View source for Leucophyllum

{{Treatment/ID
|accepted_name=Leucophyllum
|accepted_authority=Humboldt & Bonpland
|publications={{Treatment/Publication
|title=Pl. Aequinoct.
|place=2: 95, plate 109. 1812
|year=1812
}}
|common_names=Barometer-bush;silver-leaf;cenizo
|basionyms=
|synonyms=
|hierarchy=Scrophulariaceae;Leucophyllum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Scrophulariaceae]]</div><div class="higher-taxon"><small>genus</small>[[Leucophyllum]]</div></div>
|etymology=Greek leukos, white, and phyllon, leaf
|volume=Volume 17
|mention_page=page 325, 333, 334
|treatment_page=page 332
}}<!--

--><span class="statement" id="st-undefined" data-properties="">Shrubs; stolons absent. <b>Stems</b> erect, well branched, densely silvery gray-tomentose, hairs conic to cylindric, dendritic, sometimes appressed-stellate, glabrescent, [glabrous and sessile-glandular]. <b>Leaves</b> persistent, cauline, alternate to opposite or subopposite; stipules absent; petiole usually present; blade plane or ± conduplicate, not fleshy, not leathery, margins entire. <b>Inflorescences</b> axillary, flowers solitary; bracts absent. <b>Pedicels</b> present; bracteoles absent. <b>Flowers</b> bisexual; sepals 5, calyx radially symmetric, campanulate, lobes linear to oblong-lanceolate or oblong; petals 5, corolla purplish lavender to violet or blue, rarely white, with white in proximal throat, usually marked with yellow-brown, orange, or purple-violet spots, slightly bilaterally symmetric, funnelform-campanulate, abaxial lobes 3, adaxial 2, adaxial lip with lobes slightly smaller than abaxial; stamens 4, adnate to proximal 1/4–1/3 of corolla tube, didynamous, filaments glabrous or pilose near base, staminode 0; ovary 2-locular, placentation axile; stigma 2-lobed. <b>Fruits</b> capsules, oblong-ovoid, dehiscence initially septicidal to near base, eventually loculicidal halfway to base. <b>Seeds</b> 15–25, yellowish brown, irregularly ovoid, minutely reticulate, wings absent. <b>x</b> = 17.</span><!--

-->{{Treatment/Body
|distribution=sc United States;Mexico.
|discussion=<p>Species 15 (3 in the flora).</p><!--
--><p><i>Leucophyllum</i> is closely related to Eremogeton Standley & L. O. Williams of southern Mexico and Central America and <i>Capraria</i> of tropical southern Florida, Mexico, the West Indies, and Central and South America. Studies by E. Gándara and V. Sosa (2013) show both <i>Capraria</i> and Eremogeton imbedded within <i>Leucophyllum</i> in chloroplast and chloroplast-dominated phylogenies, but not in their nuclear (ITS) phylogeny (pers. comm.), leaving the relationship of these taxa unresolved.</p><!--
--><p>The relationship of <i>Leucophyllum</i> with Myoporaceae often has been suggested (L. D. Flyr 1970b; C. J. Niezgoda and A. S. Tomb 1975; E. E. Karrfalt and Tomb 1983). Molecular studies recognize Myoporeae and Leucophylleae as sister tribes within the redrawn Scrophulariaceae (R. G. Olmstead et al. 2001; B. Oxelman et al. 2005).</p><!--
--><p><i>Leucophyllum</i> zygophyllum I. M. Johnston is mapped in Hidalgo County, Texas (B. L. Turner et al. 2003); the voucher, deposited at TEX, was most likely collected in Mexico.</p>
|tables=
|references=
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Leaves: abaxial surfaces silvery gray, adaxial more greenish; plants 5–20(–30) dm; sc to trans-Pecos Texas.
|[[Leucophyllum frutescens|Leucophyllum frutescens]]
|-id=key-0-1
|1
|Leaf surfaces equally silvery gray; plants 2–10(–15) dm; trans-Pecos Texas.
|[[#key-0-2| > 2]]
|-id=key-0-2
|2
|Young stems and leaves densely and evenly silvery, hairs stellate, closely and tightly appressed, densely overlapping; plants often appearing thorny.
|[[Leucophyllum minus|Leucophyllum minus]]
|-id=key-0-2
|2
|Young stems and leaves irregularly canescent-tomentose, hairs conic to cylindric, dendritic, uneven in height; plants not appearing thorny.
|[[Leucophyllum candidum|Leucophyllum candidum]]
|}
</div></div><!--

-->{{#Taxon:
name=Leucophyllum
|author=James Henrickson; Guy L. Nesom
|authority=Humboldt & Bonpland
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Scrophulariaceae
|distribution=sc United States;Mexico.
|reference=None
|publication title=Pl. Aequinoct.
|publication year=1812
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V17/V17_20.xml
|genus=Leucophyllum
}}<!--

-->[[Category:Treatment]][[Category:Scrophulariaceae]]