Hypericum lloydii |
Hypericum nudiflorum |
|
---|---|---|
sandhill St. Johnswort |
early St. Johnswort, naked St. Johnswort |
|
Habit | Shrubs, decumbent, straggling and rooting, forming low, rounded clumps or mats, 1–5 dm. | Subshrubs, erect, usually loosely branched with branches ascending, 5–20 dm. |
Stems | internodes (4-) or 6-lined at first, then terete. |
internodes narrowly 4-winged at first, 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 ovate-lanceolate or elliptic to linear-oblong, 30–70 × 7–25 mm, base not articulated, cuneate to subcordate, margins plane, apex obtuse to rounded, midrib with to 6 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. |
corymbiform to rounded-pyramidal, 7–45-flowered, narrowly branched, sometimes with 1–7(–40)-flowered dichasia from 1–3 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. |
15–20 mm diam.; sepals deciduous, not enclosing capsule, 5, oblanceolate-spatulate to narrowly triangular, unequal to subequal, 2–5 × 1–1.5 mm; petals 5, pale or coppery yellow, oblanceolate-oblong to elliptic-oblong, 6–8(–10) × 3–4 mm, length 2–3 times sepals; stamens persistent, 80; ovary 3(–4)-merous, placentation incompletely axile. |
Capsules | ovoid, 3–4 × 2–2.5 mm. |
broadly ellipsoid to ovoid-globose, 3.5–7 × 3–5 mm. |
Seeds | carinate, 0.7 mm; testa not seen. |
markedly carinate, 1.5–2 mm; testa ± scalariform-reticulate. |
2n | = 18. |
|
Hypericum lloydii |
Hypericum nudiflorum |
|
Phenology | Flowering summer (Aug). | Flowering summer (Jun–late Aug). |
Habitat | Dry habitats (pine woods, granite outcrops, roadside embankments), inner coastal plain and foothills | Stream banks, moist woodland, swamps |
Elevation | 100–300 m (300–1000 ft) | 0–1000 m (0–3300 ft) |
Distribution |
AL; GA; NC; SC
|
AL; FL; GA; LA; MS; NC; 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.) |
See under 15. Hypericum apocynifolium for differences between it and H. nudiflorum, which has a more eastern distribution. Records from Texas probably are referable to H. apocynifolium. Hypericum nudiflorum probably is now extirpated in Louisiana. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 79. | FNA vol. 6, p. 82. |
Parent taxa | Hypericaceae > Hypericum > sect. Myriandra | Hypericaceae > Hypericum > sect. Myriandra |
Sibling taxa | ||
Synonyms | H. galioides var. lloydii | Brathydium nudiflorum, Myriandra nudiflora |
Name authority | (Svenson) W. P. Adams: Contr. Gray Herb. 189: 32. (1962) | Michaux ex Willdenow: Sp. Pl. 3: 1456. (1802) |
Web links |