Hypericum lloydii |
Hypericum denticulatum |
|
---|---|---|
sandhill St. Johnswort |
coppery St. John's wort |
|
Habit | Shrubs, decumbent, straggling and rooting, forming low, rounded clumps or mats, 1–5 dm. | Herbs perennial, erect, branching at usually aerenchymatous base and in inflorescence, 2–7 dm. |
Stems | internodes (4-) or 6-lined at first, then terete. |
internodes 4-lined. |
Leaves | blades linear-subulate, 13–25 × 0.5–0.8 mm, base articulated, parallel, margins revolute, apex rounded to retuse, midrib unbranched. |
(main stem) spreading to appressed, sessile; blade usually broadly to narrowly ovate, rarely elliptic or lanceolate, 4–20 × 5–15(–18) mm, mostly shorter than internodes, leathery, margins plane, apex acute to subrounded, densely gland-dotted, basal veins 1–5, if 1, midrib with 2–3 pairs of branches. |
Inflorescences | narrowly pyramidal, 1–3-flowered, with 1–3(–5)-flowered dichasia from to 5 proximal nodes, without additional flowering branches; pedicels 0.5 mm. |
broadly pyramidal to corymbiform, to 25-flowered, branching mostly dichasial. |
Flowers | 12–14 mm diam.; sepals deciduous, not enclosing capsule, 5, linear-subulate, unequal, (3–)4.5–7 × 0.5–0.8 mm; petals 5, golden yellow, oblanceolate-oblong, 5–7.5 mm; stamens deciduous, 100; ovary 3-merous. |
5–13 mm diam.; sepals ovate or lanceolate to elliptic or obovate, subequal, 3–8 × 1.5–4 mm, margins sometimes ciliate, not setulose-ciliate, apex acute; petals orange-yellow, obovate, 5–10 mm; stamens 50–80, irregularly grouped; styles 2–4 mm; stigmas clavate. |
Capsules | ovoid, 3–4 × 2–2.5 mm. |
ovoid to rostrate-subglobose, 3–5 × 2–3 mm. |
Seeds | carinate, 0.7 mm; testa not seen. |
0.4–0.7 mm; testa obscurely linear-reticulate to finely ribbed-scalariform. |
Hypericum lloydii |
Hypericum denticulatum |
|
Phenology | Flowering summer (Aug). | Flowering summer–early fall (Jun–Sep). |
Habitat | Dry habitats (pine woods, granite outcrops, roadside embankments), inner coastal plain and foothills | Wet woods, marshes, bogs |
Elevation | 100–300 m (300–1000 ft) | 0–400 m (0–1300 ft) |
Distribution |
AL; GA; NC; SC
|
AL; DE; GA; NC; NJ; NY; PA; SC; TN; VA
|
Discussion | The habit, leaf shape, and drier habitats distinguish Hypericum lloydii from H. galioides. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
D. H. Webb (1980) regarded the disjunct populations in North Carolina and Tennessee as possible relicts and the Alabama one as due to recent introduction. J. R. Allison (2011) agreed and, in his opinion, the Pennsylvania and Virginia records are historical, and Hypericum denticulatum is likely adventive in Georgia. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 79. | FNA vol. 6, p. 89. |
Parent taxa | Hypericaceae > Hypericum > sect. Myriandra | Hypericaceae > Hypericum > sect. Brathys |
Sibling taxa | ||
Synonyms | H. galioides var. lloydii | H. angulosum, H. denticulatum var. ovalifolium, H. laevigatum, H. virgatum var. ovalifolium |
Name authority | (Svenson) W. P. Adams: Contr. Gray Herb. 189: 32. (1962) | Walter: Fl. Carol., 190. (1788) |
Web links |