View source for Hydrangeaceae

{{Treatment/ID
|accepted_name=Hydrangeaceae
|accepted_authority=Dumortier
|publications=
|common_names=Hydrangea Family
|basionyms=
|synonyms=
|hierarchy=Hydrangeaceae
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Hydrangeaceae]]</div></div>
|volume=Volume 12
|mention_page=page 463, 485, 491
|treatment_page=page 462
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Subshrubs,</b> shrubs, trees, or vines [herbs], evergreen or deciduous. <b>Leaves</b> usually opposite, sometimes whorled [alternate], simple; stipules absent; petiole present or absent; blade sometimes palmately lobed, margins entire, serrate, serrulate, dentate, denticulate, or crenate; venation pinnate or acrodromous (<i>Fendlera</i>, <i>Fendlerella</i>, <i>Philadelphus</i>, <i>Whipplea</i>). <b>Inflorescences</b> terminal or axillary, cymes, panicles, racemes, or corymbs, or flowers solitary. <b>Flowers</b> bisexual [unisexual], or sometimes marginal ones sterile, radially symmetric (bisexual ones) or bilaterally symmetric with enlarged petaloid sepals (sterile ones); perianth and androecium nearly hypogynous, perigynous, or epigynous; hypanthium completely adnate to ovary or adnate to ovary proximally, free distally; sepals 4–12, distinct or connate basally; petals 4–12, connate basally [entirely, then calyptrate]; nectary usually present, rarely absent; stamens 8–200, usually distinct, sometimes connate proximally, free; anthers dehiscing by longitudinal slits; pistil 1, 2–12-carpellate, ovary less than 1/2 inferior, 1/2 inferior, or completely inferior, 1–12-locular, placentation usually axile proximally, parietal distally, rarely strictly axile or parietal; ovules 1–50 per locule, anatropous; styles 1–12, distinct or connate proximally to most of length; stigmas (1–)2–12. <b>Fruits</b> capsules [berries], dehiscence septicidal, loculicidal, interstylar, or intercostal. <b>Seeds</b> 1–50 per locule, funicular appendage present (<i>Fendlerella</i>, <i>Whipplea</i>) or absent.</span><!--

