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Key to Hypericum, Key G: herbaceous St. John's-worts with broad leaves, 1-locular capsules, stamens separate or connate at base, but not grouped into fascicles, leaves with translucent dots, without black dots, sepals and petals with translucent lines or dots only, not marked with black dots or lines

Hypericaceae

Hypericum

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1 Stems and leaves pubescent; [section Trigynobrathys]
1 Stems and leaves glabrous.
  2 Style united, persistent as a single straight beak on the capsule; [section Myriandra, subsection Suturosperma].
    3 Leaves 3-6 cm long, 4-6× as long as wide, the margin revolute
    3 Leaves 1-3 (-4) cm long, 2-3× as long as wide, the margin not revolute
  2 Style separate, more or less divergent, not persistent as a beak on the capsule; [section Trigynobrathys].
      4 Style 2-4 (-5) mm long; stamen (35-) 50-80; petal orange-yellow or burnt yellow.
        5 Stamen 35-50; style 2.5-5 mm long; leaves 0.5-2 mm long; [s. TX]
        5 Stamen (35-) 50-80; style 2-4 mm long; leaves 3-18 mm wide; [s. IL, s. AR, and e. LA eastwards]
          6 Punctate gland absent on the stem (rarely very few on the internode of the inflorescence); punctate gland of the leaves small, round, distributed on the lower leaf surface, becoming sparse toward the base of the leaf and toward the midrib; midstem leaves mostly broadest at or beyond the middle
          6 Punctate gland frequent on the stem; punctate gland of the leaves and stem large, oval, distributed evenly and densely on the lower leaf surface, also dense on the upper leaf surface in H. denticulatum and H. harperi (absent on upper leaf surface in H. species 1); midstem leaves usually broadest at or below the middle.
             7 Upper surface of the leaf with no punctate gland; inflorescence branches typically with 3-12 pairs of bracteal leaves about 1/2 as large as the foliage leaves; [of shallow soil mats on granitic domes in the upper Piedmont of NC]
             7 Upper surface of the leaf with abundant punctate gland; inflorescence branches with at most a few pairs of very small bract; [of Coastal Plain wetlands, very rarely disjunct inland and then in wetlands].
               8 Leaves 10-35 (-40) mm long, 3-8 (-12) mm wide, 3-10× as long as wide, lanceolate to linear-lanceolate, mostly ascending to spreading, often equaling the internode; sepal 3.0-5.0 mm long, 0.8-2.5 mm wide, acute to acuminate; lanceolate to linear-lanceolate; upper portion of stem with numerous axillary branches; lower stem usually spongy-thickened with aerenchymatous tissue; [of upland depression pond of the Coastal Plain, growing where seasonally inundated]
               8 Leaves 5-20 (-24) mm long, 5-15 mm wide, 1.2-2.5× as long as wide, ovate to obovate to narrowly elliptic, mostly appressed to the stem, mostly shorter than the internode; sepal 3.0-8.0 mm long, 1.5-4.0 mm wide, acute; lower stem not spongy-thickened with aerenchymatous tissue (or slightly so in H. erythreae); [of moist pinelands of the Coastal Plain, very rarely disjunct inland to bog habitats in the Piedmont and Mountains].
                 9 Sepal 3-8 mm long; plants 2-7 dm tall
                 9 Sepal 3.5-4.2 (-4.8) mm long; plants 3-12 dm tall
      4 Style 0.5-1.5 mm long; stamen 5-22; petal bright golden-yellow.
                   10 Leaves lanceolate to linear, 6-30 mm long, 0.5-6 mm wide, the leaf base attenuate to cuneate
                     11 Leaves linear, the margin parallel or nearly so, 0.5-3 mm wide; capsule 3-6.5 mm long
                     11 Leaves lanceolate, the margin curved, 2-6 mm wide; capsule 3-4.5 mm long
                   10 Leaves ovate to elliptic, 3-35 mm long, 2-15 mm wide, the leaf base rounded to cordate-clasping.
                       12 Sepal broadest near the base; inflorescence with few or no normally sized leaves, these only low in the inflorescence, giving the inflorescence a naked appearance.
                          13 Leaves rounded to subcordate at the base; outermost leaf veins diverging at their base at nearly right angles from the midvein; [primarily of Coastal Plain pinelands, north to NJ, PA, OH, IN, IL, and MO]
                          13 Leaves rounded or obtuse at the base; outermost leaf veins strongly ascending from their base; [south to NJ, DE, PA, OH, n. IN, n. IL, n. MO, and OK]
                       12 Sepal broadest near the middle; inflorescence with many normally sized leaves and leaflike bract, giving the inflorescence a leafy appearance.
                            14 Ultimate bract of the inflorescence elliptic, much like the leaves; leaves not paler beneath; sepal obtuse, much shorter than the capsule; capsule 3-5 mm long
                            14 Ultimate bract of the inflorescence linear, differing conspicuously from the leaves; leaves paler beneath; sepal acute, about equaling the capsule; capsule 2-3.5 mm long.
                              15 Inflorescence branches from the upper 1-6 node of the stem, the further branching repeatedly monochasial; stem with apical internode well developed, usually longer than the internode below; sepal broader above the middle, more-or-less imbricate; [of the Coastal Plain]
                              15 Inflorescence branches from the upper 2-10 node of the stem, the further branching mostly dichasial; stem with apical internode shorter than the internode below or even essentially absent; sepal broader below the middle, not imbricate (rarely broader above the middle and imbricate); [widespread]