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Triumfetta rhomboidea

Jacq. (1760)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Rosids Order: Malvales Family: Malvaceae Genus: Triumfetta

bur bush, burr bush

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Description

Key Characters:

Growth Form: Perennial herbs or subshrubs up to ca. 10 dm tall.

Stems: Stems usually erect, densely stellate pubescent.

Roots:

Leaves: Leaves simple. Alternate. Blades broadly ovate to rhombic 3–11(–20) cm long, 1.5–6(–12) cm wide. Apex acuminate. Base cuneate. Surfaces stellate pubescent; lower surfaces more densely so, especially on the veins. Margins crenate–serrate, usually shallowly 3-lobed or 5-lobed. Three-veined from base. Petioles 1–6 cm long. Stipules present.

Flowers: Flowers few in axillary cymes, +/- with an involucel subtending the calyx, the bracts distinct or basally connate. Flowers bisexual (perfect). Calyx of 5 sepals, narrowly oblong, 4.5–5.5 mm long, sparsely stellate pubescent, apex hooded, appendaged near apex, valvate in bud. Corolla actinomorphic to moderately zygomorphic, tubular to rotate or reflexed. corolla of 5 petals, yellow, narrowly obovate to oblanceolate, 3–4.5 mm long, distinct from each other but adnate at base to staminal column, convolute in bud. Stamens 10–15, monadelphous, forming a staminal column; filaments terminating the staminal column or borne below a 5-dentate apex; anthers monothecal. Pollen globose, echinate. Ovary superior, 2-5-celled; ovules 2 per cell, the carpels borne in a single whorl or rarely seemingly superposed whorls, placentation axile; style exceeding the staminal column, unbranched and stigmatically lobed at apex or branched, filiform; stigma 2-5-toothed, terminal or decurrent.

Fruit: Capsules globose; indehiscent; ca.5 mm in diameter; tomentose; covered with glabrous; hooked bristles. Seeds 1-2; when 2; separated by a false partition; reniform to turbinate; with or without endosperm.

Ploidy: 2n = 32; 48

Habitat: In dry disturbed areas; and pastures.

Elevation Range: 5–760 m.

Historical Distribution

Images

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Uses and Culture

USES

Natural History

Statewide Status

Naturalized

Island Status

O'ahu Naturalized
Molokai Potentially naturalizing
Maui Potentially naturalizing
Hawai'i Naturalized

Dispersal Agents


Pollinators

Notes

  • 5 - 760 m
  • Description digitized by Rafael DOmingo
  • Description digitized from the Manual of the Flowering Plants of Hawaii
  • Oahu 1895
  • also known as burrbush

Bibliography

Name Published In: Enum. Syst. Pl.: 22 (1760)

