Pacific Island Ecosystems at Risk (PIER)

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Solanum robustum
Wendl., Solanaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

English: shrubby nightshade, silverleaf nightshade

Habit:  shrub

Description:  "Shrubs up to 2 m tall, armed with strong, straight or slightly recurved, flattened prickles up to 12 mm long, base up to 6 mm wide, densely pubescent with stellate hairs on stems and upper and lower leaf surface along veins, ferruginous on younger shoots; stems strongly winged from the decurrent bases of the leaves, wings leafy, 2-15 mm wide.  Leaves with lower surface paler than upper surface, simple, alternate, ovate in outline but with 2-4 triangular lobes on each margin, sinuses cut 1/3 to midvein, juvenile leaves up to 30 cm long and 28 cm wide, later leaves ovate in outline, ca. 15 cm long and 10 cm wide, lobes 2-4 cm long, sinuses rounded, apex acute, base truncate to subcordate, oblique and continued down the petiole as a leafy wing, petioles 2-8 cm long.  Flowers perfect, actinomorphic, in unarmed, racemose cymes up to 10 cm long, extra-axillary, peduncle to first flower 1.5-2.5 cm long, pedicels ca. 1 cm long; calyx tube 2-3 mm long, the lobes ovate-lanceolate, 7-10 mm long; corolla stellate, deeply divided, the lobes lanceolate, 10-15 mm long, 5-8 mm wide, densely pubescent externally; stamens equal, inserted near base of corolla tube; filaments 1-3 mm long; anthers lanceolate, 5-7 mm long, opening by apical pores; ovary globose, densely pubescent; style 1, erect, 9-11 mm long, exceeding anthers, pubescent in lower part; stigma terminal.  Berries yellowish, globose, 1.2-2 cm in diameter, persistently pubescent, pedicels 1-2 cm long, calyx not much enlarged, reflexed.  Seeds numerous, brown, compressed, subreniform, ca. 1.4 mm long, foveolate"  (Wagner et al., 1999; pp. 1274-1275).

Habitat/ecology:  In Hawai‘i, "naturalized in guava-infested cattle pastures, ca. 230 m" (Wagner et al., 1999; pp. 1274-1275).

Propagation:  Seed

Native range:  South America (Wagner et al., 1999; pp. 1274-1275).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
State of Hawaii
Hawaiian Islands
Maui Island introduced
invasive
cultivated
Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (pp. 1274-1275)
Voucher cited: Hobdy 288 (BISH)
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
La Réunion (France)
La Réunion Island
La Réunion Island introduced
invasive
Lavergne, Christophe (2006)
"Naturalisé"


Need more info? Have questions? Comments? Information to contribute? Contact PIER! (pier@hear.org)

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This page was created on 28 FEB 2006 and was last updated on 25 OCT 2006.