familyNyssaceae
genusNyssa

Nyssa biflora

Walter

Fl. Carol., 253. 1788.

Common names: Swamp black or sour gum
Endemic
Synonyms: Nyssa sylvatica subsp. biflora (Walter) A. E. Murray N. sylvatica var. biflora (Walter) Sargent
Treatment appears in FNA Volume 12. Treatment on page 461. Mentioned on page 459.

Trees, 10–30 m, base often buttressed in larger individuals, proximal limbs spreading to slightly drooping, crown irregular; bark irregularly fissured; twigs glabrous or puberulent. Leaves: petiole 7–10 mm; blade oblanceolate to narrowly elliptic, rarely ovate, 3.7–7.2 × 1.6–3.5 cm, subcoriaceous, base cuneate to rounded, margins usually entire, rarely coarsely dentate distally, apex obtuse to acute, abaxial surface glabrous or puberulent (primarily along veins), adaxial surface glabrous. Inflorescences: peduncle 3.2–5.5 cm, sparsely hairy; staminate (1–) 2–8-flowered, pistillate and bisexual 1–3-flowered. Staminate pedicels present. Flowers: ovary glabrous. Drupes usually black, sometimes to blue, glaucous, ovoid, 7–14 mm, smooth; stone 7–9 mm, with several low, rounded longitudinal ridges.


Phenology: Flowering spring.
Habitat: Swamps, flatwood depressions and ponds, bogs, wet streamheads, seepage slopes, often in sites with standing water during part of the year or with organic soils saturated year-round, less often in mesic forests.
Elevation: 0–100(–200) m.

Distribution

V12 169-distribution-map.jpg

Ala., Ark., Del., Fla., Ga., Ill., Ky., La., Md., Miss., Mo., N.J., N.C., S.C., Tenn., Tex., Va.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Nyssa biflora"
puberulent +  and glabrous +
obtuse;acute +
Gordon C. Tucker +  and Tracy J. Park +
Walter +
gray brown +
fissured +
cuneate;rounded +
3.7 cm37 mm <br />0.037 m <br /> (7.2 cm72 mm <br />0.072 m <br />) +
pinnate +, dentate +, sparsely +  and entire +
ovate;oblanceolate;narrowly elliptic +
subcoriaceous +
1.6 cm16 mm <br />0.016 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
Swamp black or sour gum +
Ala. +, Ark. +, Del. +, Fla. +, Ga. +, Ill. +, Ky. +, La. +, Md. +, Miss. +, Mo. +, N.J. +, N.C. +, S.C. +, Tenn. +, Tex. +  and Va. +
blue +  and black +
0.7 cm7 mm <br />0.007 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
0–100(–200) m. +
unisexual +  and bisexual +
Swamps, flatwood depressions and ponds, bogs, wet streamheads, seepage slopes, often in sites with standing water during part of the year or with organic soils saturated year-round, less often in mesic forests. +
1-3-flowered +, pistillate +, (1-)2-8-flowered +  and staminate +
dentate +  and entire +
intrastaminal +
3.2 cm32 mm <br />0.032 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
greenish;greenish white +
distinct +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering spring. +
1(-2)[-3]-carpellate +
Fl. Carol., +
rounded +
free +  and distinct +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
conic +  and subulate +
Nyssa sylvatica subsp. biflora +  and N. sylvatica var. biflora +
Nyssa biflora +
species +
puberulent +  and glabrous +
dioecious +, polygamous +  and monoecious +