244 PROCEEDINGS OF THE AMERICAN ACADEMY. 



dalgo : barranca below Trinidad Iron Works, altitude 1525 m., 13 July, 

 1904, C. G. Pringle, no. 8932 (hb. Gr.). 



The glabrous character of the plant, with the smooth shining upper 

 surface of the leaves, the gracefully recurved racemes and the bicolorous 

 corollas, render this species of easy recognition, and readily separated 

 from all known species of the genus. Its affinity, however, is apparently 

 with the little known C. lucidum, Schlecht. & Cham. 



Cedronella Wrightii, n. sp. An herbaceous perennial : stem 

 erect, 5 dm. or more high, densely short-pubescent : leaves petiolate, 

 ovate to ovate-lanceolate, 1 to 5 cm. long, 0.5 to 3 cm. broad, obtuse or 

 acute, more or less irregularly crenate-dentate, closely puberulent on 

 both surfaces and somewhat canescent beneath : inflorescence an elon- 

 gated verticillate spike ; the lower verticillasters becoming remote and 

 subtended by foliar bracts, short-pedunculate : flowers small, 6 to 7 mm. 

 long in anthesis : calyx short-tubular, subbilabiate, pubescent especially 

 on the tube; calyx teeth narrowly lanceolate or lance-linear, whitish 

 or tinged with purple, the three upper teeth nearly or quite as long as 

 the tube of the calyx, the two lower teeth about two-thirds as long as 

 the upper: corolla about one-third longer than the calyx, purplish in 

 fresh specimens, becoming more or less faded in the dried state : stamens 

 slightly exserted : nutlets smooth, subtriangular in cross section with con- 

 vex back, about 1 mm. long. — C. pallida, Torr. var. Bot. Mex. Bound. 

 133 (1859), in part, as to pi. Wright, no. 1534. C. mexicana, var. 

 cana, Gray, forma, Syn. Fl. 1, pt. 2, 377 (1886). Hi/ptis spicata, Torr. 

 1. c. 129. — Mexico. State of Sonora: mountains near Sta. Cruz, 

 Wright, no. 1534 (hb. Gr.) ; San Bernardino, Tkurber, no. 780 (hb. Gr.). 

 United States. Arizona: Blue River, 8 September, 1902, Dr. A. 

 Davidson, no. 840 (hb. Gr.). 



The species here proposed has been much confused hitherto, as the 

 literature cited would indicate. Dr. Gray, in his treatment of the genus 

 Cedronella for the Synoptical Flora, finally passed Wright's specimen 

 above cited as a small flowered form of O. mexicana, var. cana, with the 

 comment " fl. not well developed." More material is now at hand, and 

 careful dissections and comparisons of the Wright, Thurber, and David- 

 son plants show the flowers of each to be perfectly normal, and many, 

 too, are fully developed. These collections evidently represent one and 

 the same species, differing from all other known American species except 

 C. micrantha in the size of the flowers and deeply toothed calyx. C. 

 Wrightii is distinguished from C. micrantha in having a longer more 

 interrupted verticillate spike, longer calyx-teeth, and in the character of 

 the pubescence. 



