Sabdariffa brackenridgei subsp. mokuleiana

(M.J.Roe) M.M.Hanes & R.L.Barrett (2025)

This name is accepted

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

Description

Key Characters:

Growth Form: Trees to 10 m.

Stems: Young branches prickly with densely stellate pubescence, often with scattered, reddish to yellowish, spreading, simple, spinescent, pustular–based hairs.

Roots:

Leaves: Leaves simple. Alternate. Leaves heteroblastic. The leaves at midpoint ovate or 3-5-lobed, 5-14 cm long X 4.5-12 cm wide. The leaves at upper plant: leaves bract-like and oblanceolate, to 20 X 5 mm long or shallowly lanceolate to ovate to 3-5-lobed, 15-60 mm long X 8-80 mm wide. Leaves at mid-plant: apex acute to obtuse. Leaves at upper plant: bract-like and oblanceolate leaves with apex acute, lanceolate to ovate leaves with acute to obtuse apex. Base truncate to cordate (at mid-plant). Leaves at upper plant: bract-like and oblanceolate with a cuneate base. Nectary apparently absent on lower and upper leaves, present or absent on leaves at mid-plant. Margins serrate to dentate: leaves near base of the plant not seen. Leaves at upper plant: bract-like and oblanceolate leaves with serrate margin. Petiolate; leaves at mid-plant: petioles 3-8.5 cm long, sparsely to densely fine stellate-pubescent, or sometimes with a few coarse stellate hairs. Leaves at upper plant: petioles 0.8-9 cm long, pubescent like those at mid-plant. Stipules filiform, 3–15 mm long, sparsely to densely fine stellate-pubescent.

Flowers: Flowers solitary, axillary, or sometimes clustered near the apex; peduncles peduncles 2-5 mm in bud, elongating to 13-15 mm in fruit, articulating at the base, densely fine stellate-pubescent and with shiny, pustular-based hairs to 2 mm long; involucellar bracteoles 7-11 in number, linear to narrowly subulate, rounded or flattened, 9-25 mm long, pubescent like peduncles, the apex entire. Flowers bisexual (perfect). Calyx to 35 (40) mm long in fruit, the lobes long-acuminate at the apex, sparsely to densely fine stellate-pubescent, or sometimes with appressed or matted. shiny, simple (or sometimes 2-forked) pustuliferous hairs, the midrib and marginal ribs green-brown (or brown in mature fruits) or conspicuously red-purplethe nectary absent. Corolla yellow, each petal with a small to large red, brownish, or purple basal spot, the petals obovate. 3.5-4.5 cm long x 2-4 cm wide, ventrally glabrous, dorsally sparsely fine stellate-pUbescent, or sometimes with a few straight hairs. Stamens 5 to numerous, monadelphous, forming a staminal column; staminal column included or exerted, 20-40 mm long, red,-red-brown, or red-purple below, cream or tan-yellow above, the filaments 0.5-3 mm, the anthers monothecal, yellow-tan or red-purple. Pollen globose, echinate, cream, tan, brown, orange or red. Ovary superior, placentation axile; ovules 3 or more per cell; style branches exserted to 5 mm beyond the staminal column.

Fruit: Loculicidally dehiscent capsules 12-20 mm long X 12-17 mm in diam.; glabrous (?) or sparsely to densely appressed-pubescent; the beak 1-3 mm long; glabrous. Seeds 3-5 mm long X 2-3 mm wide; angular-reniform; light brown to brown with honeycombed markings and pectinate scales; the funiculus small; inconspicuous; light- to dark-brown; sometimes with a fringe of hairs.

Ploidy: 2n = 72*

Habitat: Rare in dry forest and shrubland.

Elevation Range: 0–370 m.

Historical Distribution

Uses and Culture

USES

Natural History

Statewide Status

Endemic

Island Status

Kaua'i Endemic
O'ahu Endemic

Dispersal Agents


Pollinators

Bibliography

Name Published In: Austral. Syst. Bot. 38-SB24013: 33 (2025)

