36 MALLOW ORDER 



1. Leaves opposite, at least most of them 



a. Leaves wholly entire 



(1) Leaves with the sides unequal at base 



(a) Plant smooth 

 x. Seeds smooth 



(x) Stems prostrate, leaves rounded to 

 ovoid, 3-7 mm. long; appendages 

 tiny E. serpens 



(y) Stems erect or ascending; leaves 

 linear to oblong, 1-3 cm. long; ap- 

 pendages large, white, petal-like E. petaloidea 

 y. Seeds wrinkled crosswise 



(x) Appendages of the involucre large 



and petal-like, usually white E. albomargindta 



(y) Appendages small and inconspicu- 

 ous E. Fendleri 



(b) Plant hairy ; leaves lance-ovoid, very 



unequal at base E. lata 



(2) Leaves with the sides equal at base, linear 



to lanceolate, smooth ; plant erect E. hexdgona 



b. Leaves variously toothed, often but slightly 



(1) Leaves small, about 1 cm. or less long, 



ovoid to oblong, unequal at base 



(a) Plant smooth 



x. Seeds wrinkled crosswise E. glyptosperma 



y. Seeds pitted, scarcely or not at all 



wrinkled E. serpyllifolia 



(b) Plant hairy E. stictospora 



(2) Leaves larger, mostly more than 3 cm. 



long, equal at base E. dent at a 



2. Leaves alternate 



a. Upper leaves white or white-margined ; ap- 



pendages large and petal-like E. margindta 



b. Upper leaves green ; appendages none or in- 



conspicuous 



(1) Leaves toothed, spatulate to broadly ob- 



lanceolate ; capsule warted E. dictyosperma 



(2) Leaves entire 



(a) Leaves linear; capsule warted E. cyparissias 



(b) Leaves broadly oblong to ovoid or 



rounded ; capsule smooth E. montdna 



