Hypericum lloydii |
Hypericum tenuifolium |
|
---|---|---|
sandhill St. Johnswort |
Atlantic St. John's-wort |
|
Habit | Shrubs, decumbent, straggling and rooting, forming low, rounded clumps or mats, 1–5 dm. | Shrubs, usually decumbent, not rooting, forming mats, 1–5 dm. |
Stems | internodes (4-) or 6-lined at first, then terete. |
internodes 6-lined at first, becoming 4-lined, then terete. |
Leaf | blades linear-subulate, 13–25 × 0.5–0.8 mm, base articulated, parallel, margins revolute, apex rounded to retuse, midrib unbranched. |
blades linear-subulate, 4–11 × 0.4–0.8 mm, base articulated, persistent, parallel or slightly expanded, margins revolute, apex rounded with ± prominent hydathode to long-acuminate, midrib unbranched. |
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. |
± narrowly cylindric, 1–7-flowered, with 1(–3)-flowered dichasia from to 4 proximal nodes, rarely with 1 pair of flowering branches; flowers sessile or nearly so. |
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. |
10–14 mm diam.; sepals deciduous, not enclosing capsule, 5, linear-subulate, unequal, 2–4 × 0.4–0.5 mm; petals 5, bright yellow, oblanceolate-oblong to obovate, 5–10 mm; stamens deciduous, 50–90; ovary 3-merous. |
Capsules | ovoid, 3–4 × 2–2.5 mm. |
narrowly (sub-)cylindric, (4–)5.7–9.5 × 1.5–2 mm. |
Seeds | carinate, 0.7 mm; testa not seen. |
scarcely carinate, 0.5 mm; testa coarsely reticulate. |
2n | = 18. |
|
Hypericum lloydii |
Hypericum tenuifolium |
|
Phenology | Flowering summer (Aug). | Flowering spring–mid summer (Apr–Jul). |
Habitat | Dry habitats (pine woods, granite outcrops, roadside embankments), inner coastal plain and foothills | Dry, sandy woods, dunes and dune hollows, coastal plain |
Elevation | 100–300 m (300–1000 ft) | 0–200 m (0–700 ft) |
Distribution |
AL; GA; NC; SC
|
AL; FL; GA; NC; SC
|
Discussion | The habit, leaf shape, and drier habitats distinguish Hypericum lloydii from H. galioides. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Hypericum tenuifolium differs from H. galioides in habit, leaf size, and inflorescence, and in its drier habitat. Its nonrooting stems, longer leaves, and (usually) longer stems distinguish it from H. lloydii. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 79. | FNA vol. 6, p. 79. |
Parent taxa | Hypericaceae > Hypericum > sect. Myriandra | Hypericaceae > Hypericum > sect. Myriandra |
Sibling taxa | ||
Synonyms | H. galioides var. lloydii | H. fasciculatum var. laxifolium, H. reductum |
Name authority | (Svenson) W. P. Adams: Contr. Gray Herb. 189: 32. (1962) | Pursh: Fl. Amer. Sept. 2: 377. (1813) |
Web links |