124 LYTHRACEJE 



1. D. Anglica, Hudson. Leaf -blade cuneate: petals much exceeding the epalii 



LYTHRACEJS. 



Calyx slightly 4-angle J, short: petals none: capsule globular 2 



Petals 4: capsule striate under microscope, splitting into 3 or 4 raises. 2 



Calyx cylindrical, striate, 4 to 7 teeth with smaller ones between: petals 4 to 7 (usually 

 6): stamens as many or twice as many: capsule 2-celled. 8 



1. ATVTlvrATJTA t Linnaus, 

 1 . A. latifolia, L. Stems square: leaves opposite, eared at base, slender. 



2. ROTAI*A, Kcehne. 

 1. B. ramosior, Keen. Capsule not bursting irregularly. 



3. LYTHBTTM, Linnaeu*. 



1. I*, hyssopifolia, L. Petals very small: stamens usually 4 to 6, included. 



2. L. album, HBE. Calyx 3 or 4 lines long. 



3. L. Californicum, Watson. Calyx 6 to 9 lines long: rose-purple petals longet 



HALORAGEJE. 



Leaves linear or broader in whorls of 4 to 12: flowers sessile, axillary 1 



Leaves in whorls of 3 or 4, mostly pinnate, segments filiform: flowers axillary ......... 2 



1. HIPPURIS, Linnaeus. 

 1. EL vulgaris, L. Style filiform, stamen 1: calyx globular, limb entire. In ponds. 



2. MYRIOPHYLLUM, Linnaras. 



1. M. spicatum; L. Stamens 8: flowers spicate: petals ovate, greenish. 



2. M. hippurioides, Nutt. Stamens 4: petals white, obovate: toothed bracts 3 to 6 

 lines long. Both species aquatic. 



ONAGRACEJ2. 



Calyx divided to the ovary, lobes persistent: aquatic or creeping marsh herbs: solitary A *** 9 



in axils of entire leaves. 

 Petals 4 to 6, yellow: stamens 8 to 12 : leaves alternate 1 



