372 FIELD COLUMBIAN MUSEUM BOTANY, VOL. i. 



EUPHORBIA ARMOURII Millsp. Field Col. Mus., Bot., i., 28. 



"Herb 18 inches high, uncommon, found only at the mouths 

 of caves, and in very damp, shady places near Izamal, Novem- 

 ber" (975)- Of larger growth, and with young parts more 

 densely hirtellate than in the type. Merida, Cenote" Oambula, 

 Dec. 14, 1864; Quinta del Obispo, Nov. 22, 1864 (Schott, 76). 



EUPHORBIA BUXIFOLIA Lam. Encyc., ii., 421. 



Seaside at Progreso, April 4, 1865 (Schott, jo8). 



Euphorbia dentata Michx. Fl. Bor. Am., ii., 211. 



Merida, at Quinta del Obispo, Nov. 23, 1864 (Schott, 75). 



Euphorbia Gaumerii sp. nov. Sacio. 



Caule glabrae, lignosae, scandenti, ternatim ramoso, ad articu- 

 lationes incrassata, ramis longe articulatis plus minusive pilis 

 strigosis sparsis, foliis oppositis ovato-lanceolatis obtusis vel 

 acutis e basi cuneata, petioii quaterne longiori, glandulis stipul- 

 aribus brevis, cymis ad articulationes ramularum corymboso- 

 paniculatis, polycephalis, ad apice racemoso-paniculatis, tota 

 laxiuscule, pedunculatis divaricatim dichotomis ; foliis floralibus 

 rarius minimis ovato-lanceolatis, involucris pedicillatis turbin- 

 atis adpresse lanatis, lobis spathulatis irreguliter dentato-fim- 

 briatis, glandulis transverse sub-plicatis appendice triple latiori 

 orbiculata minute serrato-dentata, stylis brevibus, stigmatis 

 crassis profunde bi-partitis. Capsula (juniori) glabra, profunde 



sulcata, coccis obtuse carinatis, semina Frutex 



scandentis 10 pedalis. Folia 1-2 poll, longa, 9-12 lin. lata, 

 cymse laxiuscule oppositae. Involucris lin. longa, duo-lineam lata. 

 Species, prox. colletioidea Bth. (alectoroctonum). In sylvis ad 

 Buena Vista Xbac (1073). 



Euphorbia graminea virgata var. nov. Onob kax. 



"Herb 2 feet high, common in moist places near Tekax, 

 September" (1128). 



Differs from the species in having longer and virgate branches, 

 larger leaves, smaller involucral lobes, broader and blunt pointed 

 appendages having a tendency to trilobation, and smaller seeds 

 with fewer scrobiculae arranged in two transverse lines, sharper 

 rugae, a sharper triangular apex, and no median line. 



Euphorbia graminea lancifolia var. nov. 



'" Herb 18 inches high, rare, railroad bank, northwest of Izamal, 

 November " (969). 



Branches less quadrangular and not hairy on the angles, lower 

 ovate leaves repand dentate, upper leaves lanceolate, the floral 

 linear on attenuate branchlets. Glandular appendages ovate, 

 seeds longer and more sharply quadrangular than in var. virgata, 

 and with three lines of pits. 



