396 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. II 



coast of the Caribbean Sea to Miami, Florida, and central Mexico, the 

 Bahamas and Bermuda. The references to C. nutans in manuals and 

 lists of Northern American plants is plainly a misinterpretation of 

 species; C. nutans is sub-tropical and is readily differentiated from 

 C. hypericifolia by its inflorescence, being single in the axils of the upper 

 leaves instead of glomerulate as in C. HYPERICIFOLIA. Seeds brownish- 

 red, .8 x .6 mm., manifestly tetrangular, the ventral facets not ridged. 



CHAMAESYCE RAFINESQUEI (Greene) Heller in Muhlenbergia 8:48. 



1912. 



Euphorbia Rafinesquii Greene, Pittonia, 3:207. 1897. 



Euphorbia hypericifolia hirsuta Torrey Fl. N. Y. & Mid. States 331. 

 1826. 



Euphorbia hirsuta Wiegand Bot. Gaz. 24:50. 1897. non Schur. 

 nee Kit. 



The long hairs on the stems of this species immediately distinguish 

 it. It differs strongly in the involucre from its nearest cogeners in 

 having all the lobes lacerate and of equal size. The appendages are 

 transversely ovate and irregularly repand. The capsules are glabrous, 

 the cocci but slightly keeled and the seeds oblong, brown, 1.2 x .8 mm. 

 rather sharply angled upon the dorsum, the facets but slightly rugose. 

 Type locality: NEW YORK, campus of Cornell University at Ithaca, 



K. M. Wiegand. Type in herb. Cornell University. 

 Distribution: From ONTARIO southward through NEW YORK and 



southwest through OHIO, INDIANA, and ILLINOIS to ARIZONA. 



CHAMAESYCE NUTANS (Lag.) Small, Fl. SE. U. S., 712. 1903. 



Euphorbia nutans Lagasca, Gen. et Sp. Nov., 17. 1816. 



The inflorescence, solitary in the upper and middle leaf-axils, and 

 the small leaves, at once distinguishes this glabrous species from its 

 cogeners. The involucral walls show almost equal, substantially 

 3-fmgered, lobes with a similar process at the base of the sulcus. The 

 glandular appendages are very rudimentary being little more than a 

 ridge on the dorsum of the gland. The seeds are elongated-ovate, 1.3 

 x .9 mm., very dark red with an ashen covering, the transverse rugae of 

 the dorsal facets more prominent than those of C. Preslii. 

 Distribution: MEXICO, near Durango and Vera Cruz. 



Chamaesyce rubida (Greenm.) comb. nov. 



Euphoriba rubida Greenm. in Proc. Am. Acad., 39:83. 1903. 



The differentiating macroscopic characters of this species lie sub- 

 stantially in its capsules and seeds. Its affinity is between nutans Lag. 



