Difference between revisions of "Pachysandra"
Fl. Bor.-Amer. 2: 177, plate 45. 1803.
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|hierarchy=Buxaceae;Pachysandra | |hierarchy=Buxaceae;Pachysandra | ||
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Buxaceae]]</div><div class="higher-taxon"><small>genus</small>[[Pachysandra]]</div></div> | |hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Buxaceae]]</div><div class="higher-taxon"><small>genus</small>[[Pachysandra]]</div></div> | ||
| − | |etymology=Greek <i>pachys<i | + | |etymology=Greek <i>pachys</i>, stout, and <i>pachys</i>, man, alluding to thickness of staminal filaments |
|volume=Volume 10 | |volume=Volume 10 | ||
|mention_page= | |mention_page= | ||
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|distribution=e;s North America;e Asia. | |distribution=e;s North America;e Asia. | ||
|discussion=<p>Species 3 (2 in the flora).</p><!-- | |discussion=<p>Species 3 (2 in the flora).</p><!-- | ||
| − | --><p>The third species in the genus, <i> | + | --><p>The third species in the genus, <i>Pachysandra axillaris</i> Franchet, with two subspecies, <i>axillaris</i> and <i>stylosa</i> Boufford & Q. Y. Xiang, is intermediate between <i>P. procumbens</i> and <i>P. terminalis</i> in having axillary inflorescences. Similar to <i>procumbens</i>, <i>axillaris</i> has a 3-carpellate gynoecium; according to H. C. Robbins (1968), <i>procumbens</i> rarely has axillary inflorescences.</p> |
|tables= | |tables= | ||
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|publication year=1803 | |publication year=1803 | ||
|special status= | |special status= | ||
| − | |source xml=https://xjsachs2@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://xjsachs2@bitbucket.org/aafc-mbb/fna-data-curation.git/src/e39f0e846f172941159b2045254d62d10d9823f6/coarse_grained_fna_xml/V10/V10_7.xml |
|genus=Pachysandra | |genus=Pachysandra | ||
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-->[[Category:Treatment]][[Category:Buxaceae]] | -->[[Category:Treatment]][[Category:Buxaceae]] | ||
Latest revision as of 10:33, 9 May 2022
Herbs or subshrubs, clonal; rhizomes branched, creeping, long. Leaves alternate, often crowded or fasciculate; blades margins dentate, surfaces dull or slightly shiny. Inflorescences from leafless nodes near base of stem or terminal [axillary], rarely from rhizomes, dense spikes [racemes]. Staminate flowers distal and, sometimes, 1 or 2 proximally; tepals 2 or 4; stamens exserted; pistillode absent. Pistillate flowers 1–7 per inflorescence, proximal, subtended by 7 or more scalelike bracts; tepals usually 4, sometimes more, white; ovary 2- or 3(or 4)-carpellate, apically 2 or 3-lobed; locules 1(or 2) per carpel; stigma linear, apical along inner surface of style; interstylar nectaries or nectariferous tissue absent; ovules 1 or 2 per locule. Fruits capsules or berries, ovoid to subglobose, dehiscence basal, circumscissile, glabrous or densely hairy. Seeds 1 per locule, brown or black, ovoid, 3-sided, smooth; carunculate or ecarunculate. x = 12.
Distribution
e, s North America, e Asia.
Discussion
Species 3 (2 in the flora).
The third species in the genus, Pachysandra axillaris Franchet, with two subspecies, axillaris and stylosa Boufford & Q. Y. Xiang, is intermediate between P. procumbens and P. terminalis in having axillary inflorescences. Similar to procumbens, axillaris has a 3-carpellate gynoecium; according to H. C. Robbins (1968), procumbens rarely has axillary inflorescences.
Selected References
None.
Lower Taxa
Key
| 1 | Inflorescences from leafless nodes near base of stem or rarely from rhizome; ovaries (2 or)3(or 4)-carpellate; fruits capsules. | Pachysandra procumbens |
| 1 | Inflorescences terminal on aerial shoots; ovaries 2(or 3)-carpellate; fruits berries. | Pachysandra terminalis |