-->{{Treatment/Body
|distribution=North America;Mexico;Central America;South America;Eurasia;Pacific Islands.
|discussion=<p>Genera 17, species ca. 240 (9 genera, 25 species in the flora).</p><!--
--><p>A. Cronquist (1981) placed Hydrangeaceae among a group of woody families traditionally allied with Saxifragaceae. Phylogenetic studies consistently place Hydrangeaceae in the Cornales and sister to Loasaceae (A. L. Hempel et al. 1995; D. E. Soltis et al. 1995; L. Hufford et al. 2001; Hufford 2004). Within Hydrangeaceae, the western North American genera <i>Fendlera</i> and <i>Jamesia</i> form a clade (subfam. Jamesioideae L. Hufford) that is sister to the rest of the family (subfam. Hydrangeoideae Burnett) (Hufford et al.; Hufford). Subfamily Hydrangeoideae comprises two tribes: Philadelpheae de Candolle ex Duby and Hydrangeeae de Candolle. North American genera in the former are <i>Carpenteria</i>, <i>Deutzia</i>, <i>Fendlerella</i>, <i>Philadelphus</i>, and <i>Whipplea</i>. A molecular phylogenetic study by Y. De Smet et al. (2015) clarified relationships within Hydrangeeae, found <i>Hydrangea</i> to be polyphyletic, and promoted adoption of a broader concept of <i>Hydrangea</i> that includes the eight other genera in the tribe. The two North American genera in the tribe, <i>Decumaria</i> and <i>Hydrangea</i>, are circumscribed here in their traditional senses.</p><!--
--><p>The Hydrangeaceae are well represented in the paleobotanical record dating back to the Upper Cretaceous but best represented in the Tertiary (L. Hufford 2004). Some genera are sources of popular introduced or native ornamentals, including <i>Carpenteria</i>, <i>Deutzia</i>, <i>Hydrangea</i>, and <i>Philadelphus</i>. Some ornamentals have become established outside of cultivation in the flora area. A few North American Hydrangeaceae have reputed medicinal (D. E. Moerman 1998) or toxicologic (G. E. Burrows and R. J. Tyrl 2001) properties.</p><!--
--><p>Trichomes in most Hydrangeaceae consist of a long, unicellular portion, often borne on a multicellular base. The unicellular portion often bears tubercles on its surface. Sometimes instead of tubercles, it bears long extensions, making the trichome appear branched or dendritic. Such trichomes are here referred to as branched.</p>
|tables=
|references={{Treatment/Reference
|id=de2015a
|text=De Smet, Y. et al. 2015. Molecular phylogenetics and new (infra)generic classification to alleviate polyphyly in tribe Hydrangeeae (Cornales: Hydrangeaceae). Taxon 64: 741–752.
}}{{Treatment/Reference
|id=hufford1995a
|text=Hufford, L. 1995. Seed morphology of Hydrangeaceae and its phylogenetic implications. Int. J. Plant Sci. 156: 555–580.
}}{{Treatment/Reference
|id=hufford1997a
|text=Hufford, L. 1997. A phylogenetic analysis of Hydrangeaceae based on morphological data. Int. J. Plant Sci. 158: 652–672.
}}{{Treatment/Reference
|id=hufford1998a
|text=Hufford, L. 1998. Early development of androecia in polystemonous Hydrangeaceae. Amer. J. Bot. 85: 1057–1067.
}}{{Treatment/Reference
|id=hufford2001a
|text=Hufford, L., M. L. Moody, and D. E. Soltis. 2001. A phylogenetic analysis of Hydrangeaceae based on sequences of the plastid gene matK and their combination with rbcL and morphological data. Int. J. Plant Sci. 162: 835–846.
}}{{Treatment/Reference
|id=hufford2004a
|text=Hufford, L. 2004. Hydrangeaceae. In: K. Kubitzki et al., eds. 1990+. The Families and Genera of Vascular Plants. 10+ vols. Berlin etc. Vol. 6, pp. 202–215.
}}{{Treatment/Reference
|id=small1905c
|text=Small, J. K. and P. A. Rydberg. 1905. Hydrangeaceae. In: N. L. Britton et al., eds. North American Flora.... 1905+. New York. 47+ vols. Vol. 22, pp. 159–178.
}}{{Treatment/Reference
|id=soltis1995b
|text=Soltis, D. E., Xiang Q. Y., and L. Hufford. 1995. Relationships and evolution of Hydrangeaceae based on rbcL sequence data. Amer. J. Bot. 82: 504–514.
}}{{Treatment/Reference
|id=spongberg1972a
|text=Spongberg, S. A. 1972. The genera of Saxifragaceae in the southeastern United States. J. Arnold Arbor. 53: 409–498.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Woody vines.
|[[Decumaria|Decumaria]]
|-id=key-0-1
|1
|Subshrubs, shrubs, or trees.
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Twigs with stellate and simple trichomes.
|[[Deutzia|Deutzia]]
|-id=key-0-2
|2
|Twigs glabrous or with simple or, sometimes, branched trichomes, never with stellate trichomes.
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Flowers both sterile and bisexual.
|[[Hydrangea|Hydrangea]]
|-id=key-0-3
|3
|Flowers all bisexual.
|[[#key-0-4| > 4]]
|-id=key-0-4
|4
|Stamens (11–)13–90 or 150–200.
|[[#key-0-5| > 5]]
|-id=key-0-5
|5
|Sepals 4; petals 4 (or 8+ in some horticultural forms); ovaries inferior to 1/2 inferior, 4-locular; styles 1 or 4; leaves deciduous; stamens (11–)13–90.
|[[Philadelphus|Philadelphus]]
|-id=key-0-5
|5
|Sepals 5–7; petals 5–7(–8); ovaries nearly superior, 5–7-locular; styles 1; leaves persistent; stamens 150–200.
|[[Carpenteria|Carpenteria]]
|-id=key-0-4
|4
|Stamens 8–12.
|[[#key-0-6| > 6]]
|-id=key-0-6
|6
|Stems prostrate to decumbent.
|[[Whipplea|Whipplea]]
|-id=key-0-6
|6
|Stems erect, ascending, or spreading.
|[[#key-0-7| > 7]]
|-id=key-0-7
|7
|Filament apices 2-lobed, lobes prolonged beyond anthers; seeds (1–)2–4(–6) per locule.
|[[Fendlera|Fendlera]]
|-id=key-0-7
|7
|Filament apices not 2-lobed; seeds 1 or 10–50 per locule.
|[[#key-0-8| > 8]]
|-id=key-0-8
|8
|Inflorescences 100–1000-flowered; capsule dehiscence interstylar, creating pore at base of styles.
|[[Hydrangea|Hydrangea]]
|-id=key-0-8
|8
|Inflorescences 1–35-flowered; capsule dehiscence septicidal.
|[[#key-0-9| > 9]]
|-id=key-0-9
|9
|Leaf blade margins usually crenate to dentate, rarely entire; blades ovate or broadly ovate to obovate, rhombic, or suborbiculate, venation pinnate; seeds 25–50 per locule.
|[[Jamesia|Jamesia]]
|-id=key-0-9
|9
|Leaf blade margins entire; blades elliptic to lanceolate, oblanceolate, obovate, or linear-oblong, venation acrodromous; seeds 1 per locule.
|[[Fendlerella|Fendlerella]]
|}
</div></div><!--

-->{{#Taxon:
name=Hydrangeaceae
|author=Craig C. Freeman
|authority=Dumortier
|rank=family
|parent rank=
|synonyms=
|basionyms=
|family=Hydrangeaceae
|illustrator=Yevonn Wilson-Ramsey
|illustration copyright=Flora of North America Association
|distribution=North America;Mexico;Central America;South America;Eurasia;Pacific Islands.
|reference=de2015a;hufford1995a;hufford1997a;hufford1998a;hufford2001a;hufford2004a;small1905c;soltis1995b;spongberg1972a
|publication title=
|publication year=
|special status=
|source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V12/V12_917.xml
}}<!--

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