476 PROCEEDINGS OF THE AMERICAN ACADEMY, 



Epidendrdm elegans, Rchb. f. in Walp. Ann. vi. Sli. Barkeria 

 elegans, Kuowles & Wescott, Fl. Cab. ii. 7, t. 49. This rare and beauti- 

 ful orchid has been rediscovered by Mr. Pringle on limestone ledges near 

 Tehuacan, altitude 1540 m., 31 July, 1897, no. 6/G9. 



The species is readily recognized by its upright leafy stem, terminal 

 racemose inflorescence, long bracteate-sheathed peduncle, and finally by 

 the beautiful lilac-purple flowers (3-5 cm. broad), and the oblong usually 

 undivided lip, which is adnate to the base of the column for one fourth 

 the length of the latter organ. 



Celtis monoica, Hemsl. Biol. Cent.-Am. Bot. iii. 139, v. t. 77. 

 Excellent fruiting specimens of this species were collected by Mr. E. W. 

 Nelson on Maria Madre Island of the Tres Marias group of islands, 3-25 

 May, 1897, no. 4236. The leaves in Mr. Nelson's specimens are more 

 distinctly serrate than in the type, but they have exactly the same out- 

 line, venation, and pubescence. The following description of the fruiting 

 characters may be appended : — pedicels axillary, solitary, ascending or 

 erect, 1 cm. or less in length, appressed-puberulent : mature fruit oblong- 

 ovate, 10 to 12 mm. long, G to 8 mm. thick, subtriangular, glabrous : the 

 undivided styles persistent. 



The above species is readily recognized on account of the distinctly 

 pinnate venation of the leaves, while in most of the species of the genus 

 the leaves are 3-nerved from the base. 



Pouzolzia Pringlei. Shrub: stems and branches covered with a 

 grayish brown bark, dotted with scattered lenticels ; the branchlets pubes- 

 cent : leaves oblong-ovate or elliptic-ovate, 1.5 to 4 cm. long, 10 to 18 

 mm. broad, obtuse or acute, entire, ciliate, 3-Derved from the cuueate or 

 rounded base, pubescent above, densely white-tomeutose beneath ; petioles 

 pubescent, 3 to 10 mm. long; stipules triangular-acuminate, about 3 mm, 

 long, ciliate, 1-nerved, pubescent on the outer or lower surface: flowers 

 monoecious, disposed in dense axillary clusters : staminate flowers, 3-4- 

 merous : the short bidentate perianth of the fertile flowers much exceeded 

 by the long prominent style ; fruiting perianth ovate, short-acuminate, 

 about 2 mm. long, pubescent, somewhat tuberculate-winged, completely 

 enclosing the ovate acute smooth white shining akene. — Collected by 

 C. G. Pringle in Tomellin Canon, altitude 1230 m., 9 July, 1897, no. 

 6730. 



A species somewhat resembling P. nivea, Watson, but with oblong 

 leaves and shorter stipules. 



Ruprechtia Pringlei. Shrub or small tree 4 to 6 m. high : stems 

 and branches terete, smooth, covered with a grayish bark ; leaves oblong- 



