678 Order 135.— ALISMAOHJE. 



cellate; bracts broad-ovate, short- pointed; fil. hairy, longer than the anthers ; ach, 

 obovale-taleate. — River swamps, Conn. ? Va. to Fla. and La. (Hah'). Stalks slout, 

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

 the veins diverging from the midvein, crossed by the veiniets. Fla. white, showy. 

 (i. falcate Ph.) 



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

 La. to Tex. 



4 G. grarninea Mx. Lvs. ovate-lanceolate, varying to linear, rarely sagittate; 

 scapj erect, slender, longer than the leaves ; lower whorls fertile ; ail the pedicels 

 slender, equal; filaments short as the anthers; ach. beaktess. — In shallow w;.ter 

 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; stain, few. The forms with lance-ovate leaves constitute a well 

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



5 S. pu3illa Nutt. Petioles (leaves?) short, linear, obtuse, summits only folia- 

 ceous; scape simplo, shorter than tlio leaves; fts. few, fertile one solitary, deftexed; 

 stain, mostly 7. — A diminutive species on muddy banks, N. Y. to Ga. Leaves rarely 

 Bubulate, an inch or two long, less than a lino wide. Scapo 2 — 4' high. Flowers 

 4 — 7, the lowest one only fertile Aug. 



6 G. natans Mx. Lvs. floating, oval-lanceolate, obtuse, 3-veined, tapering to tho 

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

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

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



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

 scapes several, as tall (G — 10') a3 tho lvs; fls. in pairs, the lower pair (fertile) on 

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

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



4. TRIGLCTCHIN, L. Arrow Grass. (Gr. rgig y three, yXc^xk, a 

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

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

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

 olavate, composed of 3 — G united, indehiscent, 1 -seeded carpels. — If Lvs. 

 grass-like, all radical. 



1 "3. maritimum L. Fruit ovate-oblong, grooved, of & united carpels ; scapo longer 

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

 and at Saiina, N. Y., also lake shores, "Wis. I Leaves linear, semi-cylindric, smooth, 

 (hick, 6 — 12' long, less than a lino wide. Scapo obtusely angled, simple, 9 — 18' 

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

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

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



2 T. palustre L. Fruit nearly linear, of 3 united carpels; scapo scarcely longe 1 . 

 than the leaves. — In marshes, Saiina, N. Y. N. to Arc. Am. Leaves very nu 

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

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

 di-r 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. caulinc, lin- 

 ear, sheathing at base. 



S. palustris L. A rush-liko plant, in swamps, Vt. to Perm., rare. Root-stock 

 horizontal, fleshy. Stem about a foot high, simple, angular. Leaves semi-cylin- 

 dric, 4 — G' long, in tho barren shoots much longer, sheathing at base. Racemo 

 terminal, 5 — 8-riowerod. Flowers yellowish-green, on short pedicels, each axil- 

 lary to a bract. Stamens large, exscrted, erect. July. 



