View source for Hypericum sect. Myriandra

{{Treatment/ID
|accepted_name=Hypericum sect. Myriandra
|accepted_authority=(Spach) R. Keller in H. G. A. Engler and K. Prantl
|publications={{Treatment/Publication
|title=in H. G. A. Engler and K. Prantl, Nat. Pflanzenfam.
|place=95[III,6]: 214. 1893
|year=1893
}}
|basionyms={{Treatment/ID/Synonym
|name=Undefined sect. Myriandra
|authority=Spach
}}
|synonyms=
|hierarchy=Hypericaceae;Hypericum;Hypericum sect. Myriandra
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Hypericaceae]]</div><div class="higher-taxon"><small>genus</small>[[Hypericum]]</div><div class="higher-taxon"><small>section</small>[[Hypericum sect. Myriandra]]</div></div>
|volume=Volume 6
|mention_page=page 73
|treatment_page=page 74
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs </b>(perennial), subshrubs, or shrubs; black glands absent. <b>Leaves</b> deciduous (base articulated) or persistent (base not articulated). <b>Flowers</b> 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. <b>Seeds</b> ± carinate or not.</span><!--

-->{{Treatment/Body
|distribution=e North America;e Mexico;West Indies (Bahamas;Greater Antilles);Bermuda;Central America (Belize).
|discussion=<p>Species 29 (28 in the flora).</p><!--
--><p>Hypericum limosum Grisebach is endemic to western Cuba.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Sepals enclosing capsule, (2–)4, unequal (outer pair larger) [subsect. Ascyrum]
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Sepals not enclosing capsule, usually 5, if 3 or 4, usually subequal
|[[#key-0-6| > 6]]
|-id=key-0-2
|2
|Stamens 30–50; ovaries 2-merous
|[[#key-0-3| > 3]]
|-id=key-0-2
|2
|Stamens 70–100; ovaries 3(4)-merous
|[[#key-0-4| > 4]]
|-id=key-0-3
|3
|Leaf bases without glandlike auricles; inflorescences 1-flowered, pedicels mostly recurved to reflexed in fruit, bracteoles proximal.
|[[Hypericum suffruticosum|Hypericum suffruticosum]]
|-id=key-0-3
|3
|Leaf bases with glandlike auricles; inflorescences 1–12-flowered, pedicels erect in fruit, bracteoles distal.
|[[Hypericum hypericoides|Hypericum hypericoides]]
|-id=key-0-4
|4
|Leaf bases cordate-amplexicaul; inflorescences terminal, branching (at apical node) pseudodichotomous
|[[Hypericum tetrapetalum|Hypericum tetrapetalum]]
|-id=key-0-4
|4
|Leaf bases usually cuneate to subrounded, rarely rounded to slightly subcordate-amplexicaul; inflorescences from 1–4 nodes, branching dichasial or pseudodichotomous
|[[#key-0-5| > 5]]
|-id=key-0-5
|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|Hypericum crux-andreae]]
|-id=key-0-5
|5
|Leaves: bases with glandlike auricles, margins subrecurved to subincrassate; inflorescences 1-flowered, branching pseudodichotomous; outer sepals: apices acute to subacuminate
|[[Hypericum edisonianum|Hypericum edisonianum]]
|-id=key-0-6
|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)
|[[#key-0-7| > 7]]
|-id=key-0-6
|6
|Leaves: base articulated, not amplexicaul; stamens deciduous [subsect. Centrosperma]
|[[#key-0-16| > 16]]
|-id=key-0-7
|7
|Shrubs, decumbent, mat-forming, wiry; inflorescences 1(–5)-flowered [subsect. Pseudobrathydium].
|[[Hypericum buckleyi|Hypericum buckleyi]]
|-id=key-0-7
|7
|Herbs, subshrubs, or shrubs, erect to ascending or decumbent, not mat-forming, not wiry; inflorescences (1–)3–70-flowered
|[[#key-0-8| > 8]]
|-id=key-0-8
|8
|Inflorescences widely branched; stamens 120–200 [subsect. Brathydium]
|[[#key-0-9| > 9]]
|-id=key-0-8
|8
|Inflorescences narrowly branched; stamens 30–95 [subsect. Suturosperma]
|[[#key-0-10| > 10]]
|-id=key-0-9
|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|Hypericum myrtifolium]]
|-id=key-0-9
|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|Hypericum dolabriforme]]
|-id=key-0-10
|10
|Leaf blades (7–)10–25 mm wide; sepals deciduous or tardily deciduous; placentation incompletely axile
|[[#key-0-11| > 11]]
|-id=key-0-10
|10
|Leaf blades 1–10(–15) mm wide; sepals persistent; placentation parietal
|[[#key-0-12| > 12]]
|-id=key-0-11
|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|Hypericum apocynifolium]]
|-id=key-0-11
|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|Hypericum nudiflorum]]
|-id=key-0-12
|12
|Shrubs; leaf blades 1–3 mm wide; inflorescences 1–3-flowered; sepals (3–)4(–5).
|[[Hypericum microsepalum|Hypericum microsepalum]]
