Hypericum edisonianum

(Small) W. P. Adams & N. Robson

Rhodora 63: 15. 1961.

Conservation concernEndemic
Basionym: Ascyrum edisonianum Small Man. S.E. Fl., 868, 1505. 1933
Treatment appears in FNA Volume 6. Treatment on page 86. Mentioned on page 74.

Shrubs, erect, sometimes unbranched proximal to inflorescence, 3–15 dm. Stems: internodes 4–6-lined at first, soon 2-lined. Leaf blades elliptic, 15–26 × 5–8(–11) mm, base not articulated, cuneate to subrounded, with glandlike auricles, margins subrecurved to subincrassate, apex obtuse to acute, midrib with to 4 pairs of branches. Inflorescences 1-flowered, branching from apical node repeatedly pseudodichotomous, without branches from proximal nodes. Flowers 15–20 mm diam.; sepals persistent, enclosing capsule, 4, unequal, outer broadly ovate, 8–17 × 5–9 mm, apex acute to subacuminate, inner linear-lanceolate, 5–6 × 0.6–1.2 mm, apex acuminate; petals 4, bright yellow, obovate, 10–18 mm; stamens persistent, 70–80; ovary 3–4-merous. Capsules narrowly pyramidal-ovoid, 5–8 × 3–4 mm. Seeds not carinate, 0.8 mm; testa reticulate.

Phenology: Flowering probably year-round.
Habitat: Marshy areas in pine flatwoods, pond margins
Elevation: 50 m


Of conservation concern.

Hypericum edisonianum differs from H. crux-andreae in the smaller, thicker, obtuse to acute leaves with glandlike auricles and the pseudodichotomously branched inflorescence.

Selected References


Lower Taxa

... more about "Hypericum edisonianum"
Norman K. B. Robson +
(Small) W. P. Adams & N. Robson +
Ascyrum edisonianum +
Marshy areas in pine flatwoods, pond margins +
Flowering probably year-round. +
Conservation concern +  and Endemic +
Ascyrum +, Crookea +, Sanidophyllum +  and Sarothra +
Hypericum edisonianum +
Hypericum sect. Myriandra +
species +