16 inches in size. The foliage is deep plum-purple.
Rapid spreading with deep plum-purple foliage.
Hardy north to zone 7b to 9

'Black Pearl'
Hardy north to zone 6 ( even 5 on protected sites )

'Black Ruffles'
Very fast growing, reaching up to 6 x 5 feet.
Hardy north to zone 8.

'Black Runner'
Similar to 'Black Magic' but has runners that creep along the ground to form new plants. Reaches up to 6 feet in height.

'Coal Miner'
Reaches up to 4.5 feet with foliage that is very similar to that of "Illustris" but emerges as much as 2 months earlier in spring.



'Coffee Cups'
Stunning and fast growing, reaching up to 6 x 6 feet, with large cup-shaped leaves that are olive-green and borne on a thick black stalk.
Thrives in partial shade or where summer heat isn't too intense - full sun.
During autumn; it sends out above ground runners as a means of spreading.

* photo taken on 4th of July @ U.S. National Arboretum, D.C.


'Diamond Head'
Fast growing, reaching up to 7 feet with massive beautiful glossy blackish-purple leaves, up to 3 feet in length.

* photos taken on October 17 2010 @ U.S. National Arboretum, D.C.



* photo taken on October 24 2010 in Washington, D.C.

* photo taken on Aug 15 2014 @ Rawlings Conservatory, Baltimore, MD


'Elena'
Reaches up to 6 x 6 feet with bold foliage that is bright yellow at first, later turning to yellow-green. The leaves are up to 20 inches long. Looks great with deep purple to black foliaged Colocasias for contrast.
Hardy zones 7b +

* photo taken on 4th of July @ U.S. National Arboretum, D.C.



'Illustris' ( Imperial Taro )
Similar to 'Black Magic' reaching up to 6 x 6 feet, with polished, metallic purple leaves, up to 3 feet in length.
Hardy north to zone 7.

* photo taken on June 10 2013 in Columbia, MD


'Mojito'
Reaches up to 4 x 4 feet, with bright green foliage that is blotched and speckled deep purple.
Hardy north to zone 8 ( 7b on protected sites with deep winter mulch ).

'Noble Gigante'
A cultivar of Colocasia gigaqntea with huge blackish-purple leaves with a purplish-blue sheen in full sun, softer purple with a green tint in the shade.
It is extremely vigorous, reaching up to 8 x 8 feet in just 1 year.
Hardy zones 8 to 11, it prefers afternoon shade.

'Pink China'
Reaches up to 8 feet with large jade green leaves borne on thick red stems.
Hardy zones 6 to 10 ( 4 and 5 on protected sites with winter mulch ).
This is the hardiest of the Colocasias.

'Imperial'
Foliage is light green and marked blue-black between the primary veins.

'Variegata'
Foliage is deep green and blotched with creamy-white.

'Violacea'
Foliage is tinged with violet.

Colocasia gigantea
Reaches up to 8 feet with huge leaves, up to 5 x 3 feet, that are pale green above, white beneath. Native to Malaysia.
Hardy zones 10 to 12

'Thailand Giant Strain'
The "Colocasia on Steroids" reaching up to 9 x 9 or rarely even 20 x 12 feet!
On ideal sites, this plant can spread up to 12 feet in just 3 years.
The massive leaves, up to 5+ x 5 feet are glaucous green.
The dramatic large flowers are white and fragrant.

* photo taken on Aug 20 2011 @ Brookside Gardens, Wheaton, MD

* photo tsken on Oct 17 2013 in Columbia, MD


Colocasia - Tropical Species

* photo taken on 4th of July @ U.S. National Arboretum, D.C.


Xanthosma

Xanthosma sagittifolia
Reaches up to 9 feet with glossy green leaves, up to 5 feet in length.

Xanthosma 'Lime Zinger'
Very vigorous, reaching up to 6 x 6 feet in just 1 summer with massive, intense lime-green leaves, up to 2 feet in length.
Hardy zones 9 to 10 in sun or partial shade on moist, fertile, acidic soil.

Xanthosma 'St. Mary's Giant'
Reaches up to 5 x 5 feet, with leaves up to 3 feet in length.
Hardy north to zone 10

Xanthosma violaceum ( Blue Taro )
Huge leaves, up to 4 feet in length, borne on thick purple stems up to 7 feet in length. The foliage is purple at first, turning to sea-green.

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