Hypericum lloydii |
Hypericum sphaerocarpum |
|
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sandhill St. Johnswort |
round-fruit St. John's-wort, roundseed St. Johnswort |
|
Habit | Shrubs, decumbent, straggling and rooting, forming low, rounded clumps or mats, 1–5 dm. | Herbs (perennial) or subshrubs, erect or decumbent, not or rarely rhizomatous, unbranched or branched proximally, 2–6 dm. |
Stems | internodes (4-) or 6-lined at first, then terete. |
internodes 2–4-lined. |
Leaf | blades linear-subulate, 13–25 × 0.5–0.8 mm, base articulated, parallel, margins revolute, apex rounded to retuse, midrib unbranched. |
blades narrowly elliptic or narrowly oblong to linear, 30–70 × 3–15 mm, base not articulated, narrowly cuneate to linear, margins plane to revolute, apex subacute to rounded, midrib with 0–4 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. |
rounded-corymbiform, 7–70-flowered, narrowly branched, sometimes with dichasia or branches from to 8 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. |
10–15 mm diam.; sepals persistent, not enclosing capsule, 5, broadly ovate to oblong-elliptic, ± unequal, 2.5–5 × 1.5–3 mm; petals 5, bright yellow, oblanceolate-elliptic to elliptic, 5–9 mm; stamens persistent, 45–85; ovary 3-merous, placentation parietal. |
Capsules | ovoid, 3–4 × 2–2.5 mm. |
broadly ovoid to depressed-globose, 4.5–8 × 4–7 mm. |
Seeds | carinate, 0.7 mm; testa not seen. |
carinate, 2–2.7 mm; testa coarsely reticulate. |
Hypericum lloydii |
Hypericum sphaerocarpum |
|
Phenology | Flowering summer (Aug). | Flowering summer (Jun–Aug). |
Habitat | Dry habitats (pine woods, granite outcrops, roadside embankments), inner coastal plain and foothills | Rocky outcrops or embankments, prairies, stream banks, usually wet or moist, railroad embankments |
Elevation | 100–300 m (300–1000 ft) | 500–1000 m (1600–3300 ft) |
Distribution |
AL; GA; NC; SC
|
AL; AR; IA; IL; IN; KS; KY; MI; MO; MS; NE; OH; OK; TN; TX; WI; ON
|
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 sphaerocarpum differs from H. cistifolium and H. nudiflorum in its semiherbaceous habit and more northwestern distribution, as well as in its combination of relatively long, narrow leaves, persistent sepals, globose and apiculate to rounded capsules, and relatively large seeds. The narrow-leaved, bushy form from eastern parts of the range (var. turgidum) merges with the typical form. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 79. | FNA vol. 6, p. 83. |
Parent taxa | Hypericaceae > Hypericum > sect. Myriandra | Hypericaceae > Hypericum > sect. Myriandra |
Sibling taxa | ||
Synonyms | H. galioides var. lloydii | Brathydium chamaenerium, B. sphaerocarpum, H. chamaenerium, H. sphaerocarpum var. turgidum, H. turgidum |
Name authority | (Svenson) W. P. Adams: Contr. Gray Herb. 189: 32. (1962) | Michaux: Fl. Bor.-Amer. 2: 78. (1803) |
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