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brushy mountain St. Johnswort

pineland St. Johnswort

Habit Herbs perennial, erect or ± spreading, branching at base and beyond, (3–)4–7(–7.8) dm. Shrubs, erect and branched from near base, forming cushion, or decumbent and matted, 0.5–2 dm.
Stems

internodes 4-lined.

internodes 4-lined at first, soon 2-winged.

Leaves

ascending to widely spreading, sessile;

blade narrowly lanceolate (linear-lanceolate on axillary branches), 10–40(–55) × 5–10(–13) mm, longer than internodes, leathery, margins plane, apex acute to acuminate, densely gland-dotted, basal vein 1, midrib with inconspicuous branches.

blades elliptic or oblong-linear to narrowly obovate or oblanceolate, 3–10 × 1–3 mm, base not articulated, rounded to cuneate, without glandlike auricles, margins plane to subrecurved, apex obtuse, midrib unbranched.

Inflorescences

cylindric, to 40-flowered; branching mostly dichasial, subsidiary branches usually with relatively smaller leaves.

1-flowered, often with pseudodichotomous branches from apical node, without proximal branches;

pedicels mostly recurved to reflexed in fruit, bracteoles proximal.

Flowers

8–15+ mm diam.;

sepals lanceolate, unequal (outer slightly wider than inner), 3–6(–7.5) × 1.1–1.8(–2.2) mm, margins sometimes ciliate, not setulose-ciliate, apex acute or acuminate;

petals orange-yellow, obovate, 5–10 mm;

stamens 50–80, filaments basally connate;

styles 2–4 mm;

stigmas capitate.

10–15 mm diam.;

sepals persistent, enclosing capsule, (2 or) 4, unequal, outer broadly ovate to broadly elliptic, 4–8 × 4–8 mm, apex obtuse to rounded, inner none or minute;

petals 4, pale yellow, narrowly obovate, often unequal, 4–8 mm;

stamens persistent, 30;

ovary 2-merous.

Capsules

ovoid, 5 × 3–4 mm.

cylindric-ellipsoid, 3–5 × 2–3 mm.

Seeds

0.4–0.8 mm;

testa linear-pitted.

scarcely carinate, 1 mm;

testa finely reticulate.

2n

= 24.

= 18.

Hypericum radfordiorum

Hypericum suffruticosum

Phenology Flowering late spring–fall (May–)Jun–Sep(–Oct). Flowering spring–early summer (Mar–Jun).
Habitat Granitic outcrops Dry, open, sandy pinelands, coastal plain
Elevation 500–800 m (1600–2600 ft) 0–200 m (0–700 ft)
Distribution
from FNA
NC
[BONAP county map]
from FNA
AL; FL; GA; LA; MS; NC; SC
[WildflowerSearch map]
[BONAP county map]
Discussion

Hypericum suffruticosum is near the “cuneifolium” form of H. crux-andreae; it differs, among other things, by the two-merous ovary, the relatively small or absent inner sepals, the pedicels recurved or reflexed in fruit, and the cushion or matted habit.

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

Source FNA vol. 6, p. 90. FNA vol. 6, p. 86.
Parent taxa Hypericaceae > Hypericum > sect. Brathys 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. 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. 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. fasciculatum, 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. tenuifolium, H. tetrapetalum, H. virgatum, H. ×mitchellianum
Synonyms Ascyrum pumilum, A. pauciflorum
Name authority Weakley ex J. R. Allison: Castanea 76: 110, fig. 3. (2011) W. B. Adams & N. Robson: Rhodora 63: 15. (1961)
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