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Gentianaceae
Bartonia

Bartonia paniculata (Michaux) Muhlenberg ssp. paniculata. Common name: Screwstem Bartonia. Phenology: Aug-Oct; Sep-Oct. Habitat: Swamps, bog, pocosin, pocosin ecotone, sphagnous seepages, sinkhole pond. Distribution: Ssp. paniculata ranges from MA south to c. peninsular FL and west to e. TX, chiefly on the Coastal Plain, but with scattered occurrences inland, to c. VA, e. WV (Vanderhorst et al. 2013), w. NC, KY, and AR.

Glossary (beta!)

Origin/Endemic status: Native

Synonymy ⓘ: = Ar, FNA14, K4, Mo3, Va, Drake (2011), Gillett (1959), Mathews et al (2009); Centaurella paniculata Michx. = Bartonia paniculata (Michx.) Muhl. — G, NE, Correll (1966); = Bartonia paniculata (Michx.) Muhl. var. paniculata — C, F; >< Bartonia lanceolata Small — S; < Bartonia paniculata (Michx.) Muhl. — Fl5, GW2, Il, Mi, Pa, RAB, Tat, Tn, Tx, WH3; < Bartonia paniculata (Michx.) Muhl. ssp. paniculata — NY. Basionym: Centaurella paniculata Michx. 1803

Links to other floras: = Bartonia paniculata ssp. paniculata - FNA14

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: OBL (taxonomic split from wetland indicator species)
  • Eastern Mountains and Piedmont: OBL (name change)
  • Great Plains: OBL (taxonomic split from wetland indicator species)
  • Midwest: OBL (taxonomic split from wetland indicator species)
  • Northcentral & Northeast: OBL (taxonomic split from wetland indicator species)

Heliophily ⓘ: 5

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image of plant© Erik Danielson source | Original Image ⭷
image of plant© Alan Cressler: Bartonia paniculata subsp. paniculata, Taylor County, Georgia 1 by Alan Cressler source | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Floyd A. Griffith | Original Image ⭷

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Horticultural Information

NCBG trait

Intro: Erect or sprawling, slender annual of swamps, bogs, pocosins, pocosin ecotones, sphagnous seepages and sinkhole ponds.

Stems: Stems smooth, twisted, and tinted with purple; sometimes twining or sprawling on other plants.

Leaves: Leaves, mostly alternate, are scale-like and greenish-purple.

Inforescence: Inflorescence is a sparse, narrow panicle.

Flowers: Tiny 4-petalled, green to creamy white flowers (occasionally tinted pink) are borne individually on stalks of the panicle; petals are lanceolate and acute to long acuminate and often remain closed.

Fruits: Fruit a tiny, oval capsule.

Comments: Bartonia species are believed to be at least partly dependent on a fungal association (mycorrhizae) in the soil.

Height: 4-16 in.

plant sale text:

bloom table text:

description: Erect or sprawling, slender annual of swamps, bogs, pocosins, pocosin ecotones, sphagnous seepages and sinkhole ponds.

stems: Stems smooth, twisted, and tinted with purple; sometimes twining or sprawling on other plants.

leaves: Leaves, mostly alternate, are scale-like and greenish-purple.

inflorescence: Inflorescence is a sparse, narrow panicle.

flowers: Tiny 4-petalled, green to creamy white flowers (occasionally tinted pink) are borne individually on stalks of the panicle; petals are lanceolate and acute to long acuminate and often remain closed.

fruits: Fruit a tiny, oval capsule.

comments: Bartonia species are believed to be at least partly dependent on a fungal association (mycorrhizae) in the soil.

cultural notes:

germination code:

native range:



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