1 |
Sepals enclosing capsule, (2–)4, unequal (outer pair larger) [subsect. Ascyrum] |
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(2) |
+ |
Sepals not enclosing capsule, usually 5, if 3 or 4, usually subequal |
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(6) |
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2 (1) |
Stamens 30–50; ovaries 2-merous |
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(3) |
+ |
Stamens 70–100; ovaries 3(4)-merous |
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(4) |
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3 (2) |
Leaf bases without glandlike auricles; inflorescences 1-flowered, pedicels mostly recurved to reflexed in fruit, bracteoles proximal. |
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27 Hypericum suffruticosum |
+ |
Leaf bases with glandlike auricles; inflorescences 1–12-flowered, pedicels erect in fruit, bracteoles distal. |
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28 Hypericum hypericoides |
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4 (2) |
Leaf bases cordate-amplexicaul; inflorescences terminal, branching (at apical node) pseudodichotomous |
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25. Hypericum tetrapetalum |
+ |
Leaf bases usually cuneate to subrounded, rarely rounded to slightly subcordate-amplexicaul; inflorescences from 1–4 nodes, branching dichasial or pseudodichotomous |
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(5) |
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5 (4) |
Leaves: bases without glandlike auricles, margins plane to subrecurved; inflorescences 1–3(–7)-flowered, branching dichasial; outer sepals: apices apiculate or obtuse to rounded |
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24. Hypericum crux-andreae |
+ |
Leaves: bases with glandlike auricles, margins subrecurved to subincrassate; inflorescences 1-flowered, branching pseudodichotomous; outer sepals: apices acute to subacuminate |
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26. Hypericum edisonianum |
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6 (1) |
Leaves: bases usually not articulated, if articulated (22. H. myrtifolium), subcordate-amplexicaul; stamens (all or some) usually persistent (deciduous in H. apocynifolium, H. myrtifolium, and H. dolabriforme) |
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+ |
Leaves: base articulated, not amplexicaul; stamens deciduous [subsect. Centrosperma] |
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(16) |
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7 |
Shrubs, decumbent, mat-forming, wiry; inflorescences 1(–5)-flowered [subsect. Pseudobrathydium]. |
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14 Hypericum buckleyi |
+ |
Herbs, subshrubs, or shrubs, erect to ascending or decumbent, not mat-forming, not wiry; inflorescences (1–)3–70-flowered |
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(8) |
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8 (7) |
Inflorescences widely branched; stamens 120–200 [subsect. Brathydium] |
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(9) |
+ |
Inflorescences narrowly branched; stamens 30–95 [subsect. Suturosperma] |
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(10) |
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9 (8) |
Shrubs, erect, unbranched or branched distally, bark corky; leaf blades oblong-ovate to triangular-lanceolate, (5–)7–20 mm wide, bases articulated, subcordate-amplexicaul. |
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22 Hypericum myrtifolium |
+ |
Subshrubs, decumbent, ± branching, bark not corky (thin); leaf blades linear-elliptic or linear-oblong to linear, 3–5 mm wide, bases not articulated, narrowly cuneate to rounded. |
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23 Hypericum dolabriforme |
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10 (8) |
Leaf blades (7–)10–25 mm wide; sepals deciduous or tardily deciduous; placentation incompletely axile |
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(11) |
+ |
Leaf blades 1–10(–15) mm wide; sepals persistent; placentation parietal |
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(12) |
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11 (10) |
Inflorescences terminal, (1–)3–5(–8)-flowered; sepals tardily deciduous, 1.5–2.3 mm wide; capsules 6–15 × 4.5–8 mm. |
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15 Hypericum apocynifolium |
+ |
Inflorescences from 1–3 nodes, the terminal 7–45-flowered; sepals deciduous, 1–1.5 mm wide; capsules 3.5–7 × 3–5 mm. |
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16 Hypericum nudiflorum |
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12 (10) |
Shrubs; leaf blades 1–3 mm wide; inflorescences 1–3-flowered; sepals (3–)4(–5). |
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18 Hypericum microsepalum |
+ |
Herbs, subshrubs, or shrubs; leaf blades (1–)3–15 mm wide; inflorescences usually 7–70-flowered, if flowers 1–6, herbs; sepals usually 5 |
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(13) |
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13 (12) |
Shrubs; capsules ovoid-cylindric to broadly ovoid. |
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17 Hypericum cistifolium |
+ |
Herbs or subshrubs; capsules usually broadly ovoid to depressed-globose, if ovoid-ellipsoid to ellipsoid or globose, rhizomatous herbs |
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(14) |
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14 (13) |
Herbs or subshrubs, not or rarely rhizomatous; capsules broadly ovoid to depressed-globose; seeds 2–2.7 mm. |
