CATALOGUE. 251 



foliage, downy when young, glossy and almost glabrous when old, and 

 persistent until the new leaves have come out; branchlets downy; leaves 

 coriaceous, l£-2£' long, 5-9" wide, on very short, downy petioles, lanceo- 

 late with a cordate or (by the two lowest teeth spreading) hastate base, 

 tapering to a sharp point, repandly spinous-dentate or rarely entire; stami- 

 nate flowers with 4-5 large anthers, pistillate ones with long, recurved styles ; 

 sessile fruit maturing in the first year; cup hemispherical, with brown, 

 triangular, obtuse, almost flat scales, and covering about £ of the oblong, 

 long-pointed nut, — Rocky Canon, Arizona, Rothrock, 1874 (287). Extends 

 through Arizona and New Mexico to Western Texas. Botanically a most 

 interesting species, as it combines many characters of the White Oaks, viz., 

 the annual maturation and especially the position of the abortive ovules at 

 the base of the nut, with characters of the Black Oaks, viz., the black bark 

 and coarse wood, the small number and large size of the stamens, the 

 long, recurved styles, and the tomentose inner coating of the shell; the 

 leaves show, as they do in many Black Oaks, a stronger reticulation on 

 the upper than on the lower side. 



Quercus hypoleuca, Engelm. I. c. p. 384 ; Q. confertifolia, Torr. Bot. 

 Mex. Bound. 207, not H. B. K. — An evergreen Black Oak, with annual 

 maturation of fruit, forming a middle-sized tree, with dark, rough bark; 

 leaves coriaceous, lanceolate or oblong-lanceolate, tapering into a short 

 petiole, 2-3£' long, £-1' wide, revolute on the margin, entire or with a few 

 broad teeth toward the tip, glabrous and shining above, white-tomentose, 

 with smoother and darker ribs below; 4 glabrous anthers in the 5-lobed 

 calyx; styles recurved; acorns sessile or short- peduncled; cup-scales ovate- 

 triangular, obtuse, bright brown. — Sanoita Valley, Southern Arizona, at 

 7,000 feet altitude, Rothrock, 1874 (653); also found on the San Francisco 

 Mountains. A very conspicuous and as yet little known species, which Dr. 

 Rothrock found 30 feet high and 1 foot in diameter. 



LORANTHACE^. 

 By Dr. George Engelmann. 



Phoradendron flavescens, Nutt. — The collection contains a number 

 of specimens, which represent two distinct forms, different from the com- 



