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Geniostoma imadae

K.R.Wood, Lorence & W.L.Wagner (2025)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Asterids Order: Gentianales Family: Loganiaceae Genus: Geniostoma

kāmakahala

Description

Key Characters:

Growth Form: Shrubs or small trees

Stems:

Roots:

Leaves:

Flowers:

Fruit:

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Uses and Culture

USES

Natural History

Statewide Status

Endemic

Island Status

Kaua'i Endemic

Dispersal Agents


Pollinators

Bibliography

Name Published In: PhytoKeys 257: 192 (2025)

Other References

Wood et al. 2025:192 (SPNOV/K, DESCR, KEY)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Geniostoma imadae Koloa District; Lihue-Koloa Forest Reserve. Wahiawa drainage, southwest of Kapalaoa In diverse forest of Metrosideros, Tetraplasandra, Cheirodendron, Psychotria, Labordia, Syzygium, Cyrtandra, Embelia, Antidesma, Scaevola, Bidens, Wikstroemia, Broussaisia, Coprosma, Sadleria, Cibotium, Hedyotis, Diplazium, Athyrium, Marchantia. Preserved_Specimen Small tree of 8 ft. Leaves glossy medium green with pale green midvein and petiole, below faintly greenish-white with pale green midvein and dark green secondary and tertiary veins. Immature fruit glossy greenish-white. Flynn, T.W. 4615 Kauai BISH 1991-04-20
2 Geniostoma imadae Ridge to Mount Kahili Forming east side of Wahiawa Bog; along trail just below microwave relay station Preserved_Specimen Small tree. Herbst, D.R. 2401 Kauai BISH 1972-05-09
3 Geniostoma imadae Iole headwaters. Metrosideros-Cheirodendron mixed wet forest with matting ferns of Diplopterygium & Dicranopteris w/ Touchardia latifolia, Psychotria mariniana, P. hexandra, Antidesma platyphylla, Kadua affinis, Bobea elatior, Syzygium sandwicense, Melicope wawrae Preserved_Specimen Tree, 2.25 m tall, moderately branched w/ immature fruit white, relatively occasional w/ ca. 50+ individuals in the broader area. Wood, K.R. 19365 Kauai BISH 2023-08-10
4 Geniostoma imadae Lihue, Kamooloa below Kapalaoa headwater drainage, wet, wind swept ridge; Metrosideros, Dicranopteris, Machaerina angustifolia, Gahnia beecheyi, Cheirodendron platyphylla, Psychotria mariniana, Dubautia laxa, Broussaisia, Sphenomeris chinensis, Sadleria pallida Preserved_Specimen 3 m tree; stem gray brown; leaves glossy dark green, below white or white green; corolla yellow Wood, K.R. 12819 Kauai BISH 2008-02-21
5 Geniostoma imadae Koloa District; Lihue-Koloa Forest Reserve. Wahiawa drainage, southwest of Kapalaoa In diverse forest of Metrosideros, Tetraplasandra, Cheirodendron, Psychotria, Labordia, Syzygium, Cyrtandra, Embelia, Antidesma, Scaevola, Bidens, Wikstroemia, Broussaisia, Coprosma, Sadleria, Cibotium, Hedyotis, Diplazium, Athyrium, Marchantia. Preserved_Specimen Small tree of 8 ft. Leaves glossy medium green above with pale green midvein and yellow green seconday veins; belo greenish white with darker green secondary veins. Immature fruit greenish-white. Flynn, T.W. 4611 Kauai BISH 1991-04-20
6 Geniostoma imadae Lihue District: Wahiawa Mtns, northeast of Kapalaoa peak, subgulches on east facing side or ridge. Montane Wet Metrosideros-Cheirodendron-Dicranoptes Forest W/ Metrosideros, Polyscias cf. flynnii, Broussaisia arguta, Kadua affinis, Sadleria, Ilex anomala, Eurya sandwicensis, Melicope clusiifolia, Dubautia Preserved_Specimen Sprawling shrub on NE facing side of ridge. Lvs upward arching, shiny bright green above, white below w/ dk green lat venation and raised leaf margins. Bud terminal green, between opp lvs, calyx lobes broadest below middle. Inflo glabrous. Tangalin, N. 3665 Kauai BISH 2014-01-22
7 Geniostoma imadae Lihue, Kamooloa below Kapalaoa headwater drainage, wet, wind swept ridge; Metrosideros, Dicranopteris, Machaerina angustifolia, Gahnia beecheyi, Cheirodendron platyphylla, Psychotria mariniana, Dubautia laxa, Broussaisia, Sphenomeris chinensis, Sadleria pallida Preserved_Specimen 3-4 m tree; stems brown; corolla yellow Wood, K.R. 12802 Kauai BISH 2008-02-21
8 Geniostoma imadae Wahiawa mts., near Kapalaoa summit, south of peak off ridge between Hanapepe valley and Wahiawa drainage, east facing pocket off ridge crest. In Metrosideros forest- Dicranopteris linearis wet forest with Perrottetia, Antidesma, Broussaisia, Hedyotis terminalis, Myrsine linearifolia, Syzygium sandwicense, Cyanea fissa, Freycinetia, Melicope feddei, Scaevola, Psidium cattleianum. Preserved_Specimen Shrub 2 meters ht. with flowers, stem not very angled,, leaves chartaceous, broadly elliptic, pale green lower surface, flowers pale yellow, seems a little different from typical L. hirtella Perlman, S. 17920 Kauai BISH 2002-02-28