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19 Hypericum sphaerocarpum |
+ |
Herbs, rhizomatous; capsules ellipsoid to ovoid-ellipsoid or globose; seeds 0.6–0.7 mm |
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(15) |
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15 (14) |
Herbs, 2–8 dm, relatively stout; leaf blades narrowly oblong or linear to lanceolate or narrowly elliptic. |
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20 Hypericum adpressum |
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Herbs, 1–3(–5) dm, relatively slender; leaf blades elliptic or oblanceolate to oblong-elliptic. |
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21 Hypericum ellipticum |
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16 (6) |
Leaf blades usually elliptic, lanceolate, linear, oblanceolate, or oblong, (1–)3–22 mm wide; sepals usually elliptic, linear, oblanceolate, oblong, obovate, ovate, or spatulate |
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(17) |
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17 (16) |
Inflorescences usually 1–3(–7+)-flowered from apical node, sometimes with single flowers at 1(–2) proximal nodes |
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(18) |
+ |
Inflorescences usually (1–)3–25-flowered from apical node, sometimes with triads, dichasia, or flowering branches from 1–4 proximal nodes |
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(19) |
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18 (17) |
Shrubs (6–)10–30 dm; leaf blades 8–22 mm wide, margins plane or subrecurved; sepals 4–10 mm wide; ovaries 3-merous. |
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1 Hypericum frondosum |
+ |
Shrubs (1.4–)2–6(–10) dm; leaf blades 3–7(–10) mm wide, margins subrecurved to revolute; sepals 1.5–5 mm wide; ovaries (3–)5(–6)-merous. |
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3 Hypericum kalmianum |
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19 (17) |
Stem internodes 4- or 6-lined at first; inflorescences cylindric or broadly to narrowly elongate-cylindric with 1–5(–7)-flowered lateral dichasia proximally; internodes 4-lined at first and capsules 7–13 mm or internodes 6-lined at first and capsules 4.5–6 mm |
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(20) |
+ |
Stem internodes 4-lined at first; inflorescences shortly and broadly pyramidal or broadly cylindric to globose-cylindric, or obpyramidal with (2–)5–15-flowered lateral dichasia proximally; capsules 5–7 mm |
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(21) |
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20 (19) |
Leaf blades 30–70 mm, narrowly oblong to narrowly elliptic-oblanceolate; flowers 15–30 mm diam.; placentation incompletely axile; capsules 7–13 mm; seeds 1.5–2 mm. |
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2 Hypericum prolificum |
+ |
Leaf blades 15–32(–37) mm, narrowly oblong-elliptic or oblanceolate to linear; flowers 9–14 mm diam.; placentation parietal; capsules 4.5–6 mm; seeds 0.7–0.8 mm. |
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6 Hypericum galioides |
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21 (19) |
Sepals: basal veins 3–7; ovaries (3–)4–5-merous; capsules notably lobed. |
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4 Hypericum lobocarpum |
+ |
Sepals: basal veins 1–3; ovaries 3–4(–5)-merous; capsules not or scarcely lobed. |
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5 Hypericum densiflorum |
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22 |
Shrubs, erect, 3–45 dm |
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(24) |
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23 |
Leaf blades 13–25 mm; sepals (3–)4.5–7 mm. |
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7 Hypericum lloydii |
+ |
Leaf blades 4–11 mm; sepals 2–4 mm. |
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8 Hypericum tenuifolium |
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24 (22) |
Capsules usually cylindric, rarely narrowly conic or ovoid-conic; bark smooth, not metallic-silvery |
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(25) |
+ |
Capsules ± narrowly ovoid-conic or pyramidal-ovoid to ovoid or ellipsoid; bark smooth and metallic-silvery or corky to spongy |
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(26) |
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25 (24) |
Leaves 9–26 mm; styles shorter than ovaries; capsules (4.5–)5–7 mm. |
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9 Hypericum nitidum |
+ |
Leaves 6–12 mm; styles longer than ovaries; capsules 3.5–5 mm. |
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10 Hypericum brachyphyllum |
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26 (24) |
Bark smooth and metallic-silvery, exfoliating in thin, curled plates; styles 5 mm; seeds 1–1.6 mm; young stems, leaves, and sepals glaucous. |
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11 Hypericum lissophloeus |
+ |
Bark corky to spongy, exfoliating in thin, papery sheets or plates; styles 2.5–4 mm; seeds 0.4–0.8 mm; young stems, leaves, and sepals not glaucous |
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(27) |
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27 (26) |
Stems: internodes 6-lined at first, soon 2-winged, then terete; bark smooth; terminal inflorescence (3–)7–32-flowered. |
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12 Hypericum fasciculatum |
+ |
Stems: internodes 4-lined at first, soon 4-angled, then terete; bark striate; terminal inflorescence 1–3-flowered. |
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13 Hypericum chapmanii |
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