SAGITTARIA AND LOPHOTOCARPUS. 59 
plump, 1.5 to 2 mm. long, with a very slender lateral 
erect beak, margins broadly winged below the middle, sides 
smooth; seed 1 mm. long, broadly obovate, striate. — 
Ponds near Guerrero, Chihuahua, Mexico, Pringle, 1367, 
Sept. 9, 1887. Distributed as S. graminea forma acuti- 
folia. It is related to S. subulata and S. filiformis.— 
Plate 15. 
§ § § Integrifoliae. 
* Fertile pedicels neither thickened nor recurved in fruit. 
S. LANCIFOLIA ANGUSTIFOLIA (Lindl.) Griseb. Catal. Pl. 
Cub. 218 (1866); Micheli, DC. Monogr. 3: 73. WS. 
angustifolia Lindley, Bot. Reg. 14: pl. 1141 (1828). 
Much smaller than the type in every part; blade of leaf 
very narrow or absent; bracts barely 3 mm. long; sepals 3 
to 4 mm.; carpels crested,— ex Micheli, 7. c. 73.— Tical- 
tepec, Mex., Liebmann, July, 1841, fide Buchenau, Engler’s 
Bot. Jahrb. 2: 487. 
* * Fertile pedicels thickened or recurved in fruit. 
S. Mexicana Steudel, Nomenclator, 491 (1841). S. 
macrophylla Zucc. Abhandl. Bayr. Akad. 1832, 289 ; 
Micheli, Monogr. 3: 71.—not Bunge, Mem. Say. 
Etrang., 2: 137 (1831).— See above, p. 30. 
Monoecious, 3 to 10 dm. high; erect, or the petioles 
weak and ascending; leaf 10 to 20 cm. long, 1 to 5 cm. 
wide, lanceolate, acute at the apex, entire, abruptly nar- 
rowing to the petiole, or hastate with small, nearly linear, 
divaricate lobes; veins free to the base; scape simple, erect, 
about equaling the leaves; verticils 3 to 5, remote ; fertile 
pedicels erect-spreading in flower, 5 to 7 cm. long, exceed- 
ing the sterile; bracts broadly ovate, obtuse, 8 to 10 mm. 
long, connate nearly to the apex; flowers ample, 3 cm. 
across; stamens 21 to 30, 4 to 5 mm. long, the slender 
glabrous filaments longer than the oblong sagittate anthers. 
The mature achenia have not yet been collected. In 
immature fruiting heads, the ovaries are broadly winged, 
33 
hee eed 
