Genus 5. 



WATER PLANTAIN FAMILY 



13. Sagittaria Eatonii J. G. Smith. 

 Eaton's Sagittaria. Fig. 243. 



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

 11: 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"-i7i" long, 

 acute or acuminate; bracts ovate, about 1" long, 

 united at the base; pedicels of the pistillate 

 flowers filiform, mostly less than 5" long, those 

 of the staminate flowers longer than the former; 

 sepals ovate to ovate-lanceolate, becoming ij"- 

 2" long; corolla z¥'-A,i" 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 Barely with spreading or recurved 

 basal lobes, 2'-6' long, ¥'-3" wide, 3-5-nerved, the nerves 

 distinct to the base, some of them occasionally reduced to 

 flattened phyllodia; bracts ovate, acute, i4"— 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, V'-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. 



Gard. 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'-6' long; bracts 

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

 flowers 8"-i4" broad; fertile pedicels stout, diver- 

 gent in flower, reflexed in fruit, Y-2.V 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. 



