Hypericum myrtifolium

Lamarck in J. Lamarck et al.
in J. Lamarck et al., Encycl. 4: 180. 1797.
Endemic
Synonyms: Brathydium myrtifolium (Lamarck) K. Koch Hypericum glaucum Michaux H. sessiliflorum Willdenow ex Sprengel Myriandra glauca (Michaux) Spach
Treatment appears in FNA Volume 6. Treatment on page 84. Mentioned on page 74, 85.

Shrubs, erect, with woody caudex, unbranched or branched distally, 3–10 dm, bark on older stems corky. Stems: internodes 4-lined. Leaf blades oblong-ovate to triangular-lanceolate, 8–40 × (5–)7–20 mm, base articulated, subcordate-amplexicaul, margins recurved, apex rounded, midrib with 3 or 4 pairs of branches. Inflorescences hemispheric to ± flat-topped, 7–30-flowered, widely branched, with flowers or flowering branches from to 3 proximal nodes. Flowers 15–25 mm diam.; sepals persistent, not enclosing capsule, 5, ovate to lanceolate, unequal to subequal, 5–8 × 2–4.5 mm; petals 5, bright yellow, obovate to oblong-lanceolate, 8–15 mm; stamens deciduous, 200; ovary 3(–4)-merous. Capsules pyramidal-ovoid, 5–6 × 3–4 mm. Seeds narrowly carinate, 1 mm; testa shallowly linear-reticulate. 2n = 18.


Phenology: Flowering late spring–summer (May–Jul), sometimes fall.
Habitat: Moist pinewoods, grassy bogs, pond margins, ditches
Elevation: 0–200 m

Distribution

V6 138-distribution-map.jpg

Ala., Fla., Ga., Miss., S.C.

Discussion

Hypericum myrtifolium is related to H. frondosum; it differs in its shorter, usually amplexicaul leaves, the widely dichasially branched inflorescences, and persistent sepals.

Selected References

None.

Lower Taxa

None.

... more about "Hypericum myrtifolium"
Norman K. B. Robson +
Lamarck in J. Lamarck et al. +
Undefined sect. Myriandra +
Ala. +, Fla. +, Ga. +, Miss. +  and S.C. +
0–200 m +
Moist pinewoods, grassy bogs, pond margins, ditches +
Flowering late spring–summer (May–Jul), sometimes fall. +
in J. Lamarck et al., Encycl. +
Brathydium myrtifolium +, Hypericum glaucum +, H. sessiliflorum +  and Myriandra glauca +
Hypericum myrtifolium +
Hypericum sect. Myriandra +
species +