MONOECIA— POLYANDRIA. Myriophyllum. 143 



pas 4, oblong, with a thin coat. ISluts solitary, with a 

 l)ard thick shell, containing a solitary kernel, in a simple 

 skin. GcErtner, 



Gaertner observes that this genus is evidently dicotyledo- 

 nous. Its natural order is no less evidently what Mr. 

 Brown has called Haloragece, 



The species are all aquatic and herbaceous, with whorled, 

 pinnatifid leaves^ and whorled, or axillary, j^o«XTr5, whose 

 organs are not always altogether separated. 



1. M. spicatum. Spiked Water-Milfoil. 

 Flowers in whorled, interrupted, leafless spikes. 



M. spicatum. Linn. Sp. PL 1409. WiUd.v. 4. 406. Fl. Br. ]021 . 



Engl. Bot. V.2. t. 83. Hook. Scot. 272. FL Dan. t. 681. 

 Pentapteris n. 993. IlalL Hist. v. 1. 424. 

 Potamogiton foliis pennatis. RaiiSyn. 150. 



Millefolium aquaticum pennatum spicatum. Bauh. Prodr. 73./. 

 M. pennatum aquaticum. Bauh. Hist. v. 3. p. 2. 775./. 

 Feather Pondweed. Pttiv. H. Brit, t 6./. o. 

 /3. Millefolium aquaticum ])ennatum minus, foliolis singularibus 



latiusculis flosculis subjectis, donatum. Moris, v. 3. 622. sect.ij. 



i. 4./ 7. DHL in Raii Syn. 151. 

 Fine Feather Pondweed. Petiv.H. Brit. t. 6./. 6. 



In ditches and pools frequent. 



/3. In a ditch near Lodden bridge, not far from Reading. J. Bo- 

 hnrt. In the river on Hounslow heath. Doody. 



Perennial. July, August. 



Herb smooth, floating under water, with branching, round stems, 

 and dark-green, finely pinnatifid, spreading leaves, 4 in each 

 whorl. FL in several whorls, rising above the surfiicc, on simj)le, 

 terminal, leafless branches, with 4 small entire hracteas under 

 each whorl. Cal. acute, finely fringed. Pet. reddish. 



The variety /3, with one large simple obovate lea/ under each 

 whorl o{ /lowers, ifMorison's plate be correct, is very remarkable. 

 It has not fallen in my way. 



2. ]M. vcrticillatum. Whorled AA^ater-Milfoil. 

 Flowers all axillary. 



M. vcrticillatum. Linn.Sp.VlA WK). Jf'illd.v.A. 107 . I'l. Br.\Cr22. 



Engl. Bot. v.\. t.2\H. EL Dan. t. 1016. Ehrh. Ihrb. 60. 

 M. aquaticum minus. Clus. Hist. v. 2. 2.V2./. Pann. 71 !•/' 712. 

 Pentapteris n. 992. llnlL Hist. v. I. 42 1. 

 Penta|)ten)pliyllou acpiaticum, flosculis ad foliorum nodos. Dill. 



(iis.s. 1 12. append. I2(i. /. 7. Raii ^'^yn. 316. 

 Millefolium aquaticum minus. Bauh. Hist. v. 3. p. 2. 77o./. 



