View source for Villadia

{{Treatment/ID
|accepted_name=Villadia
|accepted_authority=Rose in N. L. Britton and J. N. Rose
|publications={{Treatment/Publication
|title=in N. L. Britton and J. N. Rose, New N. Amer. Crassul.,
|place=3. 1903 ,
}}
|basionyms=
|synonyms=
|hierarchy=Crassulaceae;Villadia
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Crassulaceae]]</div><div class="higher-taxon"><small>genus</small>[[Villadia]]</div></div>
|etymology=For Manuel M. Villada, 1841–1924, Mexican scientist
|volume=Volume 8
|mention_page=page 150, 172, 226, 227, 228
|treatment_page=page 225
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Herbs </b>[subshrubs], perennial, (dying to near base [or not], new shoots forming dense rosettes often by anthesis), not viviparous, 0.5–2.5 dm, glabrous [pubescent]. <b>Stems</b> decumbent-ascending [erect], branching [or not], herbaceous [± woody]. <b>Leaves</b> persistent, basal and cauline, alternate, ± alike, gradually smaller, sessile, not connate basally; blade linear, subterete, 1–2.5 cm, fleshy, base spurred, margins entire; veins not conspicuous. <b>Inflorescences</b> terminal spikes or narrow thyrses. <b>Pedicels</b>: flowers subsessile. <b>Flowers</b> erect, 5-merous; sepals distinct, all alike; petals spreading from middle [erect], connate basally, nearly distinct, rose; calyx and corolla not circumscissile in fruit; nectaries cuneate; stamens 2 times as many as sepals; filaments adnate to corolla base; pistils erect, nearly distinct; ovary base truncate; styles 2+ times shorter than ovary. <b>Fruits</b> erect. <b>Seeds</b> obovoid, with papillose ribs. <b>x</b> = 9–17, 20–22, 33+.</span><!--

-->{{Treatment/Body
|distribution=Tex.;Mexico;Central America (Guatemala);South America (Peru).
|discussion=<p>Species ca. 25 (1 in the flora).</p><!--
--><p>The status of <i>Villadia</i> is debatable. The former sect. Altamiranoa (Rose) R. T. Clausen, which clearly intergrades with Mexican <i>Sedum</i> and differs chiefly in its connate petals, seems better placed in <i>Sedum</i> (C. H. Uhl and R. V. Moran 1999). <i>Villadia</i> proper is weakly distinguished from the huge and multifarious genus <i>Sedum</i>, now treated by H. ’t Hart (1995) as paraphyletic, but it seems a taxonomic convenience to remove such peripheral groups as this (Moran 1990). Uhl (1963, 1992) has found that Altamiranoa and <i>Villadia</i> belong to the same huge comparium as <i>Echeveria</i>, <i>Graptopetalum</i>, <i>Lenophyllum</i>, and others. <i>Villadia</i> is like <i>Echeveria</i> in having a remarkably long, descending series of evidently diploid chromosome numbers, namely 21, 20, and 17 to 9, as well as a few higher, polyploid numbers (Uhl and Moran). R. C. H. J. van Ham and ’t Hart (1998) found that <i>Villadia</i> is closely related to least advanced Eurasian <i>Sedum</i> and the Mexican genera <i>Echeveria</i> and Pachyphytum.</p><!--
--><p><i>Villadia</i> misera (Lindley) R. T. Clausen is reported from Arizona under the synonym V. parviflora (Hemsley) Rose; R. T. Clausen (1940), without comment, cited a collection by W. B. Cannon and F. E. Lloyd (NY [also US]), supposedly from the San Francisco Mountains. There is no other record for Arizona, and the nearest undoubted locality is in Zacatecas, some 1500 km to the southeast. These are cultivated specimens, and the label locality evidently is wrong.</p>
|tables=
|references={{Treatment/Reference
|id=clausen1940a
|text=Clausen, R. T. 1940. Studies in the Crassulaceae: Villadia, Altamiranoa, and Thompsonella. Bull. Torrey Bot. Club 67: 195–198.
}}{{Treatment/Reference
|id=uhl1999a
|text=Uhl, C. H. and R. V. Moran. 1999. Chromosomes of Villadia and Altamiranoa (Crassulaceae). Amer. J. Bot. 86: 387–397.
}}
}}<!--

--><!--

-->{{#Taxon:
name=Villadia
|author=Reid V. Moran
|authority=Rose in N. L. Britton and J. N. Rose
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Crassulaceae
|distribution=Tex.;Mexico;Central America (Guatemala);South America (Peru).
|reference=clausen1940a;uhl1999a
|publication title=in N. L. Britton and J. N. Rose, New N. Amer. Crassul.,
|publication year=
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V8/V8_471.xml
|genus=Villadia
}}<!--

-->[[Category:Treatment]][[Category:Crassulaceae]]