91. TTPHACEiE. 357 



3. Sagitta'ria Linn. Arrowhead, i 



1. S. sagittifdlia (L.); aBri'al 1. arroWsliaped with lanceolate 

 straight lobes, fl. -stalk simple, fl. whorled. — E. B, 84. R. vii. 

 t. 53. — Stolomfei'ous ; each runner ending in a tuber. The 1, 

 tha^ rise ajbpv,e,|;,he water are remariably arrowshaped, with the 

 3 parts nearly eijual. The submersed leafless petioles are linear. 

 PI. white.— Ditches and rivers. P. YUI. ' E. I. 



Suborder II. Butorriea. ' 



4. Btt'iomtjs Linn. Flowering Eush. 



1. B. umheOdtus (L.); E. B. 651. iJ.^vii. t. 58.— Flowerstalk 

 radical, 2 — 8 feet hJghj overtopping the leaves, bearing an irre- 

 gular maiiy-flowered simple umbel with 'scarions bracts and a 

 membranous -S-leaved involucre. PI. rose-coloured. L. radical, 

 linear, triangular. — ^Rivers and ponds. P. VI. YII. E. I. 



Suborder, III. Juncaginea. 

 5. SoHErrcHZE'BiA. Linn. 



1. S.pahis'tris (l..).—E. B. '1810. St. 78. 4 R. x. 419.— St. 

 6 — 8 in. high, erect. L'. distichous, few, alternate, semicylin- 

 diieal, blunt, with a minute pore ott the upper side at the ap6x. 

 Racenle terminal, of fibout 5 greenish flowers. Caps, abont 8, 

 much, inflated.! — Sphagnous parts of bogs, rare. P. Vll. E. S. 



6. TETSLo'cHrfr Linn. Arrow-grass. 



1. T. mai-Hfimum fL.) ; fr. ovoid of 6 combined carpels. — 

 E.B. 255. iJ.vii. t. 52. — L. radical, linear. FL inalax simple 

 spike or raceme, greenish. — Muddv salt marshes. P. YII. VUI. 



■; ■ ' ■■' ■■■"■ ■' ■ '! ^ ' ■■ , E.S.I. 



2. T. palus'tre (X.) ; fr. linear angular of 3 combined caippls. 

 — E- B. 366. R. vii t. .51. — Slenderer than the. preceding, but 

 closely resembling it,' 8 — 10, in. high. Stoloniferoua.— iMa^IiY- 

 piaces". P. VI. VII. ' E.S.I. 



Order XCI. TTPHACE^: ' 



Fl. monoeftious, many, closely placed on a spadix without a 

 spath; barren and fertile on different parts of the' spadix. Pe- 

 rianth of 3 or more scales or hairs. Stam. 1 — 6, distinct or 

 monadelphous. Anth. erect. — Fertile fl. Ovary free, solitary, 1- 

 celled-; ovule 1, pendulous. Style simple. Stigma unilatCTaL 

 Er. dry or spongy. Embryo with a. cleft on one side. 