Other References

Wagner et al. 1990:884 (K, O [as Hibiscus brackenridgei subsp. mokuleianus]); Wilson 1993:278/Staples & Herbst 2005:387 (KEY, DESCR); Barrett et al. 2025:33 (COMBNOV, Syn. H. b. subsp. mokuleianus = S. b. subsp. mokuleiana, KEY); Matt Keir pers. comm. 2025/Rock 38 BISH (K†, 1909)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Sabdariffa brackenridgei subsp. mokuleiana Cliffs overlooking Kawaihapai Spring-fed bare ledges in arid region. Preserved_Specimen Degener, O. 8961 Oahu BISH 1929-01-27
2 Sabdariffa brackenridgei subsp. mokuleiana Makaleha cliffs Preserved_Specimen Rock, J.F.C. 12986 Oahu BISH 1917-05-01
3 Sabdariffa brackenridgei subsp. mokuleiana Makaleha cliffs Preserved_Specimen Rock, J.F.C. 12986 Oahu BISH 1917-05-01
4 Sabdariffa brackenridgei subsp. mokuleiana Lihue Preserved_Specimen Rock, J.F.C. 2452 Kauai BISH 1909-03-18
5 Sabdariffa brackenridgei subsp. mokuleiana Waianae Range, Kaumokunui Gulch Off gully floor growing among Leucaena (Koa haole), Panicum maximum (Guinea grass), & Aleurites (Kukui). Preserved_Specimen Two 3 m trees, robust and in bloom. Obata, J.K. Oahu BISH 1994-03-03
6 Sabdariffa brackenridgei subsp. mokuleiana Waimea Arboretum Preserved_Specimen Bennett, T. 156 Oahu BISH
7 Sabdariffa brackenridgei subsp. mokuleiana Valley SE of Kawaihapai Arid ledges with Lantana, etc. Preserved_Specimen Degener, O. 8963 Oahu BISH 1932-12-11
8 Sabdariffa brackenridgei subsp. mokuleiana 2nd gulch E of Puu Kaupakuhale NE slope of Puu Kaala, Waianae Mts, Mokuleia Dry hillsides, lower woods. Preserved_Specimen Tree 18 ft x 6 in. St.John, H. 13184 Oahu BISH 1933-05-14
9 Sabdariffa brackenridgei subsp. mokuleiana Kealia Trail Valley east of trail, behind Dillingham Airfield, on side slopes of valley east of control tower In Erythrina forest with grasses, Canthium, Rauvolfia, Reynoldsia, Sida, Haole koa, Artemisia, Chenopodium, Schiedea Preserved_Specimen Ten plants 1-2 m in height, no flowers or fruit Perlman, S. 5220 Oahu BISH 1987-12-12
10 Sabdariffa brackenridgei subsp. mokuleiana Kaumuku gulch, Oahu, T.H. Grassy & shrubby ledge. Preserved_Specimen Degener, O. 11083 Oahu BISH 1937-03-17
11 Sabdariffa brackenridgei subsp. mokuleiana W sid of gulch to Mt Kaala On dry slope. Preserved_Specimen Furmidge, G. Oahu BISH 1933-05-14
12 Sabdariffa brackenridgei subsp. mokuleiana Waianae Mts., nr Mokuleia Forest Reserve, in valley on slope N of Puu Iki Among koa haole (Leucaena glauca), rather dry. Preserved_Specimen Korte, K.H. Oahu BISH 1941-05-13
13 Sabdariffa brackenridgei subsp. mokuleiana gulch N of middle ridge between Puu Kamaohanui and Puu Pane Arid ledges with Lantana, grass, trees etc. Preserved_Specimen Degener, O. 8962 Oahu BISH 1932-01-10
14 Sabdariffa brackenridgei subsp. mokuleiana First small gulch NW of Puu Pane Peak Sunny seasonally dry forest. Preserved_Specimen Small erect tree; fl. with faint brownish eye. Degener, O. 20943 Oahu BISH 1950-04-02
15 Sabdariffa brackenridgei subsp. mokuleiana Kealia Trail Near cliff top, opposite of west end of Dillingham Field, east of trail Growing along semi-rocky sloping terrain and among alien grasses andshrubery Preserved_Specimen Obata, J.K. 88687 Oahu BISH 1988-04-19
16 Sabdariffa brackenridgei subsp. mokuleiana Kaumuku gulch Grassy & shrubby ledge. Preserved_Specimen 15 ft tree; corolla sulphur yellow with obscure purple eye, almost rotate. Degener, O. 11083 Oahu BISH 1937-03-17
17 Sabdariffa brackenridgei subsp. mokuleiana Waianae Mts, nr. Mokuleia Forest Reserve in valley on slope N of Puu Iki Rather dry, among koa haole. Preserved_Specimen Korte, K.H. Oahu BISH 1941-05-13
18 Sabdariffa brackenridgei subsp. mokuleiana Lihue, Kauai Preserved_Specimen Rock, J.F.C. 382452 Kauai BISH 1909-03-18
19 Sabdariffa brackenridgei subsp. mokuleiana Waianae Mts, Mts behind Dillingham Airfield, E of Kealia trail W facing slope, in Sapindus lowland mesic forest with Aleurites, Syzygium, Canthium, Leucaena, Panicum, Schinus, Plumbago, Bidens, Lipochaeta, Schiedea. Preserved_Specimen Perlman, S. 5842 Oahu BISH 1987-05-14
20 Sabdariffa brackenridgei subsp. mokuleiana Lihue Preserved_Specimen Rock, J.F.C. 38 Kauai BISH 1909-03-18
21 Sabdariffa brackenridgei subsp. mokuleiana valley in mountains behind Waialua Mill Preserved_Specimen Tree 15 ft by 8 in.; fls unusually large, corolla yellow with maroon center, almost rotate. Degener, O. Oahu BISH 1937-03-17
22 Sabdariffa brackenridgei subsp. mokuleiana gulch N of middle ridge between Puu Kamaohanui and Puu Pane Arid ledges with Lantana, grass, trees etc. Preserved_Specimen Degener, O. 8962 Oahu BISH 1932-01-10
23 Sabdariffa brackenridgei subsp. mokuleiana Waianae Range, Mokuleia, NE slope of Mt. Kaala, second gulch east of Puu Kaupakuhale Preserved_Specimen Tree 30 ft. high, dbh 10 in., pithy. Flowers brilliant yellow with purple near base of staminal column. Roe, M.J. 210 Oahu BISH 1957-02-16
24 Sabdariffa brackenridgei subsp. mokuleiana Waianae Range, Mokuleia, NE slope of Mt. Kaala, second gulch east of Puu Kaupakuhale Preserved_Specimen Tree 30 ft. high, dbh 10 in., pithy. Flowers brilliant yellow with purple near base of staminal column. Roe, M.J. 210 Oahu BISH 1957-02-16
25 Sabdariffa brackenridgei subsp. mokuleiana valley in mountains behind Waialua Mill Preserved_Specimen Tree 15 ft by 8 in.; fls unusually large, corolla yellow with maroon center, almost rotate. Degener, O. Oahu BISH 1937-03-17