WOOTOlSr AND STANDLEY FLORA OF NEW MEXICO. 41 



1. Zanichellia palustris L. Sp. PI. 969. 1753. 

 Type locality: "Habitat in Europae, Virginiae fossis, fluviis." 

 Range: In streams and ponds throughout North America except the extreme 



north; also in Eurasia. 

 New Mexico: Tunitcha Mountains; Manguitas Spring; Salt Lake; Cienaga Ranch; 



Fort Tularosa; Roswell. 



10. NAIADACEAE. Naias Family. 



1. NAIAS L. Naias. 



Slender branched aquatic, entirely submerged, with fibrous roots, numerous oppo- 

 site or fasciculate leaves, and monoecious or dioecious, sessile or pedicellate, axillary, 

 inconspicuous flowers; mature carpel solitary, sessile, ellipsoid, with a crustaceoua 

 pericarp. 



1. Naias guadalupensis (Spreng.) Morong, Mem. Torrey Club 3^: 60. 1893. 

 Caulinia guadalupensis Spreng. Syst. Veg. 1: 20. 1825. 

 Type locality: "Insula Guadalupa." 



Range: Floating in water, Nebraska and Oregon to Florida and Tropical America. 

 New Mexico: Lake La Jara {Standley 8274). 



Order 9. ALISMALES. 



KEY TO THE FAMILIES. 



Petals and sepals similar; anthers long and narrow; 



carpels coherent 11. JUNCAGINACEAE (p. 41). 



Petals and sepals unlike, the former white; anthers 



short and thick; carpels not coherent 12. ALISMACEAE (p. 42). 



11. JUNCAGINACEAE. Arrow grass Family. 



1. TRIGLOCHIN L. Arrow grass. 



Perennial herbs with fleshy grasslike leaves clustered at the base of the scapelike 

 stem; flowers small, spicate, with 3 ovate sepals and 3 similar petals; stamens 3 or 6; 

 ovaries 3 or 6, united, the capsule splitting at maturity into 3 or 6 carpels. 



KEY TO THE SPECIES. 



Carpels 6; plants tall, 60 to 80 cm. high, stout 1. T. maritimum. 



Carpels 3; plants low, 35 cm. high or less, slender 2. T. palu^tre. 



1. Triglochin maritimum L. Sp. PI. 339. 1753. 

 Type locality: "Habitat in Europae maritimis." 



Range: Throughout the United States and in Mexico; also in Europe and Asia. 

 New Mexico: Fitzgerald Cienaga; Mescalero Agency; Tularosa. Marshes, in the 

 Transition Zone. 



2. Triglochin palustre L. Sp. PL 338. 1753. 



Type locality: "Habitat in Europae inundatis uliginosis." 



Range: Widely distributed in North America; also in South America, Europe, and 

 Asia. 



New Mexico: Grass Mountain; Rio Pueblo; Silver Spring Canyon. Wet ground, 

 in the Transition and Canadian zones. 



