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Drummond's St. Johnswort, nits and lice

Habit Herbs perennial, semiaquatic or aquatic, erect, branching with long-creeping rhizomes at aerenchymatous base and from mid and distal nodes, 3–10 dm. Herbs annual, erect, branches strict, in distal 1/2, 1–8 dm, wiry.
Stems

internodes 4-lined.

internodes 4-lined.

Leaves

ascending to deflexed, sessile;

blade narrowly oblong-elliptic (proximal) or lanceolate to linear-lanceolate, 10–30 × 3–8 mm, mostly longer than internodes, not or scarcely smaller distally, leathery, margins plane, apex acute, basal or near-basal veins 1–3(–5), midrib with 0–2 pairs of branches.

erect to suberect, sessile;

blade linear or linear-subulate to linear-lanceolate, 5–22 × 0.5–1 mm, subcoriaceous, margins recurved to revolute, apex acute to obtuse, basal vein 1, midrib unbranched.

Inflorescences

broadly pyramidal to subcorymbiform, 1(–30)-flowered, branching mostly dichasial.

narrowly to broadly triangular, 1–12-flowered, branching mostly monochasial.

Flowers

4–10 mm diam.;

sepals lanceolate, usually unequal, 3–5 × 0.8–1 mm, margins sometimes ciliate, not setulose-ciliate, apex acute to acuminate;

petals orange-yellow, obovate, 6–10 mm;

stamens 50–80, irregularly grouped;

styles 2–4 mm;

stigmas capitate.

5–8 mm diam.;

sepals narrowly oblong to linear-lanceolate, subequal, 3–7 × 0.7–1.3 mm, apex acute;

petals golden yellow to orange-yellow, oblong, 4–7 mm;

stamens 10–22, separate or obscurely 3-fascicled;

styles (0.5–)0.8–1.5 mm;

stigmas broadly capitate.

Capsules

ellipsoid to rostrate-subglobose, 3–4.5 × 2–2.5 mm.

narrowly ovoid to ovoid-cylindric, 3.5–7 × 2.5–3 mm, length 1–1.2 times sepals.

Seeds

0.5–0.6(–0.7) mm;

testa obscurely linear-reticulate to irregularly reticulate.

0.9–1.1 mm;

testa finely scalariform.

2n

= 24.

= 24.

Hypericum harperi

Hypericum drummondii

Phenology Flowering mid–late summer (Jul–Sep). Flowering summer–early fall (Jul–Sep).
Habitat Open Taxodium swamps, wet pine barrens Dry, sandy or clay soil in open woods, old fields, waste or rocky places
Elevation 0–200 m (0–700 ft) 0–1100 m (0–3600 ft)
Distribution
from FNA
AL; FL; GA; SC
[BONAP county map]
from FNA
AL; AR; FL; GA; IA; IL; IN; KS; KY; LA; MO; MS; NC; OH; OK; SC; TN; TX; VA
[WildflowerSearch map]
[BONAP county map]
Discussion

Hypericum drummondii is closely related to H. gentianoides.

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

Source FNA vol. 6, p. 90. FNA vol. 6, p. 95.
Parent taxa Hypericaceae > Hypericum > sect. Brathys 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. erythreae, H. fasciculatum, H. frondosum, H. galioides, H. gentianoides, H. graveolens, H. gymnanthum, 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
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. 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. suffruticosum, H. tenuifolium, H. tetrapetalum, H. virgatum, H. ×mitchellianum
Synonyms Sarothra drummondii, Brathys drummondii
Name authority R. Keller: Bot. Jahrb. Syst. 58: 198. (1923) (Greville & Hooker) Torrey & A. Gray: Fl. N. Amer. 1: 165. (1838)
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