Dubautia

Gaudich. (1830)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Asterids Order: Asterales Family: Asteraceae Genus: Dubautia

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Description

Key Characters:

Growth Form:

Stems:

Roots:

Leaves: Leaves simple. Alternate, opposite, or whorled. Base attenuate.

Flowers:

Fruit:

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Accepted Subtaxa (in Hawai'i) (71)

Dubautia arborea (A.Gray) D.D.Keck

Dubautia arborea × Dubautia ciliolata

Dubautia carrii B.G.Baldwin & Friar

Dubautia carrii × Dubautia scabra subsp. leiophylla

Dubautia ciliolata (DC.) D.D.Keck

Dubautia ciliolata subsp. ciliolata × Dubautia scabra subsp. scabra

Dubautia ciliolata × Dubautia linearis

Dubautia ciliolata × Dubautia scabra subsp. scabra

Dubautia hanaulaensis B.G.Baldwin

Dubautia hanaulaensis × Dubautia plantaginea subsp. plantaginea

Dubautia haupuensis B.G.Baldwin & K.R.Wood

Dubautia herbstobatae G.D.Carr

Dubautia imbricata H.St.John & G.D.Carr

Dubautia imbricata subsp. acronaea × Dubautia laxa subsp. hirsuta

Dubautia imbricata subsp. acronaea × Dubautia paleata

Dubautia imbricata subsp. acronaea × Dubautia waialealae

Dubautia imbricata × Dubautia waialealae

Dubautia kalalauensis B.G.Baldwin & G.D.Carr

Dubautia kalalauensis × Dubautia laevigata

Dubautia kenwoodii G.D.Carr

Dubautia knudsenii Hillebr.

Dubautia knudsenii subsp. filiformis × Dubautia laxa subsp. hirsuta

Dubautia knudsenii subsp. knudsenii × Dubautia laevigata

Dubautia knudsenii subsp. knudsenii × Dubautia raillardioides

Dubautia knudsenii × Dubautia laxa subsp. hirsuta

Dubautia laevigata A.Gray

Dubautia latifolia (A.Gray) D.D.Keck

Dubautia laxa Hook. & Arn.

Dubautia laxa subsp. hirsuta × Dubautia paleata

Dubautia laxa subsp. hirsuta × Dubautia pauciflorula

Dubautia laxa subsp. laxa × Dubautia scabra subsp. leiophylla

Dubautia laxa × Dubautia paleata

Dubautia laxa × Dubautia scabra

Dubautia linearis (Gaudich.) D.D.Keck

Dubautia linearis subsp. linearis × Dubautia menziesii

Dubautia linearis × Dubautia scabra

Dubautia menziesii (A.Gray) D.D.Keck

Dubautia menziesii × Dubautia platyphylla

Dubautia menziesii × Dubautia scabra

Dubautia menziesii × Dubautia waianapanapaensis

Dubautia microcephala Skottsb.

Dubautia microcephala × Dubautia plantaginea subsp. magnifolia

Dubautia paleata A.Gray

Dubautia paleata × Dubautia waialealae

Dubautia pauciflorula H.St.John & G.D.Carr

Dubautia pauciflorula × Dubautia raillardioides

Dubautia plantaginea Gaudich.

Dubautia plantaginea subsp. plantaginea × Dubautia scabra subsp. leiophylla

Dubautia plantaginea subsp. plantaginea × Dubautia sherffiana

Dubautia plantaginea subsp. plantaginea × Dubautia waianapanapaensis

Dubautia plantaginea × Dubautia waianapanapaensis

Dubautia platyphylla (A.Gray) D.D.Keck

Dubautia platyphylla × Dubautia reticulata

Dubautia raillardioides Hillebr.

Dubautia reticulata (Sherff) D.D.Keck

Dubautia reticulata × Dubautia scabra

Dubautia reticulata × Dubautia waianapanapaensis

Dubautia scabra (DC.) D.D.Keck

Dubautia scabra subsp. leiophylla × Dubautia plantaginea

Dubautia sherffiana Fosberg

Dubautia syndetica G.D.Carr & Lorence

Dubautia waialealae Rock

Dubautia waianapanapaensis G.D.Carr

Dubautia × coriacea (Sherff) D.D.Keck

Dubautia × demissifolia (Sherff) D.D.Keck

Dubautia × lonchophylla (Sherff) D.D.Keck

Dubautia × media Sherff

Dubautia × mendax Sherff

Dubautia × montana (H.Mann) D.D.Keck

Dubautia × rockii (Sherff) D.D.Keck

Dubautia × struthioloides (A.Gray) D.D.Keck

Uses and Culture

USES

Roots used to scent kapa (Handy et al 1972:237).

PROPAGATION/CULTIVATION

Dubautia seeds are small, varying in size from 1/16 to 1/4 inch in length. Air dry the seed heads at room temperature in a bowl or paper bag. Carefully rub the fruits through a strainer with the appropriate size mesh. The seeds should fall through leaving the debris in the strainer. (Lilleeng-Rosenberger 1998)
In his work, Carr soaked seeds of a variety of Dubautia species in water and germinated them on wet filter paper. Species that he grew from seed include: Dubautia arborea; D. ciliolata; D. knudsenii; D. laxa; D. linearis subsp. linearis and subsp. opposita; D. menziesii; D. microcephala; D. platyphylla; D. raillardioides; D. scabra; and, D. sherffiana. He added a small amount of fungicide (Bordeaux mix) to the papers.
Carr indicated that many Dubautia species produce large numbers of infertile fruits resulting in low germination rates. His work showed that removal of the seed coat decreased germination time. He reports that fresh seeds with undamaged embryos can germinate within a few days. Lilleeng-Rosenberger's notes (1996) document germination times of about 1 month and very low germination rates ranging from 6% yo 41% for Dubautia latifolia. (Carr 1979; Lilleeng-Rosenberger 1996; Wagner 19901)
Carr rooted cuttings of a number of Dubautia species in sponge rock (perlite) under intermittent mist in a greenhouse. Rooting hormone (Rootone-F) was applied to the cuttings. The percentage of the cuttings which rooted and the time it took them to root varied quite a bit between the various species. Of the species he worked on, Dubautia scabra rooted the most quickly and Dubautia latifolia was the most difficult. Cuttings of Dubautia latifolia often took weeks to root. The other Dubautia species that Carr grew from cuttings were: Dubautia herbstobatae; D. knudsenii; D. laevigata; D. laxa; D. linearis subsp. linearis and subsp. opposita; D. menziesii; D. microcephala; D. montana (Wagner et al considers this to be a natural Dubautia hybrid); D. paleata; D. plantaginea; D. platyphylla; D. raillardioides; D. sherffiana; and, D. wainapanapaensis (now called D. dolosa).
Woolliams also reported some success with rooting Dubautia knudsenii. He found that use of rooting hormones increased the number of cuttings that rooted and that treating cuttings had longer roots than untreated ones. (Carr 1979; Woolliams 1972) [Data from Herring, E. C., & Criley, R. A. (2003). The Hawaiian Native Plant Propagation Web Site: Developing a Webbased Information Resource. HortTechnology, 13(3), 545-548. https://www.ctahr.hawaii.edu/hawnprop/]

Natural History

Island Status

Dispersal Agents

Pollinators

Specimens

Conservation Status

Bibliography

Name Published In: Voy. Uranie: 469 (1830)

Occurrences

SNo.	Scientific Name	Locality	Habitat	Basis of Record	Recorded By	Record Number	Island	Source	Date

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