Buchnera floridana

Gandoger

Bull. Soc. Bot. France 66: 217. 1919.

Common names: Florida bluehearts
Illustrated
Synonyms: Buchnera breviflora Pennell
Treatment appears in FNA Volume 17. Treatment on page 507. Mentioned on page 504, 506, 508.

Biennials; blackening upon drying. Stems simple or branched distally, 2–8 dm, appressed-hirsute or spreading-hirsute proximally, appressed-hirsute or glabrous distally. Leaves much smaller distally; larger blade: major vein 1, minor veins (0–) 2, narrowly oblanceolate, lanceolate, or broadly linear, 25–60 x 3–12 mm, margins entire or crenate, teeth 0.5–1.5 mm, apex obtuse or rounded, sometimes acute, surfaces glabrate or appressed-pilose. Spikes: bracts ovatelanceolate, 1.5–4 mm. Pedicels 0.5–1 mm; bracteoles 1–2 mm. Flowers: calyx 4.5–5.5 mm, tube obscurely 10-nerved, ascending to appressed-hispid, hairs often pustular-based; corolla 10–16 mm, glabrate externally, lobes 2–5 mm; style included, 1–2 mm. Capsules blackish, ovoid, 4.5–6.5 mm, glabrate. Seeds 0.5–0.7 mm.


Phenology: Flowering May–Oct.
Habitat: Moist pine savannas, flatwoods, streamhead ecotones, seepage slopes, pitcher-plant bogs.
Elevation: 0–150 m.

Distribution

Ala., Ark., Fla., Ga., La., Miss., N.C., S.C., Tex., Mexico (Yucatán), West Indies (Bahamas), West Indies (Cuba), West Indies (Dominican Republic), West Indies (Jamaica), Central America (Belize)

Discussion

Buchnera floridana is mostly restricted to the Coastal Plain, occurring primarily in fire-maintained, pine-graminoid ecosystems in strongly acidic soils. Collections also have been made from higher pH soils of chalk prairies in Alabama and Mississippi and from limestone substrates in Florida and Texas; in the Caribbean, it regularly occurs in limestone soils. The situation in Texas is unusual in that B. floridana occurs far inland as well as on the Coastal Plain; most Texas specimens of Buchnera belong to B. floridana; B. americana is known from counties along the Red River and in the pinelands of eastern Texas.

Some specimens of Buchnera floridana from southern Florida and the Keys have slender leaves and reduced indument on the calyx, which are typical of B. longifolia Kunth (= B. elongata Swartz; both names have been applied to Florida plants) of the Caribbean, Central America, and South America; they lack the glabrous corollas, long calyces, and large inflorescence bracts of B. longifolia. The presence of one or more B. longifolia characteristics in southern Florida plants may be the result of past contact between the two species; there is no evidence that the two come into contact in Florida at present.

Selected References

None.

Lower Taxa

None.

"broader" is not a number."dm" is not declared as a valid unit of measurement for this property.

... more about "Buchnera floridana"
acute +, rounded +  and obtuse +
Bruce A. Sorrie +
Gandoger +
not leathery +  and not fleshy +
ovatelanceolate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
tubular +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
semiwoody +
Florida bluehearts +
white +, rosy +, violet +, blue +, blue-purple +  and purple +
salverform +
1 cm10 mm <br />0.01 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
Ala. +, Ark. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +, S.C. +, Tex. +, Mexico (Yucatán) +, West Indies (Bahamas) +, West Indies (Cuba) +, West Indies (Dominican Republic) +, West Indies (Jamaica) +  and Central America (Belize) +
0–150 m. +
2 +  and 1 +
indehiscent +, septicidal +, loculicidal +  and dehiscence +
Moist pine savannas, flatwoods, streamhead ecotones, seepage slopes, pitcher-plant bogs. +
pustular-based +
axillary +  and terminal +
subopposite +  and opposite +
deciduous +
cauline +  and basal +
smaller +
triangular +
crenate +  and entire +
2.5 cm25 mm <br />0.025 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
tenuinucellate +  and unitegmic +
campylotropous-like +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Flowering May–Oct. +
Bull. Soc. Bot. France +
spikelike +
dark-brown;blackish +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
Illustrated +
subequal +
branched +  and simple +
aerial +  and subterranean +
glabrous +, appressed-hirsute +, , +  and spreading-hirsute +
not fleshy +
short-cylindric +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
appressed-pilose;glabrate +
Buchnera breviflora +
Buchnera floridana +
Buchnera +
species +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
appressed-hispid +
perennial +  and biennial +