Hypericum dolabriforme

Ventenat

Descr. Pl. Nouv., plate 45. 1801.

Endemic
Synonyms: Brathydium dolabriforme (Ventenat) Y. Kimura Hypericum bissellii B. L. Robinson H. procumbens Desfontaines ex Willdenow
Treatment appears in FNA Volume 6. Treatment on page 84. Mentioned on page 74, 85.

Subshrubs, decumbent and woody (not rooting) at base, branching at base or throughout, 1.5–5 dm, bark thin. Stems: internodes 4-lined at first, then 2-lined to terete. Leaf-blades linear-elliptic or linear-oblong to linear, 20–35 × 3–5 mm (main-stem), base not articulated, narrowly cuneate to rounded, margins recurved to revolute, apex obtuse to acute, midrib unbranched. Inflorescences obconic, (1–) 3–20-flowered, ± widely branched, sometimes with single flowers at immediately proximal nodes. Flowers 15–20 mm diam.; sepals persistent, not enclosing capsule, 5, ovatelanceolate to lanceolate, ± foliaceous, unequal, 5–8 (–15) × 2–3 (–8) mm; petals 5, yellow, curved-dolabriform, 10–13 mm; stamens deciduous, 120–200; ovary 3-merous. Capsules ovoid-conic, rostrate, 4–9 × 3–4 mm. Seeds carinate, 1.5–1.8 mm; testa reticulate-scalariform. 2n = 18.


Phenology: Flowering summer (Jun–Sep).
Habitat: Limestone outcrops, cedar glades, dry, rocky stream beds
Elevation: 0–500 m

Distribution

V6 139-distribution-map.jpg

Conn., Ga., Ind., Ky., Tenn.

Discussion

Hypericum dolabriforme is superficially similar to H. sphaerocarpum, to which W. P. Adams (1962) related it. Apart from the narrow leaves and unequal sepals, it is much nearer morphologically to H. myrtifolium (for example, in the wide-spreading inflorescence, numbers of stamens, and ovoid-conic capsules). Hypericum bissellii, described from a plant growing in Southington, Connecticut, is unlikely to be indigenous in that state.

Selected References

None.

Lower Taxa

None.

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

... more about "Hypericum dolabriforme"
reddish +  and black +
yellow;orange +
oblong;ellipsoid +
obtuse;acute +
Norman K. B. Robson +
Ventenat +
striate +  and smooth +
punctiform +
not articulated +
distinct +
narrowly cuneate +  and rounded +
Undefined sect. Myriandra +
0.4 cm4 mm <br />0.004 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
rostrate;ovoid-conic +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Conn. +, Ga. +, Ind. +, Ky. +  and Tenn. +
0–500 m +
connate +  and distinct +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Limestone outcrops, cedar glades, dry, rocky stream beds +
branched +  and (1-)3-20-flowered +
axillary +  and terminal +
2-lined +  and 4-lined +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
linear-oblong;linear +
glanduliferous +, petiolate +, pseudopetiolate +, subsessile +, sessile +, estipulate +  and simple +
persistent +  and deciduous +
glandular-ciliate +
incompletely axile +  and parietal +
glanduliferous +
contorted +  and imbricate +
deciduous +
distinct +
curved-dolabriform +
1 cm10 mm <br />0.01 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
Flowering summer (Jun–Sep). +
Descr. Pl. Nouv., plate +
carinate +
0.15 cm1.5 mm <br />0.0015 m <br /> (?) +  and 0.18 cm1.8 mm <br />0.0018 m <br /> (?) +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
persistent +
connate +  and distinct +
ovatelanceolate;lanceolate +
unequal +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
connate +  and distinct +
spreading;more or less appressed +
elongate +
Brathydium dolabriforme +, Hypericum bissellii +  and H. procumbens +
Hypericum dolabriforme +
Hypericum sect. Myriandra +
species +
reticulate-scalariform +
reticulate +  and foveolate +
perennial +  and annual +
hairy +  and glabrous +
6 +, 9 +  and 7 +