View source for Hydrangea ← Hydrangea You do not have permission to edit this page, for the following reason: The action you have requested is limited to users in the group: Users. You can view and copy the source of this page. {{Treatment/ID |accepted_name=Hydrangea |accepted_authority=Linnaeus |publications={{Treatment/Publication |title=Sp. Pl. |place=1: 397. 1753 |year=1753 }} |common_names=Graybeard;sevenbark;hortensia |basionyms= |synonyms= |hierarchy=Hydrangeaceae;Hydrangea |hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Hydrangeaceae]]</div><div class="higher-taxon"><small>genus</small>[[Hydrangea]]</div></div> |etymology=Greek hydor, water, and angeion, diminutive of angos, vessel or container, alluding to shape of mature, dehisced capsule |volume=Volume 12 |mention_page=page 462, 463, 489 |treatment_page=page 486 }}<!-- --><span class="statement" id="st-d0_s0" data-properties="whole_organism growth form;whole_organism growth form"><b>Shrubs </b>or trees.</span> <span class="statement" id="st-d0_s1" data-properties="stem orientation;stem orientation;stem orientation;stem orientation;stem orientation"><b>Stems </b>erect, ascending, or spreading.</span> <span class="statement" id="st-d0_s2" data-properties="bark relief;sheet coloration;sheet coloration;sheet coloration"><b>Bark </b>exfoliating in grayish, brown, or reddish-brown sheets.</span> <span class="statement" id="st-d0_s3" data-properties="branch orientation;branch orientation;branch orientation;branch orientation;branch orientation;branch orientation"><b>Branches </b>erect, ascending, or spreading, sometimes arching;</span> <span class="statement" id="st-d0_s4" data-properties="trichome architecture;trichome architecture">twigs with simple or branched trichomes.</span> <span class="statement" id="st-d0_s5" data-properties="leaf duration;leaf arrangement;leaf arrangement"><b>Leaves </b>deciduous, opposite or 3-whorled;</span> <span class="statement" id="st-d0_s6" data-properties="petiole presence">petiole present;</span> <span class="statement" id="st-d0_s7" data-properties="blade shape;blade shape;blade shape;blade shape;blade shape;blade shape;blade shape;blade growth form or texture">blade ovate, elliptic-ovate, elliptic, or suborbiculate, sometimes lobed, herbaceous, margins serrate to serrulate, plane;</span> <span class="statement" id="st-d0_s8" data-properties="margin shape or architecture;margin shape;margin architecture or shape">venation pinnate.</span> <span class="statement" id="st-d0_s9" data-properties="inflorescence position or structure subtype;cymose-panicle architecture"><b>Inflorescences </b>terminal, cymose-panicles, 100–1000-flowered;</span> <span class="statement" id="st-d0_s10" data-properties="peduncle presence">peduncle present.</span> <span class="statement" id="st-d0_s11" data-properties="pedicel presence"><b>Pedicels </b>present.</span> <span class="statement" id="st-d0_s12" data-properties="flower reproduction;flower position;flower reproduction"><b>Flowers </b>bisexual or marginal ones often sterile (these with a petaloid, salverform calyx);</span> <span class="statement" id="st-d0_s13" data-properties="perianth position;perianth position;androecium position;androecium position">perianth and androecium epigynous or perigynous;</span> <span class="statement" id="st-d0_s14" data-properties="hypanthium shape;hypanthium shape;hypanthium fusion;hypanthium architecture or shape">hypanthium campanulate or hemispheric, completely adnate to ovary, weakly or strongly 7–10 (–11) -ribbed in fruit;</span> <span class="statement" id="st-d0_s15" data-properties="sepal duration;sepal quantity;sepal orientation;sepal orientation;sepal shape;sepal pubescence;sepal pubescence">sepals persistent, 5, spreading or reflexed, deltate to shallowly triangular, usually glabrous, rarely abaxially sparsely hairy;</span> <span class="statement" id="st-d0_s16" data-properties="petal quantity;petal arrangement or dehiscence;petal orientation;petal orientation;petal coloration;petal shape;petal shape;petal shape;petal shape;petal shape;base architecture;surface pubescence">petals 5, valvate, spreading or reflexed, white to yellowish white, ovatelanceolate, elliptic, oblong, spatulate, or narrowly ovate to ovate, base sessile, surfaces glabrous;</span> <span class="statement" id="st-d0_s17" data-properties="stamen