EUPHORBIACEAE (SPURGE FAMILY) 



8 EUPHORBIACEAE. Spurge Family. 



1 RfCINUS CASTOR BEAN. (R. comm&nis*) 



2 ACALtPHA. 



i a Wild plant with green leaves 



THREE-SEEDED MERCURY. (A. virginica.) 

 b Cultivated plant, usually with variegated leaves 



GARDEN ACALYPHA. (A. wilkesidna* ) 



3 EUPHORBIA. 



1 a Inflorescence subtended by bright red leaves ; shrub 



cultivated in pots POINSETTIA. (E. pulcherrima.*) 



b Inflorescence not subtended by red leaves 2 



2 a Leaves Vz-i in. long, linear; plants clustered; involucre 



cups in numerous, yellowish-green umbels 



CYPRESS SPURGE. (E. cyparissias.*) 

 b Plants not completely as in a 3 



3 a Appendages of involucre white, petal-like, showy; in- 



volucre cups in umbels 4 



b Appendages of involucre not as in a 5 



4 a Leaves 1-2 in. long, green. FLOWERING SPURGE. (E. corolldta.) 

 b Leaves 2-4 in. long, white or the upper ones with white 



margins . . . .SNOW-ON-THE-MOUNTAIN. (E. margindta.*) 



5 a Capsule about % in. in diameter; glands of involucre 



crescent-shaped ; plant cultivated in gardens and es- 

 caped MYRTLE SPURGE. (E. Idthyrus*) 



b Capsule ^4 in. or less in diameter; plants wild 6 



6 a Plants prostrate, hairy 7 



b Plants erect or ascending 8 



7 a Leaves usually blotched ; capsule hairy 



MILK PURSLANE. (E. maculdta.) 

 b Leaves not usually blotched; capsule not hairy 



HAIRY SPURGE. (E. hirsuta.) 



8 a Leaves toothed, oblique at base 



UPRIGHT SPOTTED SPURGE. (E. nutans.) 

 b Leaves entire, not oblique at base 



WILD IPECAC. (E. ipecacudnhae.) 

 4 CODIAfcUM CROTON. ( C. variegdtum.*) 



9 CALLITRICHACEAE. Water Starwort Family. 

 i CALLITRICHE. 

 i a Fruit oval, longer than the styles 



WATER FENNEL. (C. palustris.) 

 b Fruit obovate, shorter than the styles 



WATER STARWORT. (C. heterophylla.) 



17 SAPINDALES. Soapberry Order, 

 i EMPETRACEAE. Cro<wberry Famity. 

 i CORfcMA BROOM CROWBERRY. (C. conrddii.) 



i So 



