G46 



Callitrichaceae 



Callitriche 



50 



Map 1341 



Euphorbia Cyparissias L. 



~"58 



Map 1342 



Euphorbia Peplus L 



stock will not eat it. If a colony of this pest is discovered no amount of 

 effort or expense should be spared in order to exterminate it. 

 Nat. of Eu. ; Maine, Ont. to Mich., southw. to N. J. and Ind. 



14. Euphorbia Cyparissias L. (Tithy mains Cyparissias (L.) Hill.) 

 Cypress Spurge. Map 1341. Found in all parts of the state where it has 

 escaped from cultivation and persisted. 



It rarely produces seeds and there are no records of its doing so in 

 Indiana. It should be closely observed and if found with mature seed the 

 fact should be recorded. 



Nat. of Eu. ; Mass. to Colo., southw. to Va. 



15. Euphorbia Peplus L. (Tithymalus Peplus (L.) Hill.) Map 1342. 

 I have specimens of this species only from Wells County where it is well 

 established in north Bluffton. It was reported also by Dr. Clapp from the 

 vicinity of New Albany, Floyd County. 



Nat. of Eu. ; N. B. to w. N. Y., Wis. to Iowa, southw. to N. J., W. Va., 

 and Ala. 



16. Euphorbia commutata Engelm. (Tithymalus commutatus (En- 

 gelm.) Kl. & Garcke.) Map 1343. Infrequent on rocky or gravelly wooded 

 slopes, mostly along streams and about lakes, sometimes in the talus of 

 cliffs and rarely in the open, if so, usually about gravel pits. 



Pa., Ont. to Minn., southw. to Fla. and Mo. 



148. CALLITRICHACEAE L. Water Starwort Family 



4530. CALLITRICHE L. 



Plants terrestrial ; fruit on a peduncle usually a fourth to three fourths its length, 

 wider than long, deeply notched at the apex and base, lobes with a deep margin 

 between them; stigmas about as long as the fruit, recurving 1. C. Austini. 



Plants amphibious or submerged; fruit sessile, as long as or longer than wide, with a 

 shallow notch at the apex; stigmas erect or spreading. 



