View source for Podostemum

{{Treatment/ID
|accepted_name=Podostemum
|accepted_authority=Michaux
|publications={{Treatment/Publication
|title=Fl. Bor.-Amer.
|place=2: 164, plate 44 [as Podostemon]. 1803
|year=1803
}}
|common_names=Threadfood;riverweed;orchid-of-the-waterfall
|basionyms=
|synonyms=
|hierarchy=Podostemaceae;Podostemum
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Podostemaceae]]</div><div class="higher-taxon"><small>genus</small>[[Podostemum]]</div></div>
|etymology=Greek podos, foot, and stemon, stamen, alluding to stamens elevated on foot-stalk (andropodium)
|volume=Volume 6
|mention_page=
|treatment_page=page 70
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Roots </b>green, photosynthetic; haptera (fleshy disclike or fingerlike outgrowths) arising along flanks of roots serving as anchorage. <b>Leaves</b> with 1–2 basal sheaths; stipules extensions of boat-shaped leaf base; petiole round to elliptic; blade symmetric, ultimate divisions linear, awl-shaped, or spatulate, apex rounded, blunt, acute, or apiculate. <b>Inflorescences</b> apical or lateral, 1–12-flowered, pedicellate; spathella clavate, smooth or papillate, apex rounded or with nipple, rupturing apically into 1–6 irregular segments. <b>Pedicels</b> expanded at apex, elongating during anthesis. <b>Flowers</b> zygomorphic; tepals scalelike, 2 at base of ovary on either side of andropodium (lateral tepals), shorter than ovary, 1 (andropodial tepal) arising at top of andropodium from fork between 2 stamen filaments; anthers basifixed, quadrangular; thecae equal or inner longer than outer, apices rounded, distinct, dehiscence introrse; ovary oriented obliquely on pedicel, 2-locular, ellipsoidal; ovules 25–200; placentation axile; stigmas distinct, simple, bent toward anthers prior to spathella rupture, divergent and elongating during anthesis. <b>Capsules</b> 2-locular, persistent valve oriented obliquely on pedicel, each valve 3-ribbed, suture margins thickened, riblike. <b>Seeds</b> 0–42[–203].</span><!--

-->{{Treatment/Body
|distribution=c;e North America;Mexico;West Indies (Dominican Republic);Central America;South America.
|discussion=<p>Species 11 (1 in the flora).</p>
|tables=
|references={{Treatment/Reference
|id=philbrick1983a
|text=Philbrick, C. T. and G. E. Crow. 1983. Distribution of Podostemum ceratophyllum Michx. (Podostemaceae). Rhodora 85: 325–341.
}}{{Treatment/Reference
|id=philbrick1984a
|text=Philbrick, C. T. 1984. Aspects of floral biology, breeding system, and seed and seedling biology in Podostemum ceratophyllum Michx. (Podostemaceae). Syst. Bot. 9: 166–174.
}}{{Treatment/Reference
|id=philbrick1992a
|text=Philbrick, C. T. and G. E. Crow. 1992. Isozyme variation and population structure in Podostemum ceratophyllum Michx. (Podostemaceae): Implications for colonization of glaciated North America. Aquatic Bot. 43: 311–325.
}}{{Treatment/Reference
|id=philbrick2004a
|text=Philbrick, C. T. and A. Novelo R. 2004. Monograph of Podostemum. Syst. Bot. Monogr. 70: 1–106.
}}{{Treatment/Reference
|id=rutishauser2003a
|text=Rutishauser, R. et al. 2003. Developmental morphology of roots and shoots of Podostemum ceratophyllum (Podostemaceae–Podostemoideae). Rhodora 105: 337–353.
}}
}}<!--

--><!--

-->{{#Taxon:
name=Podostemum
|author=
|authority=Michaux
|rank=genus
|parent rank=family
|synonyms=
|basionyms=
|family=Podostemaceae
|distribution=c;e North America;Mexico;West Indies (Dominican Republic);Central America;South America.
|reference=philbrick1983a;philbrick1984a;philbrick1992a;philbrick2004a;rutishauser2003a
|publication title=Fl. Bor.-Amer.
|publication year=1803
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V6/V6_111.xml
|genus=Podostemum
}}<!--

-->[[Category:Treatment]][[Category:Podostemaceae]]