644 PROCEEDINGS OF THE NATIONAL MUSEUM voi..xxni. 



Woodsia obtusa plummerae (Lemmon) ]Maxon, comb, no v. 



WvOLhiapJiunincrae Lemmon, Bot. Gaz. 7 : 6. 1882. 



Woodsia obtusa var. glandulosa D. C. Eaton & Faxon, Bull. Torr. Club 9 : 50. 

 1882. 

 New Mexico and Arizona. 



Woodsia mexicana Fee, T'"*" Mem. Fam. Foug. 6(i. 1854. 



Texas, ^ew Mexico, and Arizona. 



DENNSTAEDTIA Bernh. Sehrad. Joiirn. Bot. 1800"; 124. 1801. 



Dennstaedtia punctilobula (Michx.) Moore, Index Fil. xcvii. 1857. 

 Xcphrodiaiii jnuictllobiihon yik-hx. Fl. Bor. Am. 2 : 268. 1803. 

 Dicksonia pundiloha Hoo^. >Sp. Fil. 1 : 79. 1846. 

 Dicksoniapilosiuscida'WiWd. Enum. PI. Hort. Berol. 1076. 1809. 

 Nova Scotia and New Brunswick to Ontario an<l ^Minnesota, south to Georgia 

 and Alabama. 



Family VII. MARSILEACEAE R. Br. Prodr. Fl. Nov. Holl. 1 : 166. 



1810. 



MAESILEA L. Sp. PI. 1000. 1753. 



Marsilea quadrifolia L. Sp. PL 1000. 1753. 



Ai^parently indigenous at Bantam Lake, Litchfield County, Connecticut (Allen) y 

 though possibly adventive from Europe. Extensively introduced. 



Marsilea macropoda Engelm. Am. Jouni. Sci. 11. 3 ; 56. 1847. 

 Texas and New 3Iexico. 



Marsilea uncinata A. Br. Flora 22 : 300. 1839. 

 Louisiana; Dallas, Texas {Reverchoii). 



Marsilea vestita Hook. & Grev. Icon. Fil. 2 : j^I. 159. 1831. 



Marsilen, mucronata A. Br. Am. Journ. Sci. II. 3: 55. textf. 2. 1847. 

 Arkansas and Texas to California, north to Washington, British Columbia, ^Nlon- 

 tana, and South Dakota. Also in Florida. 



Marsilea tenuifolia Engelm.; Kunze. Am. Journ. Sci. II. 6: 89. 1848. 

 Pierdenales, Texas (Luidhehner); western Texas {Wright). 



PILTJLARIA L. Sp. PI. 1100. 1753. 

 Pilularia americana A. Br. Monatsb. Kon. Akad. Wiss. Berlin 1863 : 435. 



1863. PlLLWOKT. 

 Several localities in California. Also in Arkansas {Xuttall) and Oregon {Leiberg). 



Family VIII. SALVINIACEAE Reichenb. Consp. 30. 1828. 



SALVINIA Adans. Fam. PI. 2: 15. 1763. 



Salvinia natans (L.) Hoffm. Deutsch. Fl. 2: 1. 1795. SALyiNiA. 

 Mamhv. nutans L. Sp. PI. 1099. 1753. 

 Bois Brule Bottoms, Perry County, Missouri [Bcmetrio); central New York 



{Pursli) . 



