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sparse-leaf St. Johnswort

Habit Herbs perennial, erect to ascending, branching at ± aerenchymatous base and in inflorescence, 3–12 dm.
Stems

internodes 4-lined.

Leaves

ascending to appressed, sessile;

blade usually lanceolate, rarely elliptic to ovate, 5–20(–24) × 5–15 mm, shorter than internodes, smaller distally, leathery, margins plane, apex acute, gland-dotted, less conspicuously adaxially, basal veins 1–5, midrib with 2–3 pairs of branches.

Inflorescences

corymbiform, to 30-flowered, branching mostly dichasial.

Flowers

5–13 mm diam.;

sepals lanceolate, unequal, 3.5–4.2(–4.8) mm, margins sometimes ciliate, not setulose-ciliate, apex acute to subacuminate;

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

stamens 50–80, filaments basally connate;

styles 2–4 mm;

stigmas clavate.

Capsules

ovoid, 3–4.5 mm.

Seeds

0.4–0.7 mm;

testa reticulate.

Hypericum erythreae

Phenology Flowering mid summer–fall (Jul–Oct).
Habitat Bogs, ditches, coastal plain
Elevation 0–300 m (0–1000 ft)
Distribution
from FNA
GA; SC
Source FNA vol. 6, p. 90.
Parent taxa Hypericaceae > Hypericum > sect. Brathys
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. 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. suffruticosum, H. tenuifolium, H. tetrapetalum, H. virgatum, H. ×mitchellianum
Synonyms Brathys erythreae
Name authority (Spach) Steudel: Nomencl. Bot. ed. 2, 1: 787. (1840)
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