36 PROCEEDINGS OF THE AMERICAN ACADEMY. 



altitude about 10,000 feet, August, 1894, nos. 5614, 5614 a, and by E. 

 W. Nelson, in the same localit}^ no. 1140. 



Microstylis streptopetala. Slender, 6 to 18 inches high, 1- 

 leaved : bulb oval, half inch in diameter ; sheaths 2, closely surrounding 

 the base of the stem, obtuse : leaf elliptic-oblong, cuneate at the amplexi- 

 caul base, acutish or obtuse at the apex, 1^ to 3 inches long, 4 to 8 lines 

 broad : naked and angled peduncle about equalling the stem (2 to 4 

 inches in length) : spicate inflorescence strict, slender, 2 to 8 inches long, 

 2 to 3 lines in thickness, very densely flowered above but looser below : 

 bracts very short ovate-deltoid, obtusish : flowers sessile : sejials o-nerved, 

 green, oblong, obtuse, the upper somewhat falcately incurved, Ih lines 

 long, green; lower 2 lines long: lateral petals linear, spirally coiled or 

 twisted, greenish white ; labellum deltoid, strongly auriculate, minutely 

 3-toothed at the apex, half as long as the upper sepals, in dried state 

 nearly black ; margins somewhat thickened and slightly incurved ; auricles 

 oblong and obtuse. — Collected in flower by C. G. Pringle on dry pine 

 ridges, Sierra de San Felipe, Oaxaca, at 9,000 to 10,000 feet altitude, 

 30 July, 1894, no. 4808. Most nearly related to 31. montana, Roth, but 

 with very different lip. 



Phoradendron Forestierse. Glabrous throughout : branches 

 terete, olive-green ; branchlets ancipital : leaves narrowly oblong, with 

 rounded apex and cuneately naiTowed base, sessile, 1-nerved, or very 

 obscurely 3-nerved, yellowish green, inch to inch and a half long, IJ- to 

 2i lines wide : inflorescences of 9 plant axillary, solitary, opposite, 

 moniliform, 5 to 9 lines in length, flowers in 1 to 4 globular 10-12- 

 flowered clusters, becoming deeply imbedded in the substance of the 

 nodular rhachis ; the clusters 2i^ lines in diameter, tawny in color ; 

 the intervening necks 1 to 1^ lines long, about half enveloped in a loose 

 sheath ; the margins of the sockets holding the flowers finely ciliolate : 

 divisions of the perianth 3 (rarely 4), deltoid, the free portion not a 

 third of a line in length. — Collected by C. G. Pringle on hills between 

 Tehuacan and Esperanza, Puebla, altitude 6,000 feet, 23 December, 

 1895, no. 6290. A species parasitic on Forestiera, and apparently most 

 nearly related to P. brachystachynm, Oliv., which, however, is tomen- 

 tulose on the branchlets, has simple not moniliform inflorescences, and 

 larger more distinctly veined leaves. 



Euphorbia Lnciismithii. Tall branching tomentulose glaucous 

 shrub, 10 to 15 feet in height: branches subterete, striate: leaves verti- 

 cillate, 2-5-nate, elliptical, obtuse at both ends or subacute at the base, 

 glabrous or glabrate above, paler and soft grayish-tomentulose beneath, 



