Herbs (perennial), subshrubs, or shrubs; black glands absent. Leaves deciduous (base articulated) or persistent (base not articulated). Flowers 7–45 mm diam.; sepals deciduous or persistent, (2–)4–5; petals deciduous, (3–)4–5; stamens usually persistent, sometimes deciduous, 30–650, in continuous ring or in 4–5 barely discernable fascicles, each of 1–2 stamens; ovary 2–5-merous; placentation incompletely axile to parietal; styles ± appressed, bases distinct; stigmas minute. Seeds ± carinate or not.


e North America, e Mexico, West Indies (Bahamas, Greater Antilles), Bermuda, Central America (Belize).


Species 29 (28 in the flora).

Hypericum limosum Grisebach is endemic to western Cuba.

Selected References



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