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sandhill St. Johnswort

peelbark St. Johnswort, sandweed

Habit Shrubs, decumbent, straggling and rooting, forming low, rounded clumps or mats, 1–5 dm. Shrubs, erect, much-branched distally, bushy, not treelike, usually forming mounds, to 15(–30) dm, bark thick, smooth, thin-corky and spongy, exfoliating in thin, papery sheets or plates.
Stems

internodes (4-) or 6-lined at first, then terete.

internodes 6-lined at first, soon 2-winged, then terete, not glaucous.

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, 8–20 × 0.7–1 mm, not glaucous, base articulated, parallel, margins revolute, apex sometimes slightly broadened, 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.

rounded-pyramidal to corymbiform, sometimes intercalary as result of resumed vegetative growth, (3–)7–32-flowered, sometimes with single flowers or 3–5-flowered dichasia 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.

13–16 mm diam.;

sepals deciduous, not enclosing capsule, 5, linear-subulate, unequal, (3–)4.5–8(–10) × 0.5 mm, not glaucous;

petals 5, bright yellow, obovate-spatulate, 6–9 mm;

stamens deciduous, 70–100;

ovary 3-merous;

styles 2.5–4 mm.

Capsules

ovoid, 3–4 × 2–2.5 mm.

± narrowly ovoid-conic to ovoid-ellipsoid, 5.5 × 2.5–3 mm.

Seeds

carinate, 0.7 mm;

testa not seen.

not carinate, 0.4 mm;

testa finely foveolate-reticulate.

2n

= 18.

Hypericum lloydii

Hypericum fasciculatum

Phenology Flowering summer (Aug). Flowering spring–fall (Apr–Nov).
Habitat Dry habitats (pine woods, granite outcrops, roadside embankments), inner coastal plain and foothills Ponds and lake margins, marshes, ditches, coastal plain
Elevation 100–300 m (300–1000 ft) 0–500 m (0–1600 ft)
Distribution
from FNA
AL; GA; NC; SC
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; FL; GA; LA; MS; NC; SC
[WildflowerSearch map]
[BONAP county map]
Discussion

The habit, leaf shape, and drier habitats distinguish Hypericum lloydii from H. galioides.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

The thick, often spongy, bark, relatively long axillary leaf clusters, paired leaf grooves flanking the midrib abaxially, broader inflorescence, and broader capsules distinguish Hypericum fasciculatum (and H. chapmanii) from H. nitidum and its relatives.

Hypericum aspalathoides Willdenow is an illegitimate name for H. fasciculatum.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 6, p. 79. FNA vol. 6, p. 81.
Parent taxa Hypericaceae > Hypericum > sect. Myriandra Hypericaceae > Hypericum > sect. Myriandra
Sibling taxa
H. adpressum, H. anagalloides, H. apocynifolium, H. ascyron, H. boreale, H. brachyphyllum, H. buckleyi, H. canadense, H. canariense, H. chapmanii, H. cistifolium, H. concinnum, H. crux-andreae, H. cumulicola, H. densiflorum, H. denticulatum, H. dolabriforme, H. drummondii, H. edisonianum, H. ellipticum, H. erythreae, H. fasciculatum, H. frondosum, H. galioides, H. gentianoides, H. graveolens, H. gymnanthum, H. harperi, H. hypericoides, H. kalmianum, H. lissophloeus, H. lobocarpum, H. maculatum, H. majus, H. microsepalum, H. mutilum, H. myrtifolium, H. nitidum, H. nudiflorum, H. paucifolium, H. perforatum, H. prolificum, H. pseudomaculatum, H. punctatum, H. radfordiorum, H. scouleri, H. setosum, H. sphaerocarpum, H. suffruticosum, H. tenuifolium, H. tetrapetalum, H. virgatum, H. ×mitchellianum
H. adpressum, H. anagalloides, H. apocynifolium, H. ascyron, H. boreale, H. brachyphyllum, H. buckleyi, H. canadense, H. canariense, H. chapmanii, H. cistifolium, H. concinnum, H. crux-andreae, H. cumulicola, H. densiflorum, H. denticulatum, H. dolabriforme, H. drummondii, H. edisonianum, H. ellipticum, H. erythreae, H. frondosum, H. galioides, H. gentianoides, H. graveolens, H. gymnanthum, H. harperi, H. hypericoides, H. kalmianum, H. lissophloeus, H. lloydii, H. lobocarpum, H. maculatum, H. majus, H. microsepalum, H. mutilum, H. myrtifolium, H. nitidum, H. nudiflorum, H. paucifolium, H. perforatum, H. prolificum, H. pseudomaculatum, H. punctatum, H. radfordiorum, H. scouleri, H. setosum, H. sphaerocarpum, H. suffruticosum, H. tenuifolium, H. tetrapetalum, H. virgatum, H. ×mitchellianum
Synonyms H. galioides var. lloydii H. fasciculatum var. aspalathoides, H. fulgidum, H. galioides var. fasciculatum
Name authority (Svenson) W. P. Adams: Contr. Gray Herb. 189: 32. (1962) Lamarck: in J. Lamarck et al., Encycl. 4: 160. (1797)
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