Other References

Wagner et al. 1990:1292 (O, Mo, H); St.John 12757 BISH (Mo†, 1932)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Triumfetta rhomboidea Pali Hwy and Quarry Rd At site of former Kailua nursery. Preserved_Specimen Smith, L.B. 134 Oahu BISH 1976-06-22
2 Triumfetta rhomboidea Honolulu arid pasture Preserved_Specimen Degener, O. 550 Oahu BISH 1923-07-10
3 Triumfetta rhomboidea Kaneohe Bay Lightly shaded edge of pasture along Kam Hwy. Preserved_Specimen Shrub with yellow flowers. Herbst, D.R. 5345 Oahu BISH 1975-06-02
4 Triumfetta rhomboidea N. base of Puu Olomana, Kailua Lantana covered slope. Preserved_Specimen Suffrutescent bush up to 1 m. tall. Fls. Yellow Fosberg, F.R. 9021 Oahu BISH 1932-11-13
5 Triumfetta rhomboidea Kona, along highway between Keauhou Bay and Mamalahoa Hwy pasture land Preserved_Specimen shrub, flws. yellow Herbst, D.R. 5381 Hawaii BISH 1975-06-24
6 Triumfetta rhomboidea Kaneohe Bay Sunny, dry roadside Preserved_Specimen Degener, O. 10782 Oahu BISH 1923-03-18
7 Triumfetta rhomboidea Foot of Olomana Needle Preserved_Specimen common Degener, O. 10785 Oahu BISH 1929-03-03
8 Triumfetta rhomboidea along the road to Kona, Puu Hinai paddock, Waimea, S.Kohala Preserved_Specimen 2-4' tall, branching, fls. yellow Hosaka, E.Y. 2063 Hawaii BISH 1938-05-23
9 Triumfetta rhomboidea Hamakua Marsh; Kailua, mauka (mountainside) of Hamakua Drive Large shrub upland from marsh growing with Prosopis, Schinus & various grasses. Preserved_Specimen Imada, C. 925 Oahu BISH 1992-04-04
10 Triumfetta rhomboidea along the road to Kona, Puu Hinai paddock, Waimea, S.Kohala Preserved_Specimen 2-4' tall, branching, fls. yellow Hosaka, E.Y. 2063 Hawaii BISH 1938-05-23
11 Triumfetta rhomboidea Foster Gardens Preserved_Specimen Fls. yellow Foster Garden staff Oahu BISH 1962-05-16
12 Triumfetta rhomboidea Nuuanu Valley Preserved_Specimen Forbes, C.N. 1629 Oahu BISH 1911-01-04
13 Triumfetta rhomboidea Hauula Preserved_Specimen Forbes, C.N. 2380 Oahu BISH 1916-06-01
14 Triumfetta rhomboidea Honolulu, in Nuuanu Preserved_Specimen Heller, A.A. 2293 Oahu BISH 1895-11-06
15 Triumfetta rhomboidea unknown Preserved_Specimen BISH
16 Triumfetta rhomboidea Kona Preserved_Specimen Jaggar, Mrs.T. 11138 Hawaii BISH 1936-12-01
17 Triumfetta rhomboidea Kahana Preserved_Specimen Rock, J.F.C. 775 Oahu BISH 1908-12-03
18 Triumfetta rhomboidea Waiahole trail Preserved_Specimen Kerr, M. 4 Oahu BISH 1946-12-30
19 Triumfetta rhomboidea on bank on roadside on east side of Oahu between Kahana Bay Preserved_Specimen Wilder, G.N. 43 Oahu BISH 1950-04-05
20 Triumfetta rhomboidea Honolulu Preserved_Specimen Faurie, A. 841 Oahu BISH 1909-04-01
21 Triumfetta rhomboidea Kaneohe, roadside Preserved_Specimen Forbes, A. Oahu BISH 1930-01-12
22 Triumfetta rhomboidea Kailua Preserved_Specimen A.P.M. Oahu BISH 1947-03-05
23 Triumfetta rhomboidea Waiahole Preserved_Specimen (Not on sheet) Oahu BISH 1945-12-30
24 Triumfetta rhomboidea Oahu Preserved_Specimen Forbes, C.N. Oahu BISH 1933-07-21
25 Triumfetta rhomboidea Kailua Preserved_Specimen Wilder, G.P. Oahu BISH 1930-11-11
26 Triumfetta rhomboidea Honolulu, Manoa Valley, Woodlawn Preserved_Specimen Wilder, G.P. Oahu BISH 1930-11-23
27 Triumfetta rhomboidea unknown Preserved_Specimen Hillebrand, W.B. BISH
28 Triumfetta rhomboidea Kailua Preserved_Specimen Degener, O. 7121 Oahu BISH 1928-10-31
29 Triumfetta rhomboidea Mapulehu Valley roadside, edge of cultivated field Preserved_Specimen St.John, H. 12757 Molokai BISH 1932-12-28
30 Triumfetta rhomboidea N. of Nuuanu Pali arid and waste regions Preserved_Specimen Degener, O. 551 Oahu BISH 1922-10-29
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