Hypericum lloydii |
Hypericum tetrapetalum |
|
---|---|---|
sandhill St. Johnswort |
fourpetal St. Johnswort |
|
Habit | Shrubs, decumbent, straggling and rooting, forming low, rounded clumps or mats, 1–5 dm. | Herbs (perennial) or shrubs, erect, with woody base, usually unbranched, sometimes with divaricate or ascending branches, 2–10 dm. |
Stems | internodes (4-) or 6-lined at first, then terete. |
internodes (2–)4-lined at first, then 2-lined to terete. |
Leaf | blades linear-subulate, 13–25 × 0.5–0.8 mm, base articulated, parallel, margins revolute, apex rounded to retuse, midrib unbranched. |
blades oblong-ovate to ovate or triangular-ovate, 5–35 × 4–15 mm, base articulated, cordate-amplexicaul, margins subrecurved, apex apiculate or obtuse to rounded, midrib with 1 pair 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. |
terminal, 1(–3)-flowered, branching from apical node pseudodichotomous, sometimes with relatively short branches from to 3 proximal nodes. |
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. |
20–30 mm diam.; sepals persistent, enclosing capsule, 4, unequal, outer broadly ovate, 7–15 × 5.5–10 mm, apex subapiculate to obtuse, inner narrowly lanceolate, 7–15 × 2–3 mm, apex acute; petals 4, bright yellow, obovate-oblong, 10–15 mm; stamens persistent, 100; ovary 3-merous. |
Capsules | ovoid, 3–4 × 2–2.5 mm. |
broadly ellipsoid-ovoid to subglobose, 5–6 × 3.5–4 mm. |
Seeds | carinate, 0.7 mm; testa not seen. |
not carinate, 0.7 mm; testa shallowly scalariform. |
2n | = 18. |
|
Hypericum lloydii |
Hypericum tetrapetalum |
|
Phenology | Flowering summer (Aug). | Flowering winter–spring (Jan–Apr), late summer (Jul–Sep). |
Habitat | Dry habitats (pine woods, granite outcrops, roadside embankments), inner coastal plain and foothills | Moist, low pinelands, ditches |
Elevation | 100–300 m (300–1000 ft) | 0–200 m (0–700 ft) |
Distribution |
AL; GA; NC; SC
|
AL; FL; GA; West Indies (w Cuba)
|
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 tetrapetalum differs from H. crux-andreae in having broader leaves with strongly cordate-amplexicaul bases and, nearly always, by terminal pseudodichotomous inflorescences. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 79. | FNA vol. 6, p. 86. |
Parent taxa | Hypericaceae > Hypericum > sect. Myriandra | Hypericaceae > Hypericum > sect. Myriandra |
Sibling taxa | ||
Synonyms | H. galioides var. lloydii | Ascyrum amplexicaule, A. cubense, A. tetrapetalum |
Name authority | (Svenson) W. P. Adams: Contr. Gray Herb. 189: 32. (1962) | Lamarck: in J. Lamarck et al., Encycl. 4: 153. (1797) |
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