Hypericum lloydii |
Hypericum crux-andreae |
|
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sandhill St. Johnswort |
Atlantic St. Peter's-wort, St. Peter's wort |
|
Habit | Shrubs, decumbent, straggling and rooting, forming low, rounded clumps or mats, 1–5 dm. | Shrubs, usually erect to suberect, rarely decumbent and rooting, usually unbranched, rarely sparsely branched distally, 1–13.5 dm. |
Stems | internodes (4-) or 6-lined at first, then terete. |
internodes 2–4-lined at first, then 2-winged. |
Leaf | blades linear-subulate, 13–25 × 0.5–0.8 mm, base articulated, parallel, margins revolute, apex rounded to retuse, midrib unbranched. |
blades usually oblong to elliptic, rarely obovate to oblanceolate or triangular-ovate, 12–36 × 6–16 mm, base articulated, rounded to slightly cordate-amplexicaul, without glandlike auricles, margins plane to subrecurved, apex rounded to obtuse, midrib with to 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. |
± narrowly cylindric to narrowly pyramidal, 1–3(–7)-flowered, branching dichasial, from to 4 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 to circular, 9–20 × 9–18 mm, apex apiculate or obtuse to rounded, inner narrowly elliptic to lanceolate, 7–14 × 2–4 mm, apex acute to subacute; petals 4, bright yellow, obovate, 11–18 mm; stamens persistent, 80–100; ovary 3(–4)-merous. |
Capsules | ovoid, 3–4 × 2–2.5 mm. |
narrowly ellipsoid-ovoid, 7–10 × 5–6.5 mm. |
Seeds | carinate, 0.7 mm; testa not seen. |
not carinate, 0.8 mm; testa shallowly scalariform. |
2n | = 18. |
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Hypericum lloydii |
Hypericum crux-andreae |
|
Phenology | Flowering summer (Aug). | Flowering summer–fall. |
Habitat | Dry habitats (pine woods, granite outcrops, roadside embankments), inner coastal plain and foothills | Moist to dry, pine savannas and flatwoods, meadows, bogs, other wet habitats, lake and pond margins |
Elevation | 100–300 m (300–1000 ft) | 0–1500 m (0–4900 ft) |
Distribution |
AL; GA; NC; SC
|
AL; AR; DC; DE; FL; GA; KY; LA; MD; MS; NC; NJ; NY; OK; PA; SC; TN; TX; VA
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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 crux-andreae, long known as Ascyrum stans, is a derivative of H. frondosum in which the tetramerous tendency in the perianth has become fixed. The low, multistemmed form with cuneate leaves, longer- pedicellate flowers, and shorter sepals (A. cuneifolium, A. stans var. obovatum) cannot be separated from typical H. crux-andreae. Linnaeus included “Hypericum ex terra mariana, floribus exiguis luteis” under his phrase name for Ascyrum crux-andreae; that element of the protologue refers to H. mutilum Linnaeus; see N. K. B. Robson (1980). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 79. | FNA vol. 6, p. 85. |
Parent taxa | Hypericaceae > Hypericum > sect. Myriandra | Hypericaceae > Hypericum |
Sibling taxa | ||
Synonyms | H. galioides var. lloydii | Ascyrum crux-andreae, A. cuneifolium, A. grandiflorum, A. simplex, A. stans var. obovatum, Hypericoides crux-andreae, H. stans |
Name authority | (Svenson) W. P. Adams: Contr. Gray Herb. 189: 32. (1962) | (Linnaeus) Crantz: Inst. Rei Herb. 2: 520. (1766) |
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