Part 1, 1905] PODOSTBMONACBAE 5 



ultimate segments less than 1 mm. long, usually obtuse ; spathe 1 cm. long or less ; pedicel, 

 when mature, 1.5-3.5 cm. long, rather slender, not at all or barely enlarged at the apex; 

 stamens 6-8, when mature about 3 mm. long and usually considerably exceeding the cap- 

 sule, the anthers about 1 mm. long; capsule, when mature, 2.25-2.5 mm. long, about 1.5 

 mm. in diameter, oval, obtuse, the nerves less prominent than in M. oxycarpum Tul.; stig- 

 mas partly united at the base, 1.2-1.5 mm. long, obtuse. 



Type locality : Not cited. 



Distribution : Nicaragua and Guatemala. 



Illustration : Vidensk. Selsk. Skr. VI. Nat. eg Mat. 11 : 42,/. 38, and 50,/. 46. 



5. Marathrum oxycarpum Tul. Ann. Sci. Nat. III. 11 : 94. 1849. 



Rhizome thick, variable. Leaves 4 dm. long or less, the petiole less than 1 dm, long, 

 fleshy, the blade 3 dm. long or less, the midrib weak, 4-5-pinnatifid, the ultimate divisions 

 filiform and usually more than 3 mm. long; pedicel, when mature, 4-9 cm. long, straw- 

 colored, rather stout, slightly if at all enlarged at the apex ; stamens 8-10 ; filaments subulate, 

 a little shorter than the capsule ; capsule 4-5 mm. long, less than 2 mm. broad, ellipsoid, 

 acute, the 8 ribs very manifest, the stigmas partly united at the base and 2.5-3 mm. long. 



Type locality : Tropical America. 



Distribution : Guatemala, Nicaragua and Panama. 



Uncertain species 



Marathrum,? ricciaeforme Liebm. Forh. Skand. Nat. Kiob. 1849 : 512. 1849. Lieb- 

 mann remarks (/. ^.) that the material upon which he based this species was secured at 

 Huitamalco, Vera Cruz, Mexico, and that, as it was without flowers or fruit, it could not 

 be accurately described ; but that for the purpose of calling attention to thi^ form, he gives 

 a description of it. Warming (Vidensk. Selsk. Skr. VI. Nat. og Mat. 11 : 49. 1901) dis- 

 poses of the species by saying that it is not a Marathru^n^ but rather a Podostemon. 



3. BLANDOWIA Willd. Ges. Naturf. Fr. Berl. Mag. 3 : 100. 1809. 



Apinagia Tul. Ann. Sci. Nat. HI. 11 ; 97. 1849. 

 Monostylis Tul. Arch. Mus. Hist. Nat. 6 : 201. 1852. 

 Neolacis Wedd. in DC. Prodr. 17 : 59. 1873. 



Aquatic submerged herbs with erect or creeping dichotomously branched leafy or leaf- 

 less stems, leaves of various form, and flowers borne singly in the forks, or singly or in fas- 

 cicles along the stem. Flowers with a, rudimentary perianth, at first concealed in a spathe 

 which is at length disrupted by the growing pedicel. Stamens 2-6, in an incomplete whorl ; 

 filaments free, flattened. Ovary 2-celled. Styles 2, free or somewhat united below. Cap- 

 sule with 2 equal prominently nerved valves. 



Type species, Blandowia striata Willd. 



1. Blandowia myriophylla (Wedd.) Nash. 



Neolacis myriophylla Wedd. in DC. Prodr. 17 : 63. 1873. 



Rhizome short. lyeaves up to 11 cm. long, the petiole 3 cm. long or less, thick, abruptly 

 dilated into a broad clasping base ; blade 8 cm. long or less, the rachis rather thick and 

 fleshy, tripinnatifid, the ultimate segments filiform and reaching 2 mm. in length ; spathe 

 8-13 mm. long, loose, dilated above and irregularly 2-5-toothed at the apex ; pedicel, when 

 mature, 1-4 cm. long, not at all or barely dilated at the apex ; stamens 2 or 3, from slightly 

 shorter than the capsule to a little exceeding it; capsule 2.5-3 mm. long, the stigmas about 

 1 mm. long, acute. 



Type locality : Rio Virillo, Costa Rica. 

 Distribution : Mexico and Costa Rica. 



4. PODOSTEMON Michx. Fl. Bor. Am. 2: 164. 1803. 



Aquatic herbs with branching stems, distichous filiform leaves with entire or dichoto- 

 mously dissected blades, and terminal or axillary solitary flowers. Flowers with a rudi- 

 mentary perianth, at first enclosed in a spathe which is finally disrupted by the growing 

 pedicel. Stamens 2, united below. Ovary 2-celled. Stigmas 2, linear. Capsule 2-celled, 



