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Horticulture Digest

Date Last Edited:  08/24/2001


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Hawaii Cooperative Extension Service


Horticulture Digest #99
'ALII' AND 'RUDOLPH' ANTHURIUM

Evaluation of two anthurium selections with cooperating growers in East Hawaii was completed. UH908 with light red spathe was named 'Alii,' and UH965 with white spathe and red spadix was named 'Rudolph'. The characteristics of the cultivars are given in Table 1.


'Alii' (UH908)

'Alii' originated from a cross between UH515 and 'Paradise Pink' made on May 28, 1978. The seedling was selected on July 28, 1980 for observation and evaluation and placed in aseptic culture in 1983. Tissue-cultured plantlets were transferred to cooperat ors for advance testing in 1985. Unfortunately, this selection is susceptible to bacterial blight, and most of the plants originally tested with cooperators succumbed to the disease.

More recently, one of the cooperators has been re-evaluating this selection in a plastic covered house. Bacterial blight of 'Alii' under the moisture-controlled greenhouse was greatly minimized. Also, several young plants started from presumably bacteri a-free tissue-cultured plants have been performing relatively well under saran shade.

The major attributes of 'Alii' are (Table 1):

  • attractive, large, light red spathe
  • high yield of about 7 flowers per plant per year
  • resistant to anthracnose
  • internodes are short.

Its major weakness is susceptibility to bacterial blight.
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'Rudolph' (UH965)

'Rudolph' has many cultivars in its pedigree that are common to 'Alii'. It was originally selected on January 27, 1981 from a cross made on April 15, 1978. After a period of evaluation, it was placed in aseptic culture in 1985 for advance testing. Tissue- cultured plantlets were transferred to cooperators in 1989. The performance of this selection has been satisfactory.

The major attribute of this cultivar is (Table 1):

  • attractive white spathe with a contrasting red spadix
  • yield, like 'Alii', is excellent
  • it is resistant to anthracnose
  • flower stem is straight and sturdy, and the internodes are short.

Its weakness is susceptibility to bacterial blight. It also turns slightly obake with light green lobes during the spring months.
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Table 1. Characteristics of 'Alii' and 'Rudolph.'


Characteristics                'Alii'                              'Rudolph'

Scape
    Size and Shape     Heart-shape, overlapping         Heart-shape, overlapping lobes
                       basal lobes, sometimes           sometimes turning slight obake;
                       keeled at base; 7" long,    6 1/4" long, 4 3/4" wide, carried
                       5" wide; carried about 45  about 45 from flower stem
                       from flower stem axis.           axis.

    Color              Light Red (RHSCC* 45B)           White, sometimes developing a
                                                        pink blush and light green lobes.
Spadix
    Size and Shape     3 1/2" long, 1/2" diameter;      3" long, 3/8" diameter; reclining
                       reclining.

    Color              Light orange (RHSCC 25B),        Red (RSHCC 44B), turning purplish
                       turning white with maturity.     with maturity.

    Anthracnose        Resistant.                       Resistant.

Flower Stem            Erect, 21" long, 3/8" diameter.  Erect, 24" long, 3/8" diameter.

Yield                  7.1 flowers per plant per year.  6.9 flowers per plant per year.

Leaf
    Blade              14 1/2" long, 8 1/2" wide,       16" long, 8 1/2" wide; heart-
                       heart-shape with lobes           shape with lobes slightly
                       slightly overlapping.            overlapping.

    Petiole            25" long, 1/4" diameter.         26" long, 1/4" diameter.

Internode              Short.                           Short.

Sucker Production      Poor.                            Moderate.

Bacterial Blight       Susceptible.                     Susceptible.


* Royal Horticultural Society Colour Chart.


H. Kamemoto, haruyuki@hawaii.edu
A. R. Kuehnle, heidi@hawaii.edu
J. T. Kunisaki, jkunisak@hawaii.edu
M. Aragaki, T. Higaki, and J. Imamura-Lichty

Dept. of Horticulture

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