|-id=key-0-12
|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
|[[#key-0-13| > 13]]
|-id=key-0-13
|13
|Shrubs; capsules ovoid-cylindric to broadly ovoid.
|[[Hypericum cistifolium|Hypericum cistifolium]]
|-id=key-0-13
|13
|Herbs or subshrubs; capsules usually broadly ovoid to depressed-globose, if ovoid-ellipsoid to ellipsoid or globose, rhizomatous herbs
|[[#key-0-14| > 14]]
|-id=key-0-14
|14
|Herbs or subshrubs, not or rarely rhizomatous; capsules broadly ovoid to depressed-globose; seeds 2–2.7 mm.
|[[Hypericum sphaerocarpum|Hypericum sphaerocarpum]]
|-id=key-0-14
|14
|Herbs, rhizomatous; capsules ellipsoid to ovoid-ellipsoid or globose; seeds 0.6–0.7 mm
|[[#key-0-15| > 15]]
|-id=key-0-15
|15
|Herbs, 2–8 dm, relatively stout; leaf blades narrowly oblong or linear to lanceolate or narrowly elliptic.
|[[Hypericum adpressum|Hypericum adpressum]]
|-id=key-0-15
|15
|Herbs, 1–3(–5) dm, relatively slender; leaf blades elliptic or oblanceolate to oblong-elliptic.
|[[Hypericum ellipticum|Hypericum ellipticum]]
|-id=key-0-16
|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
|[[#key-0-17| > 17]]
|-id=key-0-17
|17
|Inflorescences usually 1–3(–7+)-flowered from apical node, sometimes with single flowers at 1(–2) proximal nodes
|[[#key-0-18| > 18]]
|-id=key-0-17
|17
|Inflorescences usually (1–)3–25-flowered from apical node, sometimes with triads, dichasia, or flowering branches from 1–4 proximal nodes
|[[#key-0-19| > 19]]
|-id=key-0-18
|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|Hypericum frondosum]]
|-id=key-0-18
|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|Hypericum kalmianum]]
|-id=key-0-19
|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
|[[#key-0-20| > 20]]
|-id=key-0-19
|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
|[[#key-0-21| > 21]]
|-id=key-0-20
|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|Hypericum prolificum]]
|-id=key-0-20
|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|Hypericum galioides]]
|-id=key-0-21
|21
|Sepals: basal veins 3–7; ovaries (3–)4–5-merous; capsules notably lobed.
|[[Hypericum lobocarpum|Hypericum lobocarpum]]
|-id=key-0-21
|21
|Sepals: basal veins 1–3; ovaries 3–4(–5)-merous; capsules not or scarcely lobed.
|[[Hypericum densiflorum|Hypericum densiflorum]]
|-id=key-0-22
|22
|Shrubs, erect, 3–45 dm
|[[#key-0-24| > 24]]
|-id=key-0-23
|23
|Leaf blades 13–25 mm; sepals (3–)4.5–7 mm.
|[[Hypericum lloydii|Hypericum lloydii]]
|-id=key-0-23
|23
|Leaf blades 4–11 mm; sepals 2–4 mm.
|[[Hypericum tenuifolium|Hypericum tenuifolium]]
|-id=key-0-24
|24
|Capsules usually cylindric, rarely narrowly conic or ovoid-conic; bark smooth, not metallic-silvery
|[[#key-0-25| > 25]]
|-id=key-0-24
|24
|Capsules ± narrowly ovoid-conic or pyramidal-ovoid to ovoid or ellipsoid; bark smooth and metallic-silvery or corky to spongy
|[[#key-0-26| > 26]]
|-id=key-0-25
|25
|Leaves 9–26 mm; styles shorter than ovaries; capsules (4.5–)5–7 mm.
|[[Hypericum nitidum|Hypericum nitidum]]
|-id=key-0-25
|25
|Leaves 6–12 mm; styles longer than ovaries; capsules 3.5–5 mm.
|[[Hypericum brachyphyllum|Hypericum brachyphyllum]]
|-id=key-0-26
|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|Hypericum lissophloeus]]
|-id=key-0-26
|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
|[[#key-0-27| > 27]]
|-id=key-0-27
|27
|Stems: internodes 6-lined at first, soon 2-winged, then terete; bark smooth; terminal inflorescence (3–)7–32-flowered.
|[[Hypericum fasciculatum|Hypericum fasciculatum]]
|-id=key-0-27
|27
|Stems: internodes 4-lined at first, soon 4-angled, then terete; bark striate; terminal inflorescence 1–3-flowered.
|[[Hypericum chapmanii|Hypericum chapmanii]]
|}
</div></div><!--

-->{{#Taxon:
name=Hypericum sect. Myriandra
|author=
|authority=(Spach) R. Keller in H. G. A. Engler and K. Prantl
|rank=section
|parent rank=genus
|synonyms=
|basionyms=Undefined sect. Myriandra
|family=Hypericaceae
|distribution=e North America;e Mexico;West Indies (Bahamas;Greater Antilles);Bermuda;Central America (Belize).
|reference=None
|publication title=in H. G. A. Engler and K. Prantl, Nat. Pflanzenfam.
|publication year=1893
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V6/V6_115.xml
|genus=Hypericum
|section=Hypericum sect. Myriandra
}}<!--

-->[[Category:Treatment]][[Category:Hypericum]]