quantity">stamens 10;</span> <span class="statement" id="st-d0_s18" data-properties="all fusion;all shape;all shape;all shape;all shape;all shape;apex shape">filaments distinct, terete or flattened proximally, gradually or abruptly tapered from base to apex, apex not 2-lobed;</span> <span class="statement" id="st-d0_s19" data-properties="anther shape;anther shape">anthers depressed-ovoid or transversely oblong;</span> <span class="statement" id="st-d0_s20" data-properties="pistil architecture">pistil 2–4-carpellate, ovary completely inferior or nearly so, or 1/2 inferior, 2–4-locular;</span> <span class="statement" id="st-d0_s21" data-properties="ovary position;ovary position;ovary quantity;ovary position;ovary architecture or structure in adjective form;ovary placentation;ovary arrangement">placentation axile proximally, parietal distally;</span> <span class="statement" id="st-d0_s22" data-properties="style duration;style quantity;style fusion;style fusion">styles persistent, 2–4, distinct or connate to middle or distally.</span> <span class="statement" id="st-d0_s23" data-properties="capsule shape;capsule shape;capsule shape;capsule shape;capsule shape;capsule texture;capsule dehiscence;pore arrangement or shape"><b>Capsules </b>hemispheric, suburceolate, or oblong-ovoid, coriaceous, dehiscence interstylar, creating elliptic to circular pore at base of styles.</span> <span class="statement" id="st-d0_s24" data-properties=""><b>Seeds </b>10–40 per locule, light-brown to dark-brown, fusiform or ellipsoid.</span> <span class="statement" id="st-d0_s25" data-properties="seed quantity;seed coloration;seed shape;seed shape;x chromosome quantity">x = 18.</span><!-- -->{{Treatment/Body |distribution=United States;Mexico;Central America;w South America;e Asia |discussion=<p>Species ca. 29 (5 in the flora).</p><!-- --><p>Hydrangea enjoys considerable esteem as an ornamental shrub, especially for its prominent sterile flowers. North American species have been cultivated in Europe since before the mid 1700s (W. L. Stern 1978). Besides the species treated here, popular ornamentals in North America are H. anomala D. Don, H. aspera D. Don, H. heteromalla D. Don, H. involucrata Siebold, H. macrophylla (Thunberg) Seringe, and H. serrata (Thunberg) Seringe. Among these, H. macrophylla may be the most widely grown; M. A. Dirr (2004) listed nearly 170 cultivars of this species. Surprisingly, it has not escaped from cultivation.</p><!-- --><p>Tubercles, comprising crystals of calcium carbonate, often are visible on leaf trichomes (G. W. Burkett 1932). They are observed most easily at magnifications greater than 30\x, and some taxonomic utility has been ascribed to their presence and abundance.</p><!-- --><p>Toxic and medicinal properties are attributed to some native and cultivated species of Hydrangea (J. M. Kingsbury 1964; W. L. Stern 1978; D. E. Moerman 1998; G. E. Burrows and R. J. Tyrl 2001). These possibly are related to various alkaloids present in roots and leaves of some species.</p><!-- --><p>Y. De Smet et al. (2015) found Hydrangea to be polyphyletic and promoted adoption of a broader, monophyletic concept of Hydrangea that includes all eight genera in tribe Hydrangeeae. Both North American genera in the tribe, Decumaria and Hydrangea, are circumscribed here in their traditional senses.</p> |tables= |references={{Treatment/Reference |id=dirr2004a |text=Dirr, M. A. 2004. Hydrangeas for American Gardens. Portland. }}{{Treatment/Reference |id=mcclintock1957a |text=McClintock, E. 1957. A monograph of the genus Hydrangea. Proc. Calif. Acad. Sci., ser. 4, 29: 147–256. }}{{Treatment/Reference |id=pilatowski1980a |text=Pilatowski, R. E. 1980. A Taxonomic Study of the Hydrangea arborescens Complex. M.S. thesis. North Carolina State University. }}{{Treatment/Reference |id=pilatowski1982a |text=Pilatowski, R. E. 1982. A taxonomic study of the Hydrangea arborescens complex. Castanea 47: 84–98. }}{{Treatment/Reference |id=st1921a |text=St. John, H. 1921. A critical revision of Hydrangea arborescens. Rhodora 23: 203–208. }}{{Treatment/Reference |id=stern1978a |text=Stern, W. L. 1978. Comparative anatomy and systematics of woody Saxifragaceae. Hydrangea. Bot. J. Linn. Soc. 76: 83–113. }} }}<!