Geniostoma hosakanum

(Sherff) Byng & Christenh. (2018)

This name is accepted

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

kāmakahala [kamakahala]

Description

Key Characters:

Growth Form: Low–growing shrubs up to ca. 0.5 m tall.

Stems: Stems angled, many-branched, moderately to densely short–hispid or short–hirsute.

Roots:

Leaves: Leaves simple. Opposite. Blades elliptic, oblong–elliptic, elliptic–obovate, or elliptic–ovate, 1.5–5(–7) cm long, 1–2(–3.5) cm wide. Apex acuminate to abruptly short-acuminate. Base cuneate to rounded. Upper surfaces short–hispid along lower part of midrib or near margins at base, sometimes glabrous; lower surfaces short–hispid along veins; pale green on lower surface, coriaceous and rugose. Margins revolute and usually ciliate toward base. Upper surface with veins strongly impressed. Petioles 0.2–0.6 cm long, short–hispid. Stipules interpetiolar, may also be intrapetiolar, membranous, connate into a cup 5–6.5 mm long, distinct from petioles, short–hispid at base, caducous.

Flowers: Flowers in inflorescences terminal, flowers 7–20 in sessile cymes, pedicels 2.5–6 mm long, hispidulous, bracts linear–spatulate, 8–13 mm long, ± ciliate, bracteoles linear–filiform to filiform, 7–10 mm long, ± ciliate. Flowers bisexual (perfect) or functionally unisexual, actinomorphic. Calyx 5-merous, sepals united at base, lobes slightly unequal, oblong–lanceolate to linear–lanceolate, 10–14 mm long, 1.1–2.5 mm wide, imbricate, conspicuously 3–7–nerved, margins conspicuously ciliate, sometimes hispidulous throughout, inner surface of Calyx often with colleters at the base, margin mostly fimbriate. Corolla 5-merous, campanulate to rotate, yellowish orange, glabrous or sparsely hirsute, 15–20 mm long, the tube slightly flaring, 9–12 mm long; lobes the lobes narrowly deltate, 5–7 mm long, apex acute, imbricate or contorted in bud. Stamens 5, alternipetalous, attached to mouth of corolla, exserted, usually recurved after anthesis, glabrous or hairy; filaments mostly short; anthers 2-celled, introrse, connective often extended to form an apical appendage, opening by longitudinal slits. Ovary superior or partly inferior, carpels hairy or glabrous, glabrous or sparsely hirsute in the upper part, 2– or 3-locular, sometimes partitions imperfect in upper part of ovary; ovules numerous, amphitropous, placentation axile; style terminal, mostly short; stigma clavate, ellipsoid, to globular, sometimes ± oblong, about as large as ovary.

Fruit: Capsules broadly ovoid–trigonous; 10–13 mm long; 6–8 mm in diameter; 3–valved; valves conspicuously keeled in upper part; keel 1–1.2 mm wide; apex with a beak 2–3 mm long; septicidal to sub–septifragal; maturing to green; with or without a black–purple tinge; usually becoming brown–black when over–mature. Seeds brown; 0.8–1 mm long; ± winged at both ends or all around; embedded in juicy orange to red pulp; numerous; ellipsoid to subglobular; intruded on the hilar side; surface mostly minutely papillose to areolate; brown to black; endosperm thick; fleshy; oily; proteinaceous; with saccharose or hemicellulose; embryo small; straight.

Ploidy:

Habitat: Occurring on cloud swept summits in wet forest.

Elevation Range: 790–860 m.

Historical Distribution

Uses and Culture

USES

Natural History

Statewide Status

Endemic

Island Status

O'ahu Endemic

Dispersal Agents


Pollinators

Bibliography

Name Published In: Global Fl. 4: 145 (2018)

Other References

Wagner et al. 1990:859 (O)

