76 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Herbarium, here alluded to, represents a part of the type of S. quadran- 

 gulatum, Klatt, as it answers perfectly to the description. With it, 

 moreover, Mr. Pringle's specimens are an excellent match. The species 

 seems well characterized by the linear grass-like leaves, and the pyri- 

 form glabrous fruit, fully twice longer than in S. angusti folium, Mill., 

 and its related forms. 



Sisyrixchium tenuifolium, Humb. & Bonpl., var. Seatoni. Stems 

 about 1 dm. high, much-branched, glabrous : leaves equalling or exceed- 

 ing the inflorescence, slender, subfiliform : capsule pubescent. — Mexico. 

 State of Vera Cruz: Mt. Orizaba, altitude 2770 m., 9 August, 1891, 

 Henry E. Seaton, no. 483 (hb. Gr.). State of Puebla : hillsides above 

 Chalchicomula, altitude 2615 m., 27 July, 1901, C. G. Pringle, no. 9533 

 (hb. Gr.). 



The variety Seatoni differs from the species chiefly in the lower 

 stature, and in the filiform character of the leaves. 



Habenaria oreophila. Glabrous throughout: stem erect, leafy, 

 7 to 8 dm. high: leaves oblong-lanceolate, 1 to 1.5 dm. long, 3 to 3.5 cm. 

 broad, apiculate-acute, entire, membranous ; the lowermost leaves re- 

 duced to mere sheaths, the uppermost gradually smaller : inflorescence 

 a terminal elongated loose 2 to 3 dm. long raceme ; bracts subfolia- 

 ceous, lanceolate-acuminate, about equalling the ovary : upper sepal 

 ovate, cucullate, 8 mm. long, 3-nerved ; lateral sepals oblong-lanceolate, 

 slightly oblique, obtuse, 3-nerved : lateral petals deeply 2-parted ; the 

 upper division lanceolate, upwardly arched, shorter than and coherent 

 with the upper sepal ; lower division bent downward, linear-attenuate 

 and somewhat coiled at the tip : labellum deeply 3-parted ; the middle 

 lobe ligulate, slightly thickened, 11 to 13 mm. long, obtuse; lateral 

 divisions linear-attenuate, 2.5 cm. long, more or less spirally coiled at 

 the free ends : spur clavate, free, 4 to 4.5 cm. long : column bearing 

 fleshy oblong appendages at the base : ovary narrowly winged. — 

 Mexico. State of Guerrero : mountains near Iguala, 15 September, 

 1900, C. G. Pringle, no. 9248 (hb. Gr.). 



The affinity of this species is with Habenaria jaliscana, Watson, and 

 H. leuccecapensis, Fernald. From the former it is readily distinguished 

 by the height, the longer leaves, the longer spur, and by the entire 

 absence of the falcate character of the lateral divisions of the labellum ; 

 and from the latter it differs in having much longer and narrower leaves. 



Corallorhiza involuta, Greenm., Proc. Am. Acad, xxxiii. 474. 

 Specimens secured by Mr. C. G. Pringle on hills near Amozoc, State 

 of Puebla, Mexico, at an altitude of 2600 m., 10 September, 1901, 



