60 ONAGRACEJB. 



Petals none of 4, reddish: stamens 4: leaves opposite , 8 



* * Calyx deciduous above the ovary: parts of tlie flowers in Jfs. 

 t Antliers versatile (attached near the middle to the filament). 



a. Seeds with a tuft of silky hairs, stamens 8: lower leaves often opposite. 



Calyx-tube long-funnelform above the ovary, scarlet:. petals 2-lobed 3 



Calyx-limb 4-parted: anthers elliptical or roundish , 4 



b. Seeds not tufted with hairs: leaves all alternate: calyx-lobes reflexed. 

 Calyx divided nearly or quite to the ovary: anthers of two forms (or only 4). 



Leaves entire: small or minute flowers: capsules not an inch long 5 



Leaves pinnatifidly lobed: capsules 3 or 4 inches long 6 



Calyx forming a cup or tube (often long and slender) above the ovary 7 



1 1 Anthers erect, attached at or near the base to the filaments; those opposite the petals 

 shorter or sterile, rarely wanting: calyx-lobes reflexed, except in No. 11: annuals. 



Calyx-tube obconical above the ovary: petals not long-clawed 8 



petals long-clawed 9 



Calyx-tube filiform above the ovary: petals long-clawed, lobed 10 



Calyx-lobes erect: petals not clawed, 2-lobed: stigma lobes short 11 



Calyx-lobes spreading: pstals clawed, entire: stigma discoid, entire 12 



* " Minute white flowers in bractless racemes, the parts in 2's 13 



1. JUSSLffiA, Linnaeus. 



1. J. repens, L. Stems a foot or more long, rooting at base: style stout, hairy. 

 Var. Californica, Watson. Smaller flowers 6 to 8 lines broad: style slender, glabroum. 



2. LTJDWIGIA, Linnaeus. 

 1. L. palustris, Ellis. Smooth, creeping or floating: flowers sessile: capsule small. 



3. ZATJSCHNERIA, Presl. 

 1. Z. Californica, Presl. Villous or tomentose: calyx 10-1G lines long above ovary. 



4. EPILOBIUM, Linnaeus. 



Flowers large: stament and style declined: stigma lobes finally fprtading or recurved: 



perennial. 



Stem erect, simple: petals clawed, obovate, lilac-purple 1,2 



Stem decumbent, 5 to 3 inches long: leaves opposite, glaucous 3 



Flowers yellow 4 



* * Flowers small, parts all erect: stigma club-shaped or cylindrical. 



Perennial: petioles present but short: in wet places: not alpine 6, 6 



Perennial: stems with 2 pubescent lines: leaves mostly opposite: alpine 7, 8 



Perennial: leaves sessile: hoary or glaucous: leaves mostly opposite: not alpine. 0, 10, 11 



