GENUS 5. 



WATER PLANTAIN FAMILY 



13. Sagittaria Eatonii J. G. Smith. 

 Eaton's Sagittaria. Fig. 243. 



Sagittaria Eatonii J. G. Smith, Rep. Mo. Bot. Card. 

 ii : 150. 1899. 



Monoecious, scape very slender, 4' -6' tall, 

 Leaves represented by flat phyllodia which are 

 attenuate from broad bases and often also by 

 longer blade-tipped petioles, the blades linear 

 or narrowly linear-lanceolate, io"-i7*" long, 

 acute or acuminate; bracts ovate, about i" long, 

 united at the base ; pedicels of the pistillate 

 flowers filiform, mostly less than 5" long, those 

 of the staminate flowers Iqnger than the former ; 

 sepals ovate to ovate-lanceolate, becoming ii"- 

 2" long ; corolla 3J"-4i" broad ; filaments sub- 

 orbicular, pubescent, much shorter than the 

 anthers; anthers suborbicular, conspicuously 

 larger than the filaments ; fruits not seen. 



On sandy shores, between low and high tide, 

 Massachusetts, Connecticut and Long Island, New 

 York. July-Sept. 



14. Sagittaria graminea Michx. Grass-leaved Sag- 

 ittaria. Fig. 244. 



Sagittaria graminea Michx. Fl. Bor. Am. 2: 190. 1803. 



Monoecious or dioecious, glabrous, scape simple, erect, 4'-2 

 tall. Leaves long-petioled, the blades linear, lanceolate or 

 elliptic, acute at both ends, or rarely with spreading or recurved 

 basal lobes, 2' -6' long, "-3" wide, 3-s-nerved, the nerves 

 distinct to the base, some of them occasionally reduced to 

 flattened phyllodia; bracts ovate, acute, i->"-3" long, much 

 shorter than the slender or filiform fruiting pedicels, connate 

 to the middle or beyond ; flowers 4"-6" broad ; stamens about 

 18; filaments dilated, pubescent, longer than or equalling the 

 anthers; achene obovate, ^"-i" long, slightly wing-crested on 

 the margins and ribbed on the sides, the beak- very short. 



In mud or shallow water, Newfoundland to Ontario and South 

 Dakota, south to Florida and Texas. Early leaves often purplish. 

 July-Sept. 



15. Sagittaria platyphylla (Engelm.) J. G. 

 Smith. Ovate-leaved Sagittaria. Fig. 245. 



Sagittaria graminea var. platyphylla Engelm. in A. Gray, 



Man. Ed. 5, 494. 1867. 

 Sagittaria platyphylla J. G. Smith, Ann. Rep. Mo. Bot. 



Card. 6: 55. pi. 26. 1894. 



Monoecious, glabrous, scape erect, simple, rather 

 weak, mostly shorter than the leaves. Leaves rigid, 

 the blades ovate, ovate-lanceolate or ovate-elliptic, 

 short-acuminate or acute at the apex, rounded, grad- 

 ually narrowed or rarely cordate or hastate at the 

 base, seemingly pinnately veined, 2 r -6' long ; bracts 

 broadly ovate, acute, connate at the base, 2" -4" long ; 

 flowers 8"- 1 4" broad ; fertile pedicels stout, diver- 

 gent in flower, reflexed in fruit, \'-2\' long; fila- 

 ments dilated, pubescent, rather longer than the 

 anthers ; achene obliquely obovate, winged on both 

 margins, the dorsal margin somewhat crested, the 

 sides with a sharp wing-like ridge. 



In swamps and shallow water, southern Missouri to 

 Mississippi and Texas. Phyllodia, when present, ob- 

 long or oblanceolate. July-Sept. 



