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Oxyspora paniculata

(D.Don) DC. (1828)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Eudicot-Rosids Order: Myrtales Family: Melastomataceae Genus: Oxyspora

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Description

Key Characters:

Growth Form: Shrubs 2–4 m tall.

Stems: Young branches sparsely to densely covered with stellate and spreading, plumose hairs.

Roots:

Leaves: Leaves simple. Opposite, decussate. Blades ovate, elliptic, or ovate–lanceolate, 8–16 cm long, 5–10 cm wide. Apex acuminate. Base rounded to subcordate. Upper surfaces glabrous at maturity; lower surfaces stellate pubescent on the nerves but otherwise glabrous. Margins entire to remotely serrulate. 5–7-veined. Petioles 9–32 mm long. Stipules absent.

Flowers: Flowers in inflorescences terminal panicles, 8–20(–30) cm long (incl. peduncle), bracts and bracteoles subulate to lanceolate, 1–4(–6) mm long, 0.5–2 mm wide at the base, deciduous. Flowers bisexual (perfect). Hypanthium quadrate in flower, 6–8 mm long, sparsely stellate pubescent, fruiting hypanthium 7–8(–10) mm long, 4.5–5 mm wide. Calyx lobes triangular, prominently keeled externally, persistent, 1–1.5 mm long, 1.5–2 mm wide at base. Corolla of 4 petals, pink to magenta, 6–9 mm long, 4–7 mm wide. Stamens 8, dimorphic, with larger ones inserted on receptacle opposite the calyx lobes and smaller ones inserted opposite the petals; anthers with a ventral, circular, subterminal pore; anther sacs prolonged at base into oblong lobes; anthers of larger Stamens 7–12 mm long, with anther sacs prolonged basally (to 1.5–2 mm), connective not prolonged; anthers of smaller Stamens 34.5 mm long, with anther sacs 2-lobed at base, connective prolonged dorsally into a deflexed spur 1–1.5 mm long. Ovary inferior, 4-celled, placentation axile; ovules numerous; style simple; stigma terminal, punctiform to capitate.

Fruit: Capsules essentially distinct but enclosed by hypanthium at maturity. Seeds 0.5–1 mm long; endosperm absent.

Ploidy: 2n = 40

Habitat:

Elevation Range:

Historical Distribution

Images

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Uses and Culture

USES

  • Yes

Natural History

Statewide Status

Naturalized

Island Status

O'ahu Naturalized

Dispersal Agents


Pollinators

Bibliography

Name Published In: Prodr. 3: 123 (1828)

Other References

Wagner et al. 1990:912 (O); Nagata 1995:12 (O); Staples & Herbst 2005:394 (KEY), 397 (DESCR)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Oxyspora paniculata Maunawili contour trail, gulch directly South of Maunawili stream. Wet, invasive dominated forest. Between 50-100 plants seen in gulch bottom and fromsides of steep gulch. Many plants inaccesible without ropes. Seedlings and root suckers seen, from rather deeply shaded areas, and also seen in a landslide scar. Preserved_Specimen k. Faccenda 3747 Oahu BISH 2024-11-29
2 Oxyspora paniculata Koloa Gulch, along Koloa fenceline, about 7ft off fence. In area dominated by native forest. Associated vegetation: Syzygium sandwicensis, Psidium cattleianum, Metrosideros polymorpha, Clidemia hirta, Paspalum conjugatum. Preserved_Specimen Woody shrub, 5ft ht; Leaves glabrous, reticulated, 5 main nerves/veins. No fruit or flower. Tamayo, C. 502 Oahu BISH 2018-11-07
3 Oxyspora paniculata Manoa Cliff Trail Rare; in degraded koa forest. Preserved_Specimen Sterile shrub. Fosberg, F.R. 41460 Oahu BISH 1961-03-10
4 Oxyspora paniculata Kupaua gulch. Ahupuaa of Waikiki in the ili of Niu. Southeastern Koolau mountains. Ridgeline bordering Kuliouou. Growing in gulch with Melinis repens, Touchardia latifolia, Metrosideros polymorpha, Macherina angustifolia, Labordia tinifolia, Nephrolepis brownii, Hoiokula sandwicensis, and others. Preserved_Specimen Large plant over 2 m. Severl plants invading gulch. Thomas, M.K. 747 Oahu BISH 2024-09-19
5 Oxyspora paniculata Lulumahu Gulch, ca. 1 mile form Konahuanui summit Along stream bed. Preserved_Specimen Obata, J.K. Oahu BISH 1984-11-11
6 Oxyspora paniculata Koolau Mts Rainforest Preserved_Specimen 2 m shrub, pinkish flower Gagné, W.C. 699 Oahu BISH 1974-10-13
7 Oxyspora paniculata Honolulu, Tantalus, Manoa Ridge trail guava, ieie, ti, Straussia, Labordia Preserved_Specimen Pearsall, G.A. 241 Oahu BISH 1958-10-10
8 Oxyspora paniculata Lulumahu Gulch, ca. 1 mile form Konahuanui summit Along stream bed. Preserved_Specimen Obata, J.K. Oahu BISH 1984-11-11
9 Oxyspora paniculata Honolulu, Waahila Ridge, summit trail S of Mt. Olympus On leeward side of trail on open, uluhe-covered slope, Metrosideros wet forest with Syzygium sandwicensis, Melicope, Freycinetia, infestation of Angiopteris in gulch below. Preserved_Specimen Several plants a few feet tall, flowering at this time, buds magenta. Several other plants seen along this stretch of trail, including one 8 ft. tall. Imada, C. 20053 Oahu BISH 2005-10-09
10 Oxyspora paniculata Koolau Mts Rainforest Preserved_Specimen 2 m shrub, pinkish flower Gagné, W.C. 699 Oahu BISH 1974-10-13
11 Oxyspora paniculata Tantalus, Manoa Cliff Trail In shade. Preserved_Specimen Plant 10-12 ft. high; leaves ca. 16 x 10 cm.; flowers in terminal panicle, 4-parted, petals rose-pink; 8 stamens, filaments pink, 4 anthers long, violet, 4 anthers short, yellowish; 4-celled, many-seeded. Landgraf, M.F. Oahu BISH 1954-10-26
12 Oxyspora paniculata Manoa sode of Mount Olympus Preserved_Specimen Trunk size about 1 1/2 in diameter by about 6-8' tall, forming a thicket. Gill, L. Oahu BISH 1978-01-22
13 Oxyspora paniculata Manoa Cliff Trail Preserved_Specimen Bushy shrub with many stems from base, 12 ft. high; flowers magenta-rose, 4 petals, tubular corolla. Pearsall, G.A. 461 Oahu BISH 1959-08-20
14 Oxyspora paniculata Waahila Ridge; summit of Mt. Olympus Preserved_Specimen 1 of 4 sterile plants seen. Range extension for this weed. Conant, P. Oahu BISH 1995-04-30
15 Oxyspora paniculata Tantalus Preserved_Specimen Pearsall, G.A. Oahu BISH 1959-10-08
16 Oxyspora paniculata Manoa sode of Mount Olympus Preserved_Specimen Trunk size about 1 1/2 in diameter by about 6-8' tall, forming a thicket. Gill, L. Oahu BISH 1978-01-22
17 Oxyspora paniculata Manoa sode of Mount Olympus Preserved_Specimen Trunk size about 1 1/2 in diameter by about 6-8' tall, forming a thicket. Gill, L. Oahu BISH 1978-01-22
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