374 FIELD COLUMBIAN MUSEUM BOTANY, VOL. i. 



Euphorbia pulcherrima (Grab.) Willd. Allg. Gart. ii., 27. 

 Merida, at Quinta del Obispo, Jau'y, 1866 (Schott, 727). 



EUPHORBIA RHYTISPERMA Engelm in Kl. et Gke., p. 34. 



"Waste grounds at Tekax, September" (1123). Larger and 

 fuller growth than specimens collected at Izamal in 1895. 



EUPHORBIA SERPYLLIFOLIA Pers. Ench. bot., u, 14. 



Intermixed with E. pilulifera procumbens collected by Schott, 

 967, at Merida, 1865. 



Euphorbia Xbacensis sp. nov. 



Glabra, caule erectis, quadrangulatis dichotomis, foliis petio- 

 latis integris ovato-lanceolatis acutis e basi cuneata, summis 

 minute hirtis diminutis lanceolatis, involucris minimis extus 

 adpresse hirtis, lobis quadratis fimbriatis, glandulis 4, transverse 

 avatis, appendice angustissime orbiculatis, margine integris vel 

 obsolete lobulatis, stylis profunde bipartitis apice crassis; cap- 

 sulae hirtis profunde sulcatis, coccae obtuse carinatis, semina 

 grisea, ovate, reguliter foveolate albo in profundis. Bipedalis. 

 Folia inferiora nulla, media semipollicafia longa, bilinea lata, 

 supra minima. 



Cyttarospermum prox. E. Acerensce. Kara ad Buena Vista 

 Xbac (1108). 



Gymnanthes lucida Sw. Prod. Veg. Ind. Occ., 96. 



Merida, -April 2, 1865 (Schott, 283, ji6, in Herb. U. S. Natl. 

 Mus.). 



Hura polyandra Baill. Etud. gen. Euph., 543. Jabilla. 



A small tree 40 feet high, common at Progreso (1144). 



JATROPHA CURCAS Linn. Sp. PI., 1429. Xcacal che. 



Merida, May 28, 1865 (Schott, 395}. 



JATROPHA URENS Linn. Sp. PL, 1429. Chaya. 



Cercanias, Merida, April 30, 1865, and November (Schott, 

 496, 700}. 



JATROPHA URENS STIMULOSA (Michx.) Mull, de C. Prod., xv. , 1101. Xoat. 

 Merida, Nov. 5, 1865 (Schott, 700). Merida, in mimosetis et 

 cercanias, April 12, 1865 (Sc'hott, 496]. " Herb 6 feet high. Com- 

 mon everywhere. Buena Vista Xbac, April " (1069). "The sting 

 causes pain instead of burning or itching." Tunkas common, 4 

 feet high, March 3, 1890 (Stone, 232, in Herb. Acad. and Sci. 

 Phila.). 



Mauihot Carthaginensis (Jacq.) Muell. D. C. Prod., xv., 1073. 



Xhac che. 



"Herb 8 feet high, common along roads, and on waste lands, 

 near Izamal" (1142). Leaflets nearly panduriform, strongly 

 apiculate. Merida, June 25, 1865 (Schott, 518). The same pan- 

 duriform lobed form. 



