img

Isodendrion hosakae

H.St.John (1952)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Rosids Order: Malpighiales Family: Violaceae Genus: Isodendrion

aupaka

img

Description

Key Characters:

Growth Form: Branched shrubs 3–8 dm tall.

Stems: Branches pilose (hairs antrorse), leafy at apex to ca. 20 cm below.

Roots:

Leaves: Leaves simple. Alternate. Blades narrowly elliptic to lanceolate, 3–7 cm long, 0.6–2 cm wide. Apex acute to slightly acuminate. Base attenuate. Blades coriaceous. Margins crenulate–serrulate, margins whitish ciliate. Conspicuously reticulate-veined; veins of upper surface slightly impressed, those of lower surface slightly raised, sparsely appressed pilose, at least along veins. Petioles 0.3–1.2 cm long, appressed whitish pilose (hairs antrorse). Stipules slightly asymmetrical, ovate, 2.5–4mm long, the raised, thickened midrib appressed whitish puberulent, becoming noticeably brownish dry and membranous toward margins.

Flowers: Flowers solitary; peduncles whitish puberulent, 2–8 mm long. Flowers fragrant, bisexual (perfect), axillary, on short pedicels; pedicels whitish puberulent, 2–4 mm long, bracts 2.3–3.2 mm long. Calyx of 5 sepals, lanceolate, 4.5–6 mm long, becoming membranous toward the whitish ciliate margins. Corolla of 5 petals, greenish yellow, upper petals ca. 14–15 mm long, the lobes ca. 5.5 mm long, lateral petals ca. 14–16 mm long, the lobes ca. 6 mm long, lower petal 16–18 mm long (as short as 12 mm long when dried), the lobe ca. 7 mm long, creased down the middle. Stamens 5, subequal; filaments ca. 1.3 mm long; anthers ca. 1.2–1.3 mm long, connective of abaxial Stamens prolonged into an apiculate appendage; anthers dithecal, opening by longitudinal slits. Ovary superior, 3-carpellate, 1-celled, placentation parietal; ovules anatropous; style 1, filiform, sigmoid, apex enlarged and excavated.

Fruit: Capsules green; tinged dull red; ellipsoid; 3–valved; 12–16 mm long; tipped with the persistent style. Seeds olive with a dark spot near the middle; obovoid; 2.8–3 mm long; ca. 2 mm in diameter; with fleshy; oily endosperm.

Ploidy:

Habitat: Occurring in dry shrubland dominated by <i>Dodonaea</i>; <i>Sophora</i>; <i>Wikstroemia</i>; and <i>Santalum</i>.

Elevation Range: 900–1030 m.

Historical Distribution

Images

img

Uses and Culture

USES

Natural History

Statewide Status

Endemic

Island Status

Hawai'i Endemic

Dispersal Agents


Pollinators

Notes

  • 900-1,030 m
  • Description digitized by Ellena Ruiz
  • Description digitized from the Manual of the Flowering Plants of Hawaii

Bibliography

Name Published In: Pacific Sci. 6: 226 (1952)

Other References

Wagner et al. 1990:1328 (H)

