200 CALLITRICHACEAE 



Central and Atlantic States. — Petmsylvania : Northampton ; Bucks ; 

 Frankwn ; Huntingdon ; Centre. 



7. Euphorbia dentata Michx. Toothed Spurge. (Man. p. 594 ; 

 I. F. f. 2J24.) In dry or moist soil, Pa. to S. Dak., Tenn., La. and Mex. 

 — Pennsylvatiia : Lancaster. 



8. Euphorbia Ipecacuanhae L. Wild Ipecac. Ipecac Spurge. 

 (Man. p. 594 ; I. F. /. 2j2j.) In dry sandy soil. Conn, to Fla., mostly 

 near the coast. Also in southern Ind. — Pennsylvania : Bucks, Turkey 

 Hill ; Crawford. 



9. Euphorbia Lathyris L- Caper OR Myrtle Spurge. (Man. p. 

 594; I. F._/^j^7.) In waste places, N.J. to N. C. Also in Calif. Native 

 of Eu. — Pennsylvayiia : Northampton ; Bucks ; Chester ; Lancas- 

 ter ; Lebanon ; Franklin. 



10. Euphorbia DarUngtomi A. Gray. Darlington's Spurge. 

 (Man. p. 594; I. F. /. 232S.) N. Y., Pa. and N.J. to N. Q.— Pennsyl- 

 vatiia : Chester ; Lancaster ; Franklin ; Centre. 



11. Euphorbia platyphylla L- Broad-leaved Spurge. (Man. p. 

 595; I. F. y. 2JJ0.) Along the shores of the St. Lawrence River and 

 the Great Lakes. Nat. from Eu. — Pennsylvatiia : ERIE ; Clinton. 



12. Euphorbia Helioscopia L. Sun Spurge. Wartweed. (Man. p. 

 595 ; I. F. /. 2JJ2.) In waste places in the valley of the St. Lawrence 

 and along the Great Lakes, extending south to N. H., N. Y. and Ohio. 

 Nat. from Eu. — Pennsylvania : Erie ; Clinton. 



13. Euphorbia Peplus L. PETTY Spurge. (Man. p. 595; I. F./. 2js3-) 

 In waste places, western N. Y. to N. J. and Pa. Adv. from Eu. — Pennsylva- 

 nia : Lancaster ; Northajipton, streets of Easton ; Allegheny'. 



14. Euphorbia conunutata Engelm. Tinted Spurge. (Man. p. 

 595 ; I. F./. 2jj^.) On hillsides, Pa. to Minn., Fla. and Mo. — Pennsyl- 

 vania : Lancaster, Safe Harbor ; Franklin ; Centre ; Allegheny. 



15. Euphorbia Esula L. Leafy' Spurge. (Man. p. 595; I. F./. 

 ^335-) IQ waste places, Mass. to N. Y. and Mich. Nat. from Eu. — 

 Pennsylvania : Franklin. 



16. Euphorbia lucida Waldst. & Kit. Shining Spurge. (Man. p. 

 596; I. F. /. 2jj6.) In fields, southern N. Y. and Pa. Nat. from Eu. — 

 Pennsylvania : Susquehanna.. 



17. Euphorbia Cyparisslas L. Cypress Spurge. (Man. p. 596; I. 

 F- /• ^337- ) Waste places, N. Eng. to Va. and to Kans. Nat. from Eu. — 

 Pennsylvania : Monroe ; Pike ; Northampton ; Bucks ; Lancaster I 

 Allegheny'. 



Family 8. CALLITRICHACEAE Lindl. Water Starwort Family' 

 1. CALLITRICHE L. 



Fruit manifestly pedicelled. i. C. Auslinii. 



Fruit sessile. 

 Bracts present. 

 Styles much shorter than the fruit. 2. C. pahistris. 



Styles fully as long as the fruit. 3. C. heterophylla. 



Bracts wanting. 4. C. bifida. 



