OP ARTS AND SCIENCES. 283 



named at a venture, simply because they do not agree with the de- 

 scriptions of M. myurus, upon the double chance of their being identical 

 with Ilartweg's plant and its yet proving to be a good species. 



Habenaria Schaffneri. Stem stout, 8 inches high, covered with 

 imbricated ovate or ovate-lanceolate sheathing, acute or acuminate 

 leaves 1 to 1 h inches long : bracts large, tbliaceous, much exceeding 

 the ovary ; raceme short, few- (6-8-) flowered : flowers large, 5 or 6 

 lines long ; lower sepals lanceolate, acutish, the upper broadly ellipti- 

 cal, obtuse, carinate; petals 2-parted, the lower segments very narrow, 

 the upper oblong-falcate, contiguous or subcoherent to the sepal ; lip 

 3-lobed above the base, 5 lines long, the middle lobe narrowly ligulate, 

 the lateral narrowly linear ; spur an inch long or more, dilated toward 

 the end and very acuminate: oblong processes of the stigma and beaks 

 of the anther 1^ lines long. — In the San Miguelito Mountains (5088 

 Schaffher, 1876) and near San Luis Potosi (860 Parry and Palmer, 

 1878) ; under pines in the Sierra Madre, Chihuahua (1375 a Pringle, 

 Sept., 1887). 



Calochortus Madrensis. Bulb small, fibrous-coated ; stem very 

 slender, a span high or less, not bulbiferous : leaves narrowly linear, 

 equalling or shorter than the stem : flowers small, erect, orange- 

 yellow ; sepals oblong, obtuse, apiculate, 6 lines long, naked and 

 spotless ; petals as long, cuneate-obovate, rounded above or barely 

 acutish, entire or denticulate, with a band of orange-colored hairs 

 above the base, the nectary ill-defined or obsolete : anthers a line long, 

 obtuse: capsule linear, 1 to If inches long. — On pine plains at the 

 base of the Sierra Madre, Chihuahua ; C. G. Pringle (n. 1882), 

 Sept., 1887. 



Eriocaulon Pringlei. Annual, very low and delicate : leaves 

 filiform, terete or semiterete, nerveless, 9 lines long or less : scapes 

 very slender, \\ inches long or less, with loose pellucid nerveless 

 sheaths : heads small (less than a line broad) and few-flowered, fuli- 

 ginous, glabrous ; bracts erect, obtuse, the inner narrow and acute : 

 flowers trimerous. — On plains at the base of the Sierra Madre, Chi- 

 huahua ; C. G. Pringle (n. 1533), Sept., 1887. 



3. Descriptions of some Plants of Guatemala. 



LOUTERIDIUM; new genus of Acanthacece, tribe Ruelliece. Calyx 

 herbaceous, the upper sepals distinct, the 3 lower united to the apex, 

 these 3 divisions nearly equal, acute. Corolla-tube very short, ab- 



