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Helichrysum 'Helping Hand'

Helichrysum elatum 'Helping Hand'

syn. Helichrysum aff. elatum (Mount Warning form)
[see note on genus name below]

ORIGIN: Helichrysum 'Helping Hand' is a form of Helichrysum elatum. The name is in recognition of the work done by volunteers in public institutions around Australia and it will be first released commercially in the International Year of the Volunteer 2001. It is one of several compact forms of the species growing in the ranges along the NSW and Queensland border and around Jervis Bay on the NSW south coast (see diagnosis below). The applicant is the Australian National Botanic Gardens. The form has been in cultivation at ANBG since 1996. Specimen received by ACRA September 2000

DESCRIPTION: Shrub ca. 100x100cm. Upper branches tomentose. Leaves lanceolate, 5-7cm long x 2-3cm wide; apex acute/acuminate; margins entire; upper leaf surface grey green, tomentose; lower surface grey green/whitish, tomentose; leaf veins on upper surface obscured by tomentum. Flower bracts glossy white, disc yellow. Flower head diameter ca. 4cm. Inflorescences in terminal leafy corymbs of up to 6 heads. Outer involucral bracts to 20mm long, reducing in size outwards. Inner involucral bracts lacerate. (Note: The description and diagnosis have been compiled from cultivated plants).

DIAGNOSIS: The primary distinguishing features from the other compact forms of H. elatum are the leaf upper surface tomentum and lack of visible veins, the larger head diameter and longer bract laminas.

Character

H. elatum

H. elatum (Jervis Bay compact form)

H. aff. elatum (Mt Merino form)

H. aff. elatum (Point Lookout form)

H. 'Helping Hand'

height

60 - 200cm

50 -60cm

to 100 cm

to 100cm

to 100cm

leaf length

8-12cm

6-8cm

3.5-7cm

5-10cm

5-7cm

leaf width

15-30mm

12-20mm

15-40mm

20-35mm

20-30mm

leaf apex

acute/acuminate

acute/acuminate

acute to +-obtuse

acute/acuminate

acute/acuminate

leaf margins

entire or crenulate

entire or crenulate

entire

entire

entire

leaf upper surface

mid green glabrescent woolly ciliate

mid green glabrescent woolly ciliate

mid green (137A) glabrescent woolly ciliate

grey green (191A)

woolly ciliate to tomentose

grey green (191A-B) tomentose

leaf veins (upper surface)

veins visible

veins visible

veins visible

(3 prominent)

visible through tomentum (3 prominent)

obscured by tomentum

head diameter

3-5cm

2-3cm

1.5-2cm

ca 2cm

ca.4cm

inflorescence

terminal leafy corymbs 4-9 heads

terminal leafy corymbs 4-11 heads

terminal leafy corymbs 2-3 heads

terminal leafy corymbs3-4 heads

terminal leafy corymbs 2-6 heads

outer involucral bracts

long papery laminas, reducing in size outwards

long papery laminas, reducing in size outwards, 12-15mm long

long papery laminas, reducing in size outwards, 12-15mm long

long papery laminas, reducing in size outwards,

up to 20mm long

Flowering time (relative)

late winter - spring

(early)

late winter / spring (early)

spring - early summer (late)

spring (mid-season)

spring (mid-season)

Seed maturity

late spring/early summer

early summer?

early summer

late spring/early summer

late spring/early summer

Natural habitat

sandstone ridges

sandstone ridges

basalt peaks and ridges

basalt peaks and ridges

basalt peaks and ridges

COLOUR CODE: (RHS 1995)

Leaf upper surface 191A-B

Leaf lower surface 191D

Involucral bracts glossy white (no RHS equivalent)

CULTIVATION: Propagate by cutting or from seed (it grows true to type). Treat as a biennial. Plant in well drained soil and allow the foliage to dry between watering. Susceptible to Verticillium and soil borne fungi and bud and leaf caterpillars.

ACRA REFERENCES: ACC910; ACRA910.

ACCEPTED FOR REGISTRATION ON: 12 August 2002

The 'Helichrysum elatum' group [includes H. elatum, H. boormanii and H. adenophorum] needs generic revision. We now know that the genus Helichrysum does not occur in Australia (Anderberg 1992; Wilson op.cit.), and new generic combinations have been made in Lawrencella, Bellida, Schoenia, Argentipallium Bracteantha, Anemocarpa and Leucochrysum. Wilson has not yet recommended new name combinations for this group of [remaining] taxa at this stage..