Pacific Island Ecosystems at Risk (PIER)

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Buchnera floridana
Gand., Orobanchaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Common name(s): [more details]

English: Florida bluehearts, savanna bluehearts

Habit:  herb

Description:  "Annual or biennial herb, 20-60 cm. tall. Stem slender, simple, erect, slightly adpressed pilose-scabrid to subglabrous. Leaves remote, opposite, 3-6 cm. long, 3-13 mm. wide, the lower elliptic-lanceolate obtuse and obscurely trinerved, the upper linear-lanceolate, sub-acute, entire to subentire, hispid- verrucose above, shortly hispid beneath. Inflorescence 3-7 (-15) cm. long, lax; bracts ovate, subacuminate, about 3.0 mm. long; bracteoles narrow, shorter than bracts. Calyx erect, about 4.0-5.0 mm. long, with no nervations between the nerves; tube pubescent (except sometimes on the nerves) with short cripsed minutely callus-based hairs when young, becoming subglabrous to sub-verrucose in fruit. Corolla violet, blue or white; tube slender, externally softly and shortly pilose, little to twice as long as calyx; lobes triangular-obovate, variable in six, 2-5 mm. long, entire to subemarginate. Capsule subcompressed, spherical or ovoid, about 6.0 mm. long, longer than calyx when ripe; base of style not persistent"  (Philcox, 1965; p. 305).

Key to differentiate Buchnera floridana from Buchnera americana:

B. americana: "Calyx 6 0-7.0 mm. long, totally pubescent with short or long ascending adpressed simple to slightly callus-based hairs; capsule oblong to oblong-ellipsoid, 6.5-8.0 mm. long, equal to or very slightly longer than calyx.
B. floridana
: Calyx 4.0-5.0 mm. long, totally pubescent to pubescent in upper 1/3 only with short white crisped callus-based hairs; capsule ovoid to spherical, 5.0-6.0 mm. long, longer than calyx"  (Philcox, 1965; p. 279).

Habitat/ecology:  In its native range, "occasionally in low-lying swamps, but usually in sandy acidic pine and palm barrens to an altitude of about 1000 m"  (Philcox, 1965; p. 305).

Propagation:  Seed

Native range:  "In the United States from the coastal plan of North Carolina and Florida, to Texas and occasionally into Georgia, Missouri, Alabama and Louisiana; the Bahamas, Greater Antilles and westward to British Honduras"  (Philcox, 1965; p. 305).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Commonwealth of the Northern Mariana Islands (US)
Northern Mariana Islands
Rota Island introduced
Raulerson, L. (2006) (p. 61)
As Buchnera floridana Small[?]
Guam
Guam Island
Guam Island introduced
Raulerson, L. (2006) (p. 61)
As Buchnera floridana Small[?]
Guam
Guam Island
Guam Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1980) (voucher ID: PTBG 22750)
Taxon name on voucher: Buchnera floridana
Guam
Guam Island
Guam Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1978) (voucher ID: PTBG 22751)
Taxon name on voucher: Buchnera floridana
Marshall Islands
Ralik Chain
Bikini (Pikinni) Atoll   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2003) (voucher ID: PTBG 39899)
Taxon name on voucher: Buchnera floridana Gand.
Marshall Islands
Ralik Chain
Kili (Kõle) Atoll introduced
invasive
Vander Velde, Nancy/Vander Velde, Brian (2006) (p. 11)
As Buchnera americana L. "Common to locally abundant; air strip and other grassy fields, in yards and ruderal areas".
Marshall Islands
Ratak Chain
Arno Atoll introduced
invasive
Vander Velde, Nancy/Vander Velde, Brian (2007) (p. 12)
As Buchnera americana. "Common to locally abundant; primarily in grassy and ruderal areas, but some invading native vegetation; informant working at Reimers' farm said it was very problematic as it conquers an area which is then taken over by Cassytha".
Marshall Islands
Ratak Chain
Majuro (Mãjro) Atoll introduced
invasive
Vander Velde, Nancy (2003) (p. 134)
As Buchnera americana L. "Several small patches found and it may be showing invasive qualities".
Marshall Islands
Ratak Chain
Maloelap Atoll   Imada, Clyde (2006)
Marshall Islands
Ratak Chain
Mili (Mile) Atoll introduced
invasive
Vander Velde, Nancy/Vander Velde, Brian (2010) (p. A21)
As Buchnera americana L. Locally common; on runway and spreading out some to fields from there; single patch of white flowered plants on runway, Mili. Voucher 0725201007 (BISH, GUAM, PTBG)
Palau
Palau (Belau ) (main island group)
Babeldaob Island introduced
invasive
Raulerson, L./Rinehart, A. F./Falanruw, M. C. (1996) (p. 35)
Palau
Palau (Belau ) (main island group)
Babeldaob Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2008) (voucher ID: PTBG 125)
Taxon name on voucher: Buchnera floridana
Palau
Palau (Belau ) (main island group)
Babeldaob Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1998) (voucher ID: PTBG 27668)
Taxon name on voucher: Buchnera floridana Gand.
Palau
Palau (Belau ) (main island group)
Babeldaob Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (2007) (voucher ID: PTBG 47513)
Taxon name on voucher: Buchnera floridana
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
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Honduras
Honduras
Honduras (Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Mexico
Mexico
Mexico (United Mexican States) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Campeche, Tabasco, Veracruz
Indian Ocean
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
British Indian Ocean Territory
Chagos Archipelago
Diego Garcia Island   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1995) (voucher ID: PTBG 23868)
Taxon name on voucher: Buchnera floridana
Also reported from
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
United States (continental except west coast)
United States (other states)
United States (other states) native
Philcox, D. (1965) (p. 305)
United States (continental except west coast)
United States (other states)
USA (Florida) native
Philcox, D. (1965) (p. 305)


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This page was created on 21 JAN 2010 and was last updated on 21 JAN 2010.