ALISMACi:.E. (WATKH-ri.ANTAIN KAMII.V.) 5o5 



^ or .} the length of the sterile ; claws of the petals purple-tinged ; filaments 

 not longer than the anthers ; and aehenes almost orbicular, very hroadly winged 

 and with a short straight boak. 



Var. pub^scens, Kngelm. Upper part of petiole and scape and espe- 

 cially the orlii(ular-o\ate obtuse bracts and sepals pubescent or woolly; beak 

 of fruit horizontal. — N. J. and Penn. to Ga. 



Var. (?) gracilis, Kngelm. Lobes of the sagittate leaves very narrowly 

 linear ( h - 2" wide) ; achene narrowly cuneate-obovate (2" long), tlie beak long, 

 stout, and strongly recurved, the sides usually strongly 1 -3-crested. (S. cris- 

 tata, K n;/rl III. I ) — Mdss. to western N. Y.; Iowa. 



2. S. lancifblia, L- vScape 2-5° high, with several of the lower whorls 

 fertile; leaves lanceolate or lance-oblong, rarely linear, all with a tapering 

 base, thick or coriaceous (6-18' long and on a long and stout petioje, never 

 sagittate), the nerves mostly arising from the very thick midrib ; bracts ovate, 

 acute or acuminate; pedicels sleuder, the fertile scarcely shorter than the 

 sterile ones; filaments pubescent; achenes falcate, winged on the back, 

 pointed with an incurved beak. — Swamps, Md. to Ky., Mo., and southward. 

 (W.Ind.) 



* * Filaments veri/ short, icith enlarged mostlij glandular base ; anthers ovate or 

 short-oblong ; fruiting heads small; bracts more or less connate; leaves verj 

 rareli/ sag it late. 



3. S. heterophylla, Pursh. Scape weak (3' -2° high), at length pro- 

 cumbent ; leaves lanceolate or lance-oval, entire, or with one or two narrow 

 basal sagittate appendages; bracts roundish, obtuse; flowers of the lowest 

 whorl fertile and almost sessile ; the sterile on long pedicels ; filaments glan- 

 dular-pubescent ; achenes narrowly obovate with a long erect beak. — N. Eng. to 

 Fla., west to Minn, and Mo. Varies as to foliage, the leaves being broad 

 (var. ELLfrxicA, Engelm.), or rigid and narrowly lanceolate with stout peti- 

 oles (var. KfoiDA, Engelm.), or nearly linear (var. axgi-stif6lia, P^ngelm.) 



4. S. graminea, Miclix. Scape 3' -2° high; phgllodia flat, mostly 

 broadlg linear, uruiitinate ; leaves ovate-lanceolate to linear, on long slender 

 petioles, sometimes reduced to the petiole merely ; bracts rather obtuse ; whorls 

 of flowers often few, all stamiuate or the lower fertile ; pedicels slender, spread- 

 ing, nearly equal ; fllaments 15 - 20, glandular-pubescent ; achene small (V' long), 

 narrowly obovate, almost beakless, winged on the back, flat and scarcely costate 

 on the sides. — N. Eng. to Minn., south to the Gulf ; very variable. 



5. S. t^res, Watson. Phyllodia terete, I'ery acutely attenuate upwnn], 3- 

 12' long, very rarely bearing a narrow blade; scape ^-1^° high; bracts con- 

 nate at base; pedicels in 1-3 whorls, all very slender and spreading, 1 or 2 

 fruiting, ^-1' long; filaments 12, dilated, pubescent; achene obovate, 1" long, 

 with an erect beak, the margins and sides crenately several-crested. — In shallow 

 water, S. New Eng. to N. J. (Hyannis, Mass., Deane ; Wading Kiver, L. I., 

 Miller; barrens of N. J., Torre y.) Phyllodia usually very strongly nodose. 



6. S. nutans, Michx., var. lor^ta, Chajjui. Usually dwarf; leaves lin- 

 ear, strap-shaped, obtuse or arutish, 1-6' long, equalling or shorter than the 

 scape, very rarely with a narrow blade; pedicels in 1 -3 whorls, only 1 or 2 

 irnxixng, stouter and recurved ; bracts connate or spathe-like ; yi7rtHjf>;i/s 6-8, 

 glabrous; achene obovate, short-lxakcd, 1" long, the margins and sides c/ena/c/_y 