9 Geniostoma imadae Lihue District. Northeast of Kapalaoa peak. On east side of ridge, In gulch of hanging side valley. Along perennial stream at bottom of gulch. Rocky, muddy, unundated substrate. W/Broussaisia arguta, Cyrtandra longifolia, Psidium cattleianum, Bidens sp., Cheirodendron sp., Clidemia hirta, Dubautia sp., Metrosideros polymorpha, Psychotria marianiana, Perrottetia sandwicensis Preserved_Specimen About 1 meter tall. In fruit and flower. Persisitent calyx on fruit. Flowers yellow-orange. Walsh, S. 90 Kauai BISH 2015-08-27
10 Geniostoma imadae Lihue District: Iole headwaters. Metrosideros-Cheirodendron mixed wet forest with matting ferns of Diploterygium & Dicranopteris w/ Touchchardia latifolia, Psychotria mariniana, P. hexandra, Antidesma platyphylla, Kadua affinis, Bobea elatior, Syzygium sandwicense, Melicope wawraeana, Vaccinium calycinum, Myrsine kauaiensis, Hydr Preserved_Specimen Tree, 1.5 m tall, moderately branched, w/ mature fruit open, occasional in area, Wood, K.R. 19587 Kauai BISH 2024-08-07
11 Geniostoma imadae Lihue District, Iole headwaters. Metrosideros-Cheirodendron mixed wet forest with matting ferns of Diplopterygium & Dicranopteris w. Broussaisia arguta, Touchardia latifolia, Psychotria mariniana, P. hexandra, Antidesma platyphylla, Kadua affinis, Melicope wawraeana, Vaccinium calycinum, Coprosma kauaense, Sadleria spp, Cystopte Preserved_Specimen Tree, 2 m tall, w/ immature fruit, qualities of L. tinifolia & L. degeneri Wood, K.R. 18793 Kauai BISH 2021-07-29
12 Geniostoma imadae Waiahi, upper central headwaters Metrosideros-Cheirodendron mixed wet forest bordered by matting ferns of Diplopterygium & Dicranopteris w/ dissecting drainages and steep windswept shrubland slopes of Broussaisia arguta, Syzygium sandwicensis, Perrottetia sandwicensis, Touchardia latifolia, Embelia pacifica, Pipturus albidus, P. ruber Preserved_Specimen Tree 2.5 m tall, moderately branched, in flower and immature fruit Wood, K.R. 18141 Kauai BISH 2019-04-04
13 Geniostoma imadae Lihue District. Waiahi, upper central headwaters Metrosideros-Cheirodendron mixed wet forest with dissecting drainages and steep windswept shrubland slopes with matting ferns of Diplopterygium ; Dicranopteris w/ Broussaisia arguta, Syzygium sandwicensis, Perrottetia sandwicensis, Touchardia latifolia, Embelia pacifica, Pipturus albidus, P. ruber, Psychotria mariniana, P. hexandra, Antidesma platyphylla Preserved_Specimen tree, 2 m tall, with old fruit capsules, occasional with L. hirtella Wood, K.R. 15770 Kauai BISH 2013-12-30
14 Geniostoma imadae Hanalei District: Lumahai Valley, south facing side of ridge running below southern end of Namolokama. Metrosideros lowland wet forest bordered by steep slopes of Dicranopteris and Diplopterygium matting ferns, 90% closed canopy w/ Antidesma platyphyllum var. hillebrandii, Syzygium sandwicensis, Cheirodendron forbesii, Ilex anomala, Wikstroemia oahuensis, Polyscias oahuensis, Polyscias waialealae, Dubautia knudsenii, Psychotr Preserved_Specimen Tree 2.5 m tall, with immature fruit, single plant observed w/ Geniostoma waialealae in general area. Wood, K.R. 792 Kauai BISH 2024-07-23
15 Geniostoma imadae Koloa District; Lihue-Koloa Forest Reserve. Wahiawa Stream & mountains. Up unnamed tributary and ridge flank east towards ridge connecting Kahili & Kapalaoa Peaks Low, wet forest with Metrosideros polymorpha dominant, also Cheirodendron, Antidesma, Tetraplasandra, Melicope, Ilex, Syzygium. Small population of 4-5 plants, edge of forest, 770 m (also seen at 700 m along stream). Preserved_Specimen Shrubby treelet 2 m. Leaves flat, brittle, succulent, dark glossy green above, whitish beneath with veination immersed. Inflorescence nodding; corolla waxy orange yellow with faint sweet fermenting fruity odor (11 am), lobes 5-6, spreading, stigmas whitish-green, thick. Lorence, D.H. 6741 Kauai BISH 1991-03-28
16 Geniostoma imadae Wahiawa mts., SW of Kapalaoa, between Hulua and Kapalaoa, off ridge between Wahiawa and Hanapepe Metrosideros, Dicranopteris, Cheirodendron, Tetraplasandra, Psychotria, Dubautia imbricata, Hesperomannia, Hedyotis terminalis, Cyanea sylvestris, Scaevola, Bobea, Cyanea fissa, Labordia degeneri, Pritchardia, Psidium Preserved_Specimen 2-3 m shrub; leaves elliptic to oblanceolate, lower pale white, glabrous, apex acuminate; peduncles 4 cm; pedicels 5 mm; corolla yellow; fruit capsule 15x10 mm Perlman, S. 17891 Kauai BISH 2002-01-15
17 Geniostoma imadae Koloa district; Kapalaoa slopes, Wahiawa area above Kanaela bog. Metrosideros-Dicranopteris linearis wet forest. Antidesma platyphylla, Perrottetia sandwicensis, Kadua affinis, Scaevola gaudichaudiana, Cyanea kahiliensis, Polyscias oahuensis, Bobea brevipes, Psidium cattleianum, Clidemia hirta Preserved_Specimen shrub 3 m ht with flowers and fruit Perlman, S. 22954 Kauai BISH 2012-06-28
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