Flex.cal. 55. HALORAGiE, 340. Myviophyl. 557 



III. 340. MYRIOPHYLLUM. Dioscor. Waier-milfoil. 

 Plant Kionoicous ; calyx 4-parted. — Male. Stamens 8. — '• 

 Fem. Ovary 4-celled ; stigmata sessile, four-toothed. — 

 Leaves whirled, many-parted, lobes linear ; flowers axil- 

 lary, spiked ; upper flowers male ; lower female. 



1. Myriophyllum spicaium. Spiked tuater-milfoil. 

 Leaves 4 in a whirl ; male flowers interruptedly spiked, 



leafless ; female flowers axillary ; stigmata villous. 



Potainogiton foliis pennatis, Rail Syn. 150, 17. 

 Millefolium aquaiicum pennatuin spicatum, Park. 1257. 

 Myriophyllum spicatum, Lin. S. P. 1409. 

 Feathered pond-weed. 



Ditches and ponds ; perennial ; July and August. 

 Herb floating ; stem branched, comb-like ; spike single ; 

 IractecB ovate, not cut, 4 to each whirl; male floiver reddish. 



jS. minus. Plant small. 



Potamogiton q. Millefolium aquaticum pennatum minus, foliolis singu- 

 laribus latiusculis flosculis subjectis donatum, Dillen in Raii Syn, 151, 18. 



2. Myriophyllum verticil latum. Whirled water-milfoil. 

 Leaves 5 in a whivl; Jlowers all axillary, whirled ; stig- 

 mata thick, feathered at the tip. 



Pentapterophyllon aquaticum flosculis ad foliorum nodes, Raii Syn, 

 310, I. 



Millefolium aquaticum minus, Ger, em, 827,6; Park, 1257. 

 Myriophyllum verticillatum, Lin, S. P. 1410. 



Ditches and ponds ; perennial ; July. 

 Herh floating ; twigs upright, leafed to the top ; 2ipper 

 leaves smallest ;^0M''er5 rarely hermaphrodite. 



Fam. XXI. 56. ONAGRARIJ5. Jussieu. 



Calyx adherent, 2 or 4-parted; petals 2 or 4, on the 

 top of the calyx ; stamens 2, 4, or 8, alternating with the 

 petals ; style 1 ; stigmata 2 or 4 ; ovary 2 or 4-celled ; 

 ovules many, on a central placentarium, or 1 at the bottom 

 of each cell ; perisperm 0, or very thin ; corculum straight, 

 central ; radicle below. — Plant herbaceous ; leaves alter- 

 nate or opposite ; flowers racemose or axillary. 



Stamens 2; petals 2 '^ car ceride 2 -seeded CiRCiEA. 341. 



Stam. 8; pefo/^ 4, upright, regular; 

 capsule 4-celled ; seeds naked QEnothera. 342, 



Stam. 8, declining; pet, 4, irregular; 

 capsule 4-celled; seeds comose Cham^eneriom. 543. 



Stam. 8, upright ; pet. 4, regular ; 

 capsule 4-ceUed ; seeds comose Epilobium. 344. 



