368 92. TTPHACE^, — 93. aeacejb. 



744 R. vs.. 326. — St, erect, about 2 feet high ; lower branches 

 with several heads, 1 — 3 fertile, the rest barren. Heads sphe- 

 rical. L. long, linear, erect. — Ditches. P. VI. VII. E. S. I. 



2. S. sim'phx (Huds.) ; 1. trigonous at the base, st. simple, 

 stigma linear-subulate, fr. slightly stalked subfusiform. — E. B. 

 745. R. ix. 325. — St. 1 — 2 ft. high, lon^, erect or ascending. 

 L. long, often floating (and then often mistaken for S. natans) ; 

 sheath slightly furrowed, not inflated. Heads many ; barren 

 several, sessile ; fertile shortly stalked, especially the lowest. 

 Pr. oblong, narrowed into a long beak, elliptie-fusiform. — 

 Ditches. P. VII. E. S. I. 



3. S. ndtan» (L.) ; st. simple flaccid, floating 1. very long 

 linear from a dilated sheathing base, heads many distant, lower 

 fertile heads stalked, mah heads several sessile, stig. linear-lan- 

 ceolate, fr. stalked oblong not longer than its subulate beak. — S. 

 aMne_ Schn. Sy. E. B. 1389. R. ix. 417.— St. much thicker 

 than in the next plant. L. grass-green, very long. Male heads 

 fewer in our plant than in the Swedish. — Lakes. Snowdon. 

 Patterdale. Loch of Drum, Scotland. Connemara, Ireland. 



p.vin. E. S.L 



4. S. min'imum (Fr.) ; st. simple flaccid, 1. linear floating 

 blunt not enlarged at the base, heads few racemose or spiked 

 distant, only 1 male head, stig. short oblong-lanceolate, _/r. sessile 

 ovoid shortly beaked. — S. natans Sm., E. B. 273. R. ix. 324. — 

 St. slender. L. pale, pellucid, long. Lowest fertile heads 

 sometimes very shortly stalked. [Often 2 male heads in Ireland 

 (A. G. More). S.JluUans Fr. ?]— Lakes and ditches. P. VH. 

 vni. E. S. I. 



Order XCIII. AEACE^. 



FL monoecious or perfect, placed on a spadix and often in 

 a spath. Barren and fertile fl. usually on different parts of the 

 spadix. Perianth none, or of 4 — 8 scales. Stam. many or 

 definite. Anth. turned outwards. Ovary free, with 1 or more 

 cells. Stigma sessile. Fr. succulent. Embryo slit on one side. 

 — Arum has abundant raphides, Acorus none. 



Tribe I. ORONTEJi. Spath like a continuation of stem. Fl. 

 perfect. 



spad 

 inferior, persistent. Stam. 6, filiform, 



Tr. II. AREJE. A spath convolute at the base. Fl. monoe- 

 cious. 



