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.
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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 linearlanceolate, 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

Discussion

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

None.

Lower Taxa

None.
... more about "Hypericum edisonianum"
reddish +  and black +
yellow;orange +
oblong;ellipsoid +
acuminate;acute;subacuminate +
Norman K. B. Robson +
(Small) W. P. Adams & N. Robson +
striate +  and smooth +
punctiform +
not articulated +
distinct +
cuneate +  and subrounded +
Ascyrum edisonianum +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
pyramidal-ovoid +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
connate +  and distinct +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Marshy areas in pine flatwoods, pond margins +
branching +  and 1-flowered +
axillary +  and terminal +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
2-lined +  and 4-6-lined +
terete +  and angled +
0.8 cm8 mm <br />0.008 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
glanduliferous +, petiolate +, pseudopetiolate +, subsessile +, sessile +, estipulate +  and simple +
persistent +  and deciduous +
glandular-ciliate +
0.8 cm8 mm <br />0.008 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
incompletely axile +  and parietal +
glanduliferous +
contorted +  and imbricate +
bright-yellow +
deciduous +
distinct +
obovate +
1 cm10 mm <br />0.01 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Flowering probably year-round. +
not carinate +
0.8 cm8 mm <br />0.008 m <br /> (?) +
persistent +
connate +  and distinct +
unequal +
Conservation concern +  and Endemic +
persistent +
connate +  and distinct +
spreading;more or less appressed +
elongate +
Ascyrum +, Crookea +, Sanidophyllum +  and Sarothra +
Hypericum edisonianum +
Hypericum sect. Myriandra +
species +
scalariform +
reticulate +  and foveolate +
perennial +  and annual +
hairy +  and glabrous +
6 +, 9 +  and 7 +