Pacific Island Ecosystems at Risk (PIER)

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Turnera subulata
Hitchc., Passifloraceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

English: white alder

Habit:  herb

Description:  "Perennial herb, often woody at the base, 30-80 cm high, with a frequently very strong taproot; stems terete, leafy over a considerable length, densely appressed pubescent.  Leaves not crowded, ovate-elliptic or ovate-oblong from a cuneate entire base, acute or rather obtuse, very distinctly dentate-serrate, rather densely gland-dotted beneath, on both surfaces, especially the lower, appressed white-pubescent (hairs on the nerves longer and more closely set), 1 3/4-9 cm by 3/4-4 cm; midrib and usually also the erecto-patent lateral nerves distinctly prominent beneath.  Petiole with 2 rather large apical lateral glands, appressed hairy, 1/2-1 1/4 cm long.  Stipules erect, very minute, long-hairy.  Flowers in the higher leaf-axils.  Pedicel 1/3-1/2 cm.  Bracteoles at the calyx-base, broadest at the base, very acute.  Calyx densely appressed pubescent and gland-dotted without, glabrous within except on the pilose base; tube rather abruptly widened in the upper half 1/2-3/4 cm long; segments narrow, very acute, 1-1 1/2 cm long.  Petals with a slightly hairy, 3-4 mm long claw, blade obovate, broadly rounded, entire, above the claw glabrous, finally above the base much spreading or subreflexed, 2-3 1/2 cm by 1 3/4-2 1/2 cm.  Filaments with broad membranous-margined bases; anthers inserted dorsally a little above their base.  Ovary ovoid, densely clothed with appressed white hairs, with 3 glabrous apical depressions (style-scars).  Capsule ovoid, obtuse, finely verruculose, hairy, rather thick-walled.  Seeds subprismatical, on one end crowned by a semiglobular boss, brownish yellow, 2 3/4-3 by ± 4/5-1 mm; aril white" (Van Steenis, 1948; pp. 236-237).

Habitat/ecology:  In Indonesia, "Inhabitant of sunny localities, fields, waste places, railway embankments, railway yards, old brick walls, 10-250 m, locally often copious" (Van Steenis, 1948; pp. 236-237).

Propagation:  Seed

Native range:  Brazil (GRIN).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Ecuador (Galápagos Islands)
San Cristóbal Group
San Cristóbal Island introduced
cultivated
Charles Darwin Foundation (2008)
Ecuador (Galápagos Islands)
Santa Cruz Group
Santa Cruz Island introduced
cultivated
Charles Darwin Foundation (2008)
Federated States of Micronesia
Kosrae Island
Kosrae Island introduced
cultivated
Lorence, David H./Flynn, Timothy (2010) (p. 25)
Marshall Islands
Ratak Chain
Wotje (Wõjjã) Atoll introduced
Vander Velde, Nancy/Vander Velde, Brian (2009) (p. 2)
Voucher cited: Vander Velde 0515200906
Palau
Kayangel Atoll
Kayangel Islet introduced
invasive
Miles, Joel (2015) (p. 2)
ref cites other taxa as "Cultivated," but not this one, so implication is that this taxon was found in a non-cultivated situation (PT@PhilipT.com/20170602)
Palau
Palau (Belau ) (main island group)
Babeldaob Island introduced
cultivated
Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (pp. 11, 87)
Palau
Palau (Belau ) (main island group)
Babeldaob Island introduced
cultivated
Space, James C./Lorence, David H./LaRosa, Anne Marie (2009) (p. 13)
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island introduced
cultivated
Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (pp. 11, 83)
Palau
Palau (Belau ) (main island group)
Koror (Oreor) Island introduced
cultivated
Space, James C./Lorence, David H./LaRosa, Anne Marie (2009) (p. 13)
Palau
Palau (Belau ) (main island group)
Malakal (Ngemelachel) Island introduced
cultivated
Space, James C./Lorence, David H./LaRosa, Anne Marie (2009) (p. 13)
Palau
Palau (Belau ) (main island group)
Ngerkebesang Island introduced
cultivated
Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (pp. 11, 83)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Indonesia
Indonesia
Indonesia (Republic of) introduced
invasive
van Steenis, C. G. G. J. et al (1948) (pp. 4:236-237)
Malaysia
Malaysia
Malaysia (country of) introduced
invasive
Waterhouse, Barbara (year unknown)
Singapore
Singapore
Singapore (Republic of) introduced
invasive
Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 88)
Naturalised

Comments:  Reported to be somewhat weedy in Malaysia (Barbara Waterhouse, pers. com.).  See also Turnera ulmifolia.


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This page was created on 1 JAN 1999 and was last updated on 27 OCT 2006.