678 OftDER 135. ALtSXiACE.E. 



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

 obovate-falcate.^River swamps, 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, crossed by the veinletSs Fls. white, showy. 

 (S. falcata Ph.) 



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

 La. to Tex. 



4 S. graminea MX. Lvs. ovate-lanceolate, varying to linear, rarely sagittate; 

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

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

 or mu4 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 lanccovate leaves constitute a well 

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



5 S. pusilla Xutt. Petioles (leaves?) short, linear, oltuse, summits only folia- 

 ceous ; scape simple, shorter than tho leaves ; fls. few, fertile one solitary, dtflexed ; 

 stam> mostly 7. -A diminutive species on muddy banks, N. Y. to Ga. Leaves rarely 

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

 4 '7, the lowest one only fertile. Aug. 



G S. natans MX. Lvs. floating, oval-lanceolate, obtuse, o-veined, tapering to the 

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

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

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



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

 scapes several, as tall (6 10) as tho Ivs; fls. in pairs, tho lower pair (fertile) on 

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

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



4. TRIGLCTCHIN, L. ARRO^V GRASS. (Gr. rp/f, three, y/M^ 

 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, cxtrorse ; ovaries 1-ovnled ; stigmas adnate ; fruit 

 clavate, composed of 3- C united, indehiscent, 1-seeded carpels. 2 Lvs. 

 grass-like, all radical, 



1 T. maritimum L. Fruit ovate-oblong, grooved, e/6 united carpels ; scape longer 

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

 and at Salina, N.Y., also lake shores, N. Y.,"Wis. Lvs. linear, semi-cylindric, smooth, 

 thick, 6 12' long, less than aline 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 G linear carpels, each containing a linear seed. The plant 

 has a sweetish taste, and cattle are ibnd of it. July. (T. elatum. Nutt.) 



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

 than tho leaves. In marshes, Salina^ N. Y. N. to Arc. Am. Leaves very nu 

 merous, fleshy, smooth, very narrow. Scape 6 12' high, ending in a racen>c 

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

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

 of 3 very slender carpels. July. 



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

 guished botanists.) Sepals and petals oblong, acute, persistent; sta. 0, 

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

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

 ear, sheathing at base. 



S. palustris L. A rush-liko plant, in swamps, Vt., Penn., to 111. 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 r.t base. Racemo 

 terminal, 5 S-rlowered. Flowers yellowish-green, on short pedic?!?, each axil- 

 lary to a b-act. Stamens hr<jo, c?:3:rt~J, cn"ct. Jucp, July. 



