Duke Bryology Laboratory - Pohlia robertsonii and P. rabunbaldensis in USA <meta name=Title content="Duke Bryology Laboratory - taxonomy projects - Pohlia"> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <meta name=description content="The website of A.J. Shaw lab at Duke University, NC, USA"> <meta name=Keywords content="Shaw Bryology Duke University taxonomy Pohlia">  <link rel="stylesheet" href="img/stylesheet.css"></head> <body bgcolor="#FFFFFF" BODY TOPMARGIN=0 LEFTMARGIN=0 MARGINHEIGHT=0 MARGINWIDTH=0 link="#333333" vlink="#333333" alink="#660000"> <table width="900" border="0" cellspacing="0" cellpadding="12"> <tr height="35" bgcolor="#C8C8C8" > <td class="menu2" height="32"><a name="top"></a>Duke Bryology Lab</td><td class="menu" height="32"> <div align="right"><a href="index.html" target="_self" style="text-decoration:none"> Home</a> <a href="facilities.html" target="_self" style="text-decoration:none">Facilities</a> <a href="people.html" target="_self" style="text-decoration:none">People</a> <a href="projects.html" target="_self" style="text-decoration:none">Projects</a> <a href="protocols.html" target="_self" style="text-decoration:none">Protocols</a> <a href="links.html" target="_self" style="text-decoration:none">Links</a></div></td></tr> </table><table width="900" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="140" width="145" align="left" valign="top"><img src="img/mr18.jpg" width="145" height="148" alt="Pohlia robertsonii"></td><td rowspan="2" align="left" valign="top" width="10" > </td><td align="left" valign="top" height="10" rowspan="2" > <p align="right"> </p> <h3><i><b>Pohlia robertsonii</b></i><b> and <i>P. rabunbaldensis</i> (Mniaceae), two new species from the western and eastern United States</b></h3><p><i>Pohlia robertsonii </i>is newly described from central California. Plants with abundant polysetous sporophytes immediately separate this species from all other members of the genus Pohlia in North America. <i>Pohlia robertsonii</i> is further characterized by firm but not thickened leaf cells, paroicous inflorescences, long, narrowly cylindrical capsules, and irregular peristomes in which the endostome segments equal or exceed the exostome teeth, and lack cilia. The peristomial formula is 4:2:2-4. </p><p><i>Pohlia rabunbaldensis</i> is described from the southern Appalachian Mountains of Georgia and North Carolina. The slender gametophytes bear single bud-like gemmae in upper leaf axils. The dull leaves that are somewhat shriveled on drying resemble those of <i>P. annotina</i> but the large single gemmae with flexuose, broadly laminate leaf primordia resemble those of <i>P. drummondii</i>. The conspicuously decurrent leaves distinguish <i>P. rabunbaldensis</i> from both previously known species.</p><p><b><a href="img/pohliarab1.jpg" target="_self"><img src="img/pohliarab1a.jpg" width="150" height="215" align="right" vspace="5" hspace="5" border="1" color="#666666" alt="Pohlia robertsonii thumbnail"></a>Pohlia robertsonii: </b><br> TYPE: U.S.A. California. Monterey Co., Wagon Caves just north of boundary with Fort Hunter-Liggett Military Reservation off of Forest Road to The Indians, Los Padres National Forest, 36°05'00" N, 121°24'05" W, 22 Mar 2004, 295 m, Shevock et al. 24722 (holotype CAS; isotypes: DUKE, H, KRAM, MO, NY, UC). <br> Paratypes: U.S.A. California. Monterey Co.: Wagon Caves, Shevock & Kellman 24787 (CAS, DUKE, UBC, UNAM), Robertson 6134, 6331 (UC), and Norris & Hillyard 106947 (UC); on divide about 0.5 mile south of Santa Lucia Park, Los Padres National Forest, Shevock et al. 24771 (CAS, MO, NY); off of Gabilan Road at the Palisades above the Nacimiento River, Hunter-Liggett Military Reservation, Shevock et al. 24858 (CAS, DUKE, MO, NY) and Shevock et al. 24863 (CAS). </p><p><b>Fig. 1</b>. <i>Pohlia robertsonii</i>. - <b>a.</b> Capsules. - <b>b.</b> Mature gametophytes. - <b>c.</b> Maternal plant bearing three setae. - <b>d.</b> Peristome, viewed from the outside. - <b>e.</b> Peristome, viewed from the inside. Cell outlines demonstrate the 4:2:4 peristomial formula (one column of cells between segments). -<b> f.</b> Stomate. Note that the guard cells overlap surrounding exothecial cells. - <b>g.</b> Annular cells. - <b>h. </b>Exothecial cells. -<b> i. </b>Vegetative leaves. - <b>j.</b> Perichaetial leaf, with recurved margins. -<b>k.</b> - Leaf apex. - <b>i. </b>Upper median leaf cells. <br> Scale bars: a-c: 1.0 mm; i-j: 0.5 mm; others as marked.</p><p><b><a href="img/pohliarab2.jpg" target="_self"><img src="img/pohliarab2a.jpg" width="150" height="219" align="right" vspace="5" hspace="5" border="1" color="#666666" alt="Pohlia rabunbaldensis thumbnail"></a>Pohlia rabunbaldensis:</b> <br> TYPE: U.S.A. Georgia. Rabun Co., Chattahoochee National Forest, mixed hardwood forest and gneissic rock faces on north-facing slopes of the bald, 3700-4700 ft. elevation. 34o58'N, 83o18'W, Shaw 8474. (holotype: DUKE; isotype: NY). <br> Paratypes: U.S.A. Georgia. Rabun Co., Chattahoochee National Forest, Mixed hardwood forest and gneissic rock faces on north-facing slopes of the bald, 3700-4700 ft. elevation. 34o58'N, 83o18'W, Shaw 8390, 8473, 8478 (DUKE); Rabun Co., Rabun Bald Cliffs, Zartman 2558 (DUKE). North Carolina. Buncombe Co., Pisgah National Forest, along the Blue Ridge Parkway at Snowball Mtn., mixed hardwood forest with scattered Picea rubra, ca. 1500 m elevation. 35o42'N, 82o24'W, Shaw 13614, 13615 (DUKE). </p><p><b>Fig. 2</b>. Pohlia rabunbaldensis. - <b>a.</b> Gemmae. - <b>b.</b> Vegetative leaves. - <b>c-d.</b> Gemmiferous plants. Scale bars: a-b: 0.5 mm; c-d:1.0 mm.</p><h1>Reference:</h1><p><span class="ref">Shevock, J. R. & A. J. Shaw. 2005. <i><b>Pohlia robertsonii</b></i><b> and <i>P. rabunbaldensis</i> (Bryopsida, Mniaceae), two new species from the western and eastern United States</b>. <i>Bryologist </i>108: 177-182. <A HREF="reprints/Bryologist2005_Pohlia.pdf">reprint</A></span></p><p> </p></td></tr> <tr> <td width="145" valign="top" bgcolor="#FFFFCC"> <p><span class="note"> <br> Shaw Laboratory<BR></span><span class="note"> 139 Biological Sciences Bldg. <br> Box 90338 <br> Department of Biology <br> Duke University <br> Durham<br> North Carolina 27708 <br> U.S.A.</span></p><p align="left"><span class="note"> Phone: (+1) 919 660-7345<br> Fax: (+1) 919 660-7293</span><span class="note"><BR> </span></p></td></tr> </table><table width="900" border="0" cellspacing="0" cellpadding="2"> <tr> <td> </td></tr> </table> </body> </html>