Occurrences

SNo. Scientific Name Scientific Name Authorship Locality Habitat Basis of Record Recorded By Record Number Island Source Date
1 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Windswept summit shrubland and cloud covered wet forest. PRESERVED_SPECIMEN K. R. Wood 4183 Oahu PTBG 4/5/1995
2 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN E. Y. Hosaka 679 F 7/4/1932
3 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN Wood, K. R.; Lau, J.; Gon, S. 5874 Oahu US 12/11/1996
4 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN Anderson, D. s.n. Oahu US 2/5/1939
5 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN Oahu US 8/11/1977
6 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Rain forest PRESERVED_SPECIMEN Morley, H. 71 Oahu BISH 12/10/1933
7 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information In windblasted habitat PRESERVED_SPECIMEN takeuchi, w.n. collector number: 1749 Oahu BISH 12/1/1985
8 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN Degener, O. 10152a Oahu BISH 6/2/1935
9 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Metrosideros-Cheirodendron forest. PRESERVED_SPECIMEN grant, m.l. collector number: 7236 Oahu BISH 8/7/1934
10 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Denuded ridge PRESERVED_SPECIMEN Hosaka, E.Y. 679 Oahu BISH 7/4/1932
11 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Rain forest PRESERVED_SPECIMEN morley, h. collector number: 71 Oahu BISH 12/10/1933
12 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information In moist rain forest PRESERVED_SPECIMEN Bryan Jr., E.H. 837 Oahu BISH 10/14/1934
13 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Wind-swept summit. PRESERVED_SPECIMEN degener, o. takamoto; martinez, m. collector number: 10542 Oahu BISH 3/15/1936
14 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information *Metrosideros - Dicranopteris - Ciboteium lowland wet forest with Hedyotis terminalis, Cheirodendron, Cyrtandra platyphylla, C. paludosa, Frecinetia, Broussaisia PRESERVED_SPECIMEN d. anderson s.n. Hawaii And Oahu BISH 2/5/1939
15 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN degener, o. park, k.k.; potter; bush collector number: 10152a Oahu BISH 6/2/1935
16 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN Anderson, D. s.n. Oahu BISH 2/5/1939
17 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information With Camphusia, Trematolobelia, Scaevola gaudichaudiana, et. al. PRESERVED_SPECIMEN gillett, g.w. collector number: 1585 Oahu BISH 5/29/1964
18 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN Wood, K. R. 4183 Oahu US 4/5/1995
19 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN e. y. hosaka 679 Oahu US 7/4/1932
20 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN k. r. wood 4183 Oahu US 4/5/1995
21 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Lawn. PRESERVED_SPECIMEN k. r. wood, j. lau & s. gon 5874 Oahu US 12/11/1996
22 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information In moist rain forest PRESERVED_SPECIMEN bryan jr., e.h. collector number: 837 Oahu BISH 10/14/1934
23 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Windblown slopes of the low statured summit zone vegetation. PRESERVED_SPECIMEN Takeuchi, W.N. s.n. Oahu BISH 8/1/1985
24 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information With Camphusia, Trematolobelia, Scaevola gaudichaudiana, et. al. PRESERVED_SPECIMEN Gillett, G.W. 1585 Oahu BISH 5/29/1964
25 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Exposed ridge. PRESERVED_SPECIMEN fosberg, f.r. collector number: 9729 Oahu BISH 8/6/1933
26 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Wind-swept summit. PRESERVED_SPECIMEN Degener, O. 10542 Oahu BISH 3/15/1936
27 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Denuded ridge PRESERVED_SPECIMEN hosaka, e.y. collector number: 679 Oahu BISH 7/4/1932
28 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information stream bed rock PRESERVED_SPECIMEN takeuchi, w.n. tate, b. collector number: s.n. Oahu BISH 4/1/1985
29 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Wet stunted forest. PRESERVED_SPECIMEN Takeuchi, W.N. s.n. Oahu BISH 4/1/1985
30 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Metrosideros-Cheirodendron forest. PRESERVED_SPECIMEN Grant, M.L. 7236 Oahu BISH 8/7/1934
31 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Wind- and rain-swept summit. PRESERVED_SPECIMEN degener, o. salucop, f.; arlantico collector number: 11553 Oahu BISH 12/6/1937
32 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN anderson, d. collector number: s.n. Oahu BISH 2/5/1939
33 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information In windblasted habitat PRESERVED_SPECIMEN Takeuchi, W.N. 1749 Oahu BISH 12/1/1985
34 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Wind- and rain-swept summit. PRESERVED_SPECIMEN Degener, O. 11553 Oahu BISH 12/6/1937
35 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Exposed ridge. PRESERVED_SPECIMEN Fosberg, F.R. 9729 Oahu BISH 8/6/1933
36 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Windblown slopes of the low statured summit zone vegetation. PRESERVED_SPECIMEN takeuchi, w.n. tate, w. collector number: s.n. Oahu BISH 8/8/1985
37 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Metrosideros- Dicranopteris linearis lowland wet forest. PRESERVED_SPECIMEN Steve Perlman 23733 Oahu PTBG 11/13/2013
38 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN K. R. Wood 5874 Oahu PTBG 12/11/1996
39 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information PRESERVED_SPECIMEN K. R. Wood 4183 Oahu PTBG 4/5/1995
40 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information Bog located within Metrosideros Lowland Wet Forest. PRESERVED_SPECIMEN K. R. Wood 2429 Oahu PTBG 2/27/1993
41 Geniostoma hosakanum (Sherff) Byng & Christenh. Contact Bishop Museum Botany department for locality information On windwept ridge crest. PRESERVED_SPECIMEN Steve Perlman 20443 Oahu PTBG 6/19/2007