Hypericum apocynifolium

Small

Bull. Torrey Bot. Club 25: 616. 1898.

Endemic
Treatment appears in FNA Volume 6. Treatment on page 82. Mentioned on page 74.

Shrubs, erect, branches ascending, 4–7 dm. Stems: internodes narrowly 4-winged at first, then 2-lined. Leaf-blades oblong to elliptic-oblong, 20–40 × 12–20 mm, base not articulated, broadly cuneate, margins usually plane, rarely recurved, apex rounded to retuse, midrib with 6 pairs of branches. Inflorescences terminal (1–) 3–5 (–8) -flowered, narrowly branched. Flowers 15 mm diam.; sepals tardily deciduous, not enclosing capsule, 5, spatulate to elliptic or ovate, unequal, 3–5 × 1.5–2.3 mm; petals 5, coppery yellow, oblong, 8–10 mm length 2 times sepals; stamens deciduous, 60–80; ovary 3-merous, placentation incompletely axile. Capsules cylindric-conic, 6–15 × 4.5–8 mm. Seeds scarcely carinate, 1.8–2 mm; testa finely scalariform-reticulate.


Phenology: Flowering summer (Jun).
Habitat: Stream banks and moist woods, coastal plain and inland valleys
Elevation: 10–500 m

Distribution

V6 131-distribution-map.jpg

Ark., Fla., La., Okla., Tex.

Discussion

Hypericum apocynifolium has been included in H. nudiflorum; it can be distinguished from the latter by the fewer, larger flowers with relatively longer, persistent sepals, the larger, thicker-walled capsules, and the seeds, which are ridged and straight rather than carinate and curved.

A record from Georgia in the Flint River drainage has not been verified.

Selected References

None.

Lower Taxa

None.

"timessepals" is not declared as a valid unit of measurement for this property.

... more about "Hypericum apocynifolium"
reddish +  and black +
yellow;orange +
oblong;ellipsoid +
Norman K. B. Robson +
striate +  and smooth +
punctiform +
not articulated +
distinct +
cuneate +
Undefined sect. Myriandra +
0.6 cm6 mm <br />0.006 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
cylindric-conic +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Ark. +, Fla. +, La. +, Okla. +  and Tex. +
10–500 m +
connate +  and distinct +
15 cm150 mm <br />0.15 m <br /> (?) +
Stream banks and moist woods, coastal plain and inland valleys +
branched +  and (1-)3-5(-8)-flowered +
axillary +  and terminal +
2-lined +  and 4-winged +
terete +  and angled +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
glanduliferous +, petiolate +, pseudopetiolate +, subsessile +, sessile +, estipulate +  and simple +
persistent +  and deciduous +
glandular-ciliate +
incompletely axile +  and parietal +
glanduliferous +
contorted +  and imbricate +
deciduous +
distinct +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering summer (Jun). +
Bull. Torrey Bot. Club +
carinate +
1.8mm +  and 2mm +
deciduous +
connate +  and distinct +
spatulate;elliptic or ovate +
unequal +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
connate +  and distinct +
spreading;more or less appressed +
elongate +
Ascyrum +, Crookea +, Sanidophyllum +  and Sarothra +
Hypericum apocynifolium +
Hypericum sect. Myriandra +
species +
scalariform +
reticulate +  and foveolate +
perennial +  and annual +
hairy +  and glabrous +
6 +, 9 +  and 7 +