288 Karl M. Wiegand and Arthur J. Eames 



Confined entirely to the region about Ithaca and the shore of Cayuga Lake. 

 There are no records from the surrounding towns back from the lake. 



N. S. to Minn., southw. to Fla. and Tex. ; common on the Coastal Plain. 



2. Euphorbia L. 



a. Flowers axillary ; leaves opposite, serrate ; glands 4, appendaged. 



b. Stems ascending or erect, nearly smooth ; leaves 1.5-3.5 cm. long, with a 

 purple spot; capsule broadly ovate, sharply angled, smooth; seeds ash color. 



1. E. nutans 

 b. Stems more prostrate, hairy ; leaves 1.5 cm. long or less. 

 c. Stems reddish or greenish, hirsute ; leaves bright green ; capsule oval, refuse, 



bluntly angled, smooth; seeds ash color. 2. E. hirsuta 



c. Stems flesh color, more crisp-puberulent ; leaves dull, often with a purple 

 spot; capsule ovate, acutely angled, hairy; seeds reddish flesh-color. 



3. E. maculata 



a. Flowers in terminal, simple or compound, umbels, or the inflorescence dichoto- 

 mousj lower leaves all alternate, serrate or entire. 

 b. Appendages of the glands large, showy, white; leaves entire, linear-elliptic. 



4. E. corollata 

 b. Appendages wanting ; leaves linear or obovate. 



c. Glands orbicular ; leaves obovate, serrate ; seeds sculptured ; annuals. 



5. E. Helioscopia 

 c. Glands crescent-shaped ; leaves entire. 



d. Leaves obovate ; seeds sculptured ; annuals. 6. E. Peplus 



d. Leaves linear to oblong; seeds smooth; perennials. 



e. Primary bracts 13-20 mm. wide ; leaves 4-25 mm. wide ; glands horned. 

 /. Leaves 18-25 mm. wide, bright green ; pods wrinkled. 



7. E. lucida 



f. Leaves 4-9 mm. wide, glaucous ; pods minutely granular or smooth. 



8. E. Esula 



e. Primary bracts 4-7 mm. wide ; leaves 1-2 mm. wide ; glands scarcely 

 horned ; pods minutely granular. 9. E. Cyparissias 



1. E. nutans Lag. (£. Preslii of manuals. E. hypericifolia, in part, of Cayuga Fl.) 



Spurge. 



A weed on open dry gravel or cinder banks, and in waste places; frequent. 

 July-Sept. 



Found especially on railroad embankments ; rarely elsewhere in the basin. Con- 

 sidered native, but possibly introduced from farther south. 



Mass. to Ont. and Wis., southw. to Fla., Nebr., and Mex. ; infrequent on the Coastal 

 Plain. 



Dr. B. L. Robinson (see Gray Herb. Exsic, no. 229) has noted the verification 

 of the identity of E. nutans Lag. and E. Preslii Guss. The former is the older 

 name. 



2. E. hirsuta (Torr.) Wiegand. (E. hypericifolia, in part, of Cayuga Fl. E. 



Rafinesqui Greene.) Hairy Spurge. 



In situations similar to the preceding, also in roadside gutters ; common. July- 

 Sept. 



E. Que. to w. Ont., southw. to N. J., Pa., Ohio, and 111.; infrequent on the Coastal 

 Plain. 



When attacked by the rust fungus, Aecidium Euphorbiae Gmel., the plant grows 

 stiffly erect. This Euphorbia is not clearly E. vermiadata Raf., though House (Bui. 

 N. Y. State Mus. 254, 1924) considers the two synonymous. 



