678 Oedeb 135.— ALISMACB^. 



cellate; braota broad-ovate, short-pointed; fil. hairy, longer than the anthers ; adi. 

 obovate-faloate. — Eiver awamps. Conn. ? Va. to Fla. and La. (Hale). Stalks stout, 

 3f or more, according to the depth of water. Leaves thick and leathery, 8 to 14', 

 the veins diverging from the midvein, oro38ed by the veinlets. Fls. white, showy. 

 (S. faloata Ph.) 



,fl. ? Very slender, erect, with nearly linear leaves ; bracts and sep. scabrous. — 

 La. to Tex. 



4 S. gramme a. Mx. Lvs. ovate-lanceolate, varying to linear, rarely sagittate; 

 soape erect, slender, longer than the leaves ; lower whorls fertile ; all the pedicels 

 slender, equal ; filaments short as the anthers ; ach. beakless. — In shallow water 

 or mud, common. Lvs. commonly very narrow, attenuate-pointed, 4 to 12' or 

 more. Scape 5 to 20' in height, the pedicels 1' or less. Flowers small, 8 or 9'' 



,. diam., white; stam. few. The forms with lance-ovate leaves constitute a well 

 marked variety. (S. simplex, Ed. 2.) 



5 S. pusiUa Nutt. Petioles (leaves f) short, linear, ohinse, summits only folia- 

 ceous ; scape simple, .shorter than the leaves ; fls. few, fertile one solitary, deflexed ; 

 stam. mostly 1. — A diminutive species on muddy banks, M" . T. to Ga. Leaves rarely 

 subulate, an inch or two long, less than a line wide. Scape 2 — 4' high. Flowers 

 4 — 1, the lowest one only fertile. Aug. 



6 S. nutans Mx. Lvs. floating, oval-lanceolate, obtuse, 3-veined, tapering to the 

 base, lower ones subcordate ; scape siAple, few-flowered ; lower ped. elongated. 

 In water, Penn. (Muhlenberg) to Car. Scape ' mostly erect, 3 — 6' long. Leaves 

 1 — 2' long. Flowers few, small, the upper sterile (EUiot). 



7 S. uliginosa Engelm. Lvs. oval-sagittate, rounded-obtuse, lobes triangular; 

 scapes several, as tail (6 — 10') as the lvs ; fls. in pairs, the lower pair (fertUe) on 

 thick pedicels, longer than the upper; bracts obtuse; ach. broad-obovate, long- 

 pointed. — St. Louis, perhaps not within our limits. 



4. TRIGIiO^CHIM, L. Arrow Grass. (Gr. rp/f, three, yhiixtg, a 

 corner ; on account of the 3-angled fruit.) Sepals and petals concave, 

 deciduous, the former inserted a little below the latter ; stamens 6, very 

 short ; anthers large, extrorse ; ovaries 1-ovuled ; stigmas adnate ; fruit 

 clavate, composed of 3 — 6 united, indehiscent, 1-seeded carpels. — If Lvs. 

 grass-like, all radical. 



1 T. maritimum L. jfruii ovate-oblong, grooved, o/ 6 «»tedcarpefa; scape longer 

 than the leaves. — A rush-like plant in salt marshes and ditches on the searcoast, 

 and at Salina, K. T., also lake shores, "Wis. I Leaves linear, semi-cylindric, smooth, 

 thick, 6 — 12' long, less than a line wide. Scape obtusely angled, simple, 9 — 18' 

 long, bearing a long raceme of 30 — 40 green flowers on pedicels 1—2" long. 

 Fruit separating into 6 linear carpels, each containing a linear seed. The plant 

 has a sweetish taste, and cattle are fond of it. July. 



2 T. paMstre L. , JVwi nearly linear, of 3 united carpels; scape scarcely longer 

 than the leaves. — In marshes, Salina, N. T. N. to Arc. Am. Leaves very nu- 

 merous, fleshy, smooth, very narrow. Scape 6 — 12' high, ending in a raceme 

 with rather remote, very small, green flowers on pedicels 2 — 3" long. The slen- 

 der fruit is attenuated at base, obtuse at apex, grooved and margined, consisting 



. of 3 very slender carpels. July. 



5. SCHEUCHZE'RIA, L. (To the Scheuchzers, two brothers, distin- 

 guished botanists.) Sepals and petals oblong, acute, persistent ; sta. 6, 

 with linear anthers ; stigmas sessile, lateral ; ovaries 1 — 2-ovuled ; cap- 

 sules inflated, compressed, 2-valved, 1 — 2-seeded. — 2^ Lvs. cauline, lin- 

 ear, sheathing at base. 



S. paltistris L. A rush-like plant, m swamps, Vt. to Penn., rare. Eoot-stock 

 horizontal, fleshy. Stem about a foot high, simple, angular. Loaves semi-oylin- 

 drio, 4 — G' long, in the barren slioots much longer, sheathing at base. Raceme 

 terminal, 5-^8-fiowered. Flowers yellowish-green, on short pedicels, each axil- 

 lary to a bract. ; Stamens large, oxserted, erect. July. 