-- --><div class="treatment-key"> ==Key== <div class="treatment-key-group"> {| class="wikitable fna-keytable" |-id=key-0-1 |1 |Leaf blades (3–)5(–7)-lobed, margins coarsely serrate; inflorescences ovoid to conic. |[[Hydrangea quercifolia|Hydrangea quercifolia]] |-id=key-0-1 |1 |Leaf blades unlobed, margins dentate, serrate, or serrulate; inflorescences dome-shaped to hemispheric or conic to ovoid. |[[#key-0-2| > 2]] |-id=key-0-2 |2 |Ovaries 1/2 inferior; inflorescences usually conic, sometimes ovoid. |[[Hydrangea paniculata|Hydrangea paniculata]] |-id=key-0-2 |2 |Ovaries completely inferior or nearly so; inflorescences dome-shaped to hemispheric. |[[#key-0-3| > 3]] |-id=key-0-3 |3 |Leaf blade abaxial surfaces white or grayish, densely tomentose, trichomes at 40× either smooth, 1–3 mm, or sparsely tuberculate, 0.3–1 mm. |[[Hydrangea radiata|Hydrangea radiata]] |-id=key-0-3 |3 |Leaf blade abaxial surfaces green, glabrous or glabrate, or grayish, uniformly velutinous, pilose, or tomentose, trichomes at 40× conspicuously tuberculate, 0.3–1 mm. |[[#key-0-4| > 4]] |-id=key-0-4 |4 |Leaf blade abaxial surfaces green, glabrous or glabrate, or sparsely hirsute along midveins and sometimes along lateral veins. |[[Hydrangea arborescens|Hydrangea arborescens]] |-id=key-0-4 |4 |Leaf blade abaxial surfaces grayish, uniformly velutinous, pilose, or tomentose. |[[Hydrangea cinerea|Hydrangea cinerea]] |} </div></div><!-- -->{{#Taxon: name=Hydrangea |author=Craig C. Freeman |authority=Linnaeus |rank=genus |parent rank=family |synonyms= |basionyms= |family=Hydrangeaceae |distribution=United States;Mexico;Central America;w South America;e Asia |reference=dirr2004a;mcclintock1957a;pilatowski1980a;pilatowski1982a;st1921a;stern1978a |publication title=Sp. Pl. |publication year=1753 |special status= |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V12/V12_115.xml |genus=Hydrangea |all fusion=distinct |all shape=tapered;or;,;flattened;terete |androecium position=perigynous;epigynous |anther shape=oblong;depressed-ovoid |apex shape=not 2-lobed |bark relief=exfoliating |base architecture=sessile |blade growth form or texture=herbaceous |blade shape=lobed;suborbiculate;elliptic;suborbiculate;elliptic;elliptic-ovate;ovate |branch orientation=arching;spreading;ascending;spreading;ascending;erect |capsule dehiscence=interstylar |capsule shape=oblong-ovoid;suburceolate;oblong-ovoid;suburceolate;hemispheric |capsule texture=coriaceous |cymose-panicle architecture=100-1000-flowered |flower position=marginal |flower reproduction=sterile;bisexual |hypanthium architecture or shape=7-10(-11)-ribbed |hypanthium fusion=adnate |hypanthium shape=hemispheric;campanulate |inflorescence position or structure subtype=terminal |leaf arrangement=3-whorled;opposite |leaf duration=deciduous |margin architecture or shape=pinnate |margin shape=plane |margin shape or architecture=serrate to serrulate |ovary architecture or structure in adjective form=2-4-locular |ovary arrangement=parietal |ovary placentation=axile |ovary position=inferior;nearly;inferior |ovary quantity=1/2 |pedicel presence=absent |peduncle presence=absent |perianth position=perigynous;epigynous |petal arrangement or dehiscence=valvate |petal coloration=white;yellowish white |petal orientation=reflexed;spreading |petal quantity=5 |petal shape=narrowly ovate;ovate |petiole presence=absent |pistil architecture=2-4-carpellate |pore arrangement or shape=elliptic;circular |seed coloration=light-brown;dark-brown |seed quantity=10;40 |seed shape=ellipsoid;fusiform |sepal duration=persistent |sepal orientation=reflexed;spreading |sepal pubescence=hairy;glabrous |sepal quantity=5 |sepal shape=deltate;shallowly triangular |sheet coloration=reddish-brown;brown;grayish |stamen quantity=10 |stem orientation=spreading;ascending;spreading;ascending;erect |style duration=persistent |style fusion=connate;distinct |style quantity=2;4 |surface pubescence=glabrous |trichome architecture=branched;simple |whole_organism growth form=tree;shrub |x chromosome quantity=18 }}<!-- -->[[Category:Treatment]][[Category:Hydrangeaceae]] Templates used on this page: Template:Hydrangeaceae (view source) Template:Treatment/AuthorLink (view source) Template:Treatment/Body (view source) Template:Treatment/Body/Maps (view source) Template:Treatment/ID (view source) Template:Treatment/Publication (view source) Template:Treatment/Reference (view source) Return to Hydrangea.