Lizard's. tail. 



Hornwort. 



Water-Star- 

 wort. 



Water-Star- 

 ■wort. 



River-weed. 



MICHIGAN FLORA. 



SAURURACEiE. 



(Lizard'' s-tail Fam ihj.) 



67 



SAURURUS 



963. cernuus, L. (***) 



Swamps. 



Shore Spurge. 



Spotted 

 Spurge. 



Flowering 

 Spurge. 



0. & s. 



Common. 



CERATOPHYLLACEzE. 



(Hornwort Family.) 

 CERATOPHYLLUM 



964. demersum, L. Th. 



Ponds. Fruit in August. Common. 



CALLITRICHACE/E. 

 ( Water-Stanvort Fam ihj . ) 

 CALLITRICHE 



965. verna, L. (***) Th. 



Ponds. Macomb Co., to Lake Superior. 



966. autumualis, L. 



Rivers. Flint— Dr. Daniel Clark; to Lake Superior-Gray. 



PODOSTEMACEiE. 

 (River-weed Family?) 

 PODOSTEMON 



967. ceratophyllus, Michx. 



Dr. A. B. Lyons. 



EUPHORBIACE^E. 



(Spurge Family.) 



EUPHORBIA 



968. polygonifolia, L. Th. 



Sandy shores of the Great Lakes. S. Haven — Bailey; Ft. Gratiot— 

 Winch. Cat., etc. Frequent. 



969. maculata, L. (***) 



Roadsides and fields, everywhere. One of the few northern plants, 

 observed by Prof. A. N. Prentiss in Brazil. 



970. hypericifolia, L. (***) C. & S. 



Cultivated soil, and waste places. Detroit— Dr. A. B. Lyons; Ionia (!); 

 Grand Rapids (!); Lansing— Bailey. Infrequent. 



971. corollata, L. (**) C. & 8. 



Sandy soil. A weed difficult to eradicate on account of its deep roots. 

 Beginning to be cultivated by gardeners for its abundant, small, white 

 flowers. Its milky juice is acrid-poisonous. 



972. platyphylla, L. 



Macomb Co.; "Along the Great Lakes."— Gray. 



973. Helioscopia, L. (***) 



Common at Detroit.— Dr. A. B. Lyons. 



974. commutata, Engelm. 



Ann Arbor.— Winch. Cat. ; Flint. 



