MONOECIA— TKIANDRIA. Sparganium. 75 



2. S. simplex. Unbranched Upright Bur-reed. 



Leaves triangular at the base, with flat sides. Common 

 flower-stalk simple. Stigma linear. 



S. simplex. HudsA^l. FLBr. 902. Engl. Bot.v.W. t. 745. IVilld. 



Sp. PL V. 4. 199. Curt. Lond.fasc. 5. t. 67. Hook, Scot. 260. 



Dic/is. H. Sice. fasc. 6.7. 

 S. superaxillare. Ehrh. Calam. 129. 

 S. erectum /3. Lbin. Sp. PL 1378. 



S. n.34j.* Linn. EL Lapp. ed. 1.271, ed.2. 280. Herb. Linn. 

 S. n. 1303 p. HalL Hist. v. 2. 162. 

 S. non ramosum. Raii Sijn. 437. Bauh. Pin. 15. Theatr. 231. f. 



Moris. v.'S. 245. sect. 8. t. 13./. 3. 

 S. alterum. Lob. Ic. 80./. Dalech. Hist. 1019./ i^aw/i. //ii/.u. 2. 



541./ 

 S. latitolium. Ger. Em. 45./. 

 Sparganium. Tillands. Ic. \5.f. 



In pools and ditches, especially on a gravelly soil. 



Perennial. Julij, August. 



Linnteus, Ilaller and Leers have considered this as a variety of the 

 preceding, but Hudson, Curtis, Ehrhart and succeeding botanists 

 have well distinguished them. Tlie present is a smaller plant. 

 Tlie intermediate spaces, between the 3 angles, at the base of 

 each radical leaf, is flat, not concave, as Curtis, I believe, first 

 remarked. The stem is erect, perfectly simple, not branched or 

 panicled, the lowermost head o( flowers only being usually ele- 

 vated on a partial stalk. Calyx green, or not of so deep a brown 

 as in the former. /^«//?eri- rather yellower. 67i^^wa long and li- 

 near, for the most part solitary. 



o. S. natans. Floating Bur-reed. 



Leaves floating, flat ; concave at the base. Common flower- 

 stalk simple. Stigma ovate, very short. Ball of barren 

 flowers mostly solitary. 



S. natans. Linn. % 7'/. 1378. /r7//(/. r.4. 200. ElBr.Wl. Engl. 



Bot. V. 4. t. 273. Jlook. Scot. 260. EL Dan. t. 260. Dicks. H. 



Sicc.fasc. 6. 8. Ehrh. Calam. 110. 

 S. simplex /3. JJHds.4()\. 

 8. n. 1301. HalL Hi^it. v. 2. 163. 

 S. minimum. RaiiStjn.437. Bauh. Pin. 15? Prodr.24} 



In muddy fens, or slow rivers. 



In the Norwich river. Mr. Rose. Ponds in Scotland. Dickson. 



Common in tiie lakes about Lochmaben, Dumfries.shire. Mr. J. 



Burqcss, 1/82. In Hurwell fens, Cambridgeshire. Rcv.Mr.Hnn- 



sfcd. Near Manthester. />>. HulL 

 Perennial. Julu. 



