April, 1916. EuPHORBiACEiE — Millspaugh 413 



Eiunecanthus Armourii. 



Euphorbia Armourii Millsp. Field Mus. Bot. 1:28. 1895. 



The range of this species is Cozumel Island and the main land of 

 Yucatan from Merida to Izamal, San Anselmo, Chichan Itza and Buena 

 Vista Xbac. Schoti 76; Millspaugh 108, ijdg, 1570; Gamner Q75, 1821; 

 Seler 3927, 4012; Goldman 536. 



Eumecanthus astroites (Fisch. & Mey.). 



Euphorbia astroites F. & Mey. Anim. Ind. Sem. Petrop. 1845, 

 Ann. Soc. Nat. ser. 3, 5:371. 



Euphorbia astroites heterappendiculata Millsp. Field Mus. Bot. i :28. 

 1895. 



The range of this species is: Mexico at Tampocoala, Karwinsky; 

 Izamal, Millspaugh 64, Gaumer 521; and Guatemala, Kellerman 8038. 



Eumecanthus gramineus (Jacq.) comb. nov. 



Euphorbia graminea Jacq. Stirp. Amer. 151. 1763. 



This species has a broad distribution from Chihuahua, Mexico, 

 southward to U. S. Colombia and Ecuador. In Yucatan it has been re- 

 ttmied from Calotmul, Izamal, Tekax, Temax, Yaxcab and Chichan- 

 kanab. 



Eumecanthus xbacensis. 



Euphorbia xbacensis Millsp. Field Mus. Bot. 1:374. 1898. 



Only known from the type station, Buena Vista Xbac, Yucatan, 

 Gaumer 1108, "rare." 



The other North American species are: 

 Eumecanthus ariensis (Kth.) Kl. & Gke. Tricocc. 42. 1859. 



Euphorbia ariensis Kunth. HBK. Nov. Gen. 2:46. 181 7, 



Eumecanthus Benthamianus Kl. & Gke. idem. 



Eumecanthus adiantoides (Lam.) 



Euphorbia adiantoides Lam. Encyc, 2:422. 

 Leptopus Hartwegii Kl. & Gke. Tricocc. 46. 



Eumecanthus Bamesii 



Adenopetalum Bamesii Millsp. Field Mus. Bot. 2:377. 



Eumecanthus bifiurcatus (Engelm.) 



Euphorbia bifurcata Engelm. Mex. Bound. 2:190. 



Eumecanthus boerhaavifolius (Boiss.) 



Euphorbia boerhaavifolia Boiss. DC. Prodr. 15:54. 



Eimaecanthus bracteatus (Kl. & Gke.) 



Adenopetalum bracteatum Kl. & Gke. Tricocc. 48. 

 Euphorbia scabrella Boiss. DC. Prodr. 15:55. 