Occurrences

SNo. Scientific Name Scientific Name Authorship Locality Habitat Basis of Record Recorded By Record Number Island Source Date
1 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN Tim Flynn 774 Hawaii PTBG 2/29/1984
2 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN e. y. hosaka 3593 Hawaii US 11/4/1948
3 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN Wagner, W. L.; Miller, S. W.; Flynn, T. W.; Gustafson, R.; Davis, J. 5301 Hawaii US 2/28/1984
4 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information Ash Substrate. Growing with Dodonaea, Styphelia, Pennisetum setaceum, ans Carex wahuensis var. rubiginosa. PRESERVED_SPECIMEN Clarke, G. Collector Number: 80.325 Hawaii BISH 3/20/1980
5 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN Hosaka, E. Y. 3593 Hawaii US 11/4/1948
6 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information On cinder cone with Dodonaea, Styphelia, Sophora, Santalum. Windswept north facing slope. PRESERVED_SPECIMEN corn, c. collector number: s.n. Hawaii BISH 6/3/1980
7 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN Wagner, W.L. 5301 Hawaii BISH 2/28/1984
8 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information Native scrub of Dodonaea, Styphelia, Osteomeles, few Santalum and Sophora chrysophylla. Fountain grass common. PRESERVED_SPECIMEN Clarke, G. 685 Hawaii BISH 4/5/1982
9 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information In native scrub of Dodonaea; Styphelia; Osteomeles & a few Santalum & Sophora chrysophylla; seedlings present PRESERVED_SPECIMEN Clarke, G. 683 Hawaii BISH 4/5/1982
10 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information Ash Substrate. Growing with Dodonaea, Styphelia, Pennisetum setaceum, ans Carex wahuensis var. rubiginosa. PRESERVED_SPECIMEN Clarke, G. 80.325 Hawaii BISH 3/20/1980
11 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information Ash Substrate. Growing with Dodonaea, Styphelia, Pennisetum setaceum, ans Carex wahuensis var. rubiginosa. PRESERVED_SPECIMEN clarke, g. collector number: 80.325 Hawaii BISH 3/20/1980
12 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information Native scrub of Dodonaea, Styphelia, Osteomeles, few Santalum and Sophora chrysophylla. Fountain grass common. PRESERVED_SPECIMEN clarke, g. nagata, k. collector number: 685 Hawaii BISH 4/5/1982
13 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information Near top of a cinder cone; associated with Dodonaea viscosa; Wikstroemia; Railliardia menziesii; Bidens filiformis; Sida fallax; & Eragrostis variabilis PRESERVED_SPECIMEN hosaka, e.y. collector number: 3593 Hawaii BISH 11/4/1948
14 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information Associated with Dodonaea viscosa, Wikstroemia, Railliardia menziesii, Bidens filiformis, Sida fallax, and Eragrostis variabilis. PRESERVED_SPECIMEN hosaka, e.y. collector number: 3594 Hawaii BISH 2/3/1949
15 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information In scrub PRESERVED_SPECIMEN st.john, h. collector number: 26953 Hawaii BISH 6/3/1980
16 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN wagner, w.l. mill, s.w.; flynn, t.; gustafson, r.; davis, j. collector number: 5301 Oahu BISH 2/28/1984
17 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information North slope of cinder cone, just south of the gulch. PRESERVED_SPECIMEN Corn, C. s.n. Hawaii BISH 1/13/1980
18 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information North slope of cinder cone, just south of the gulch. PRESERVED_SPECIMEN Corn, C. Collector Number: s.n. Hawaii BISH 1/13/1980
19 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information Near top of a cinder cone; associated with Dodonaea viscosa; Wikstroemia; Railliardia menziesii; Bidens filiformis; Sida fallax; & Eragrostis variabilis PRESERVED_SPECIMEN Hosaka, E.Y. 3593 Hawaii BISH 11/4/1948
20 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information In scrub PRESERVED_SPECIMEN St. John, H. 26953 Hawaii BISH 6/3/1980
21 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information Native scrub of Dodonaea, Styphelia, Osteomeles, few Santalum and Sophora chrysophylla. Fountain grass common. PRESERVED_SPECIMEN Clarke, G. Nagata, K. Collector Number: 685 Hawaii BISH 4/5/1982
22 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information In native scrub of Dodonaea; Styphelia; Osteomeles & a few Santalum & Sophora chrysophylla; seedlings present PRESERVED_SPECIMEN clarke, g. nagata, k. collector number: 683 Hawaii BISH
23 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information On cinder cone with Dodonaea, Styphelia, Sophora, Santalum. Windswept north facing slope. PRESERVED_SPECIMEN Corn, C. s.n. Hawaii BISH 6/3/1980
24 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN Hawaii US
25 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN e. y. hosaka NY 11/8/1948
26 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information Dodonaea mixed shrubland. PRESERVED_SPECIMEN K. R. Wood 381 Hawaii PTBG 6/22/1990
27 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN K. R. Wood 548 Hawaii PTBG 1/30/1991
28 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN Steve Perlman 19602 Hawaii PTBG 6/8/2005
29 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information Associated with Dodonaea viscosa, Wikstroemia, Railliardia menziesii, Bidens filiformis, Sida fallax, and Eragrostis variabilis. PRESERVED_SPECIMEN Hosaka, E.Y. 3594 Hawaii BISH 2/3/1949
30 Isodendrion hosakae H.St.John Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN w. l. wagner, s. w. miller, t. w. flynn, r. gustafson & j. davis 5301 CM 2/28/1984
Back to Top