Pacific Island Ecosystems at Risk (PIER)

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Begonia fusca
Liebm., Begoniaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Begonia maxima hort. ex A. DC.

Habit:  herb

Description:  "Herbaceous, to 15 dm. high; rhizome procumbent or oblique, 15-40 mm. thick, setose, with very short internodes or sometimes only about 5 mm. thick and with distinct internodes; stipules deciduous, broadly ovate, subacuminate, pilose at first, serrate-setose or entire; petioles erect, 2-4 dm. long, densely retrorse-pilosulous; blades oblique, very broadly ovate or suborbicular, abruptly acuminate, often with several superficial acuminate lobes beside the apex, cordate, up to 6 dm. long, palmately 7-9-nerved, angulate-dentate, ciliate-serrate, thin, finely pubescent on both sides; peduncle exceeding the leaves, to 6 dm. long, 5-10 mm. thick, pilosulous at first; cyme regular, much branched, 2-5 dm. long, pubescent; bracts deciduous, suborbicular, pubescent, the upper ones entire, thin, the lower ones over 4 cm. long, sometimes serrulate; pedicels slender, 1-4 cm. long, pubescent; staminate tepals 2, broadly ovate or suborbicular, subacute or obtuse, 6-11 mm. long, fleshy, sparsely pilose, pink or white; stamens numerous, filaments shorter than the oblong anthers, connective produced into a broad flat cap above the anther; pistillate tepals 2 or sometimes a third and much smaller one inside the others, like the staminate but much smaller; ovary 3-celled, placentae bifid, ovuliferous throughout, styles deciduous, slightly connate at base, bifid, the stigmatic surface linear, spiral, continuous; capsule more or less nutant, broadly ovoid, pubescent at first, 8-12 mm. long, wings very unequal, the largest dolabriform or subovate, 25-30 mm. broad"  (Standley & Williams, 1961; 7/1 pp. 1667-168).

"[A] robust species with flowering scapes that attain one meter in height, standing taller than the leaves.  Plants have a fleshy rhizome up to 20 cm tall and 3 cm thick that produces leaves with petioles 25-40 cm tall, obliquely cordate blades 15-30 cm long and 7.5-23 cm wide, deep dull green above, paler on the underside, the margins scalloped to shallowly lobed.  Inflorescences are leafless, taller than the foliage, and bear forked clusters of white to pale pinkish flowers about 1.3 cm in diameter, with 2 tepals that are hairy outside.  The male flowers have ± circular tepals and a mass of stamens in the center; female flowers have a hairy ovary with 3 unequal, ciliate wings" (Miller, 2003; p. 22).

Habitat/ecology:  In Guatemala (native), "epiphytic or terrestrial on shady slopes, 1,300-2,500 meters"  (Standley & Williams, 1961; 7/1 pp. 1667-168).

Propagation:  Seed, probably dispersed by wind (Miller, 2003; p. 22).

Native range:  Southern Mexico, Guatemala and Honduras (GRIN).

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
Kaua‘i Island introduced
invasive
cultivated
Miller, Scott E./Staples, George W. (2003) (pp. 22-23)
Vouchers cited: T. Flynn & M. Bergau 1558 (BISH, PTBG), L. Hume & T. Flynn 478 (BISH, PTBG)
State of Hawaii
Hawaiian Islands
O‘ahu Island introduced
invasive
cultivated
Miller, Scott E./Staples, George W. (2003) (pp. 22-23)
Vouchers cited: S. Miller 11 (BISH), A. F. Judd, E. H. Bryan Jr., & M. Neal s.n. (BISH 42874), D. Afualo s.n. (BISH 580134)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Guatemala
Guatemala
Guatemala (Republic of) native
Standley, Paul C./Williams, Louis Otho (1961)
Honduras
Honduras
Honduras (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Mexico
Mexico
Mexico (United Mexican States) native
Standley, Paul C./Williams, Louis Otho (1961)


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This page was created on 10 DEC 2006 and was last updated on 13 MAR 2012.