ADDITIONS AND CORRECTIONS. G15 



scales broadly lanceolate, acute, puberulent and greenish on tlie back, and with 

 scarious margins : pappus short, fulvous. — PI. Wright, ii. 83. 



Eastern part of San Diego and San Bernardino counties {Palmer, Pafry) ; eastward to New 

 Mexico. 



Page 343. 37\ DICORIA, Torr. & Gray. 



Head heterogamoua, discoid ; one or two marginal flowers pistillate and fertile, 

 apetalous, consisting of an ovary and a 2-parted style; the other flowers G to 12, 

 staminate and sterile, with obconical 5-toothed corolla, completely monadelphous 

 filaments, slightly coherent anthers, and undivided style destitute of stigma and 

 appendages. Involucre of about 5 short and oval herbaceous scales, and of either 

 one or two much larger and flat accrescent scarious ones, each of the latter subtend- 

 ing a fertile flower. Eeceptacle with a few delicate chaffy scales among the fertile 

 flowers. Akenes obcom pressed, oblong, surrounded by a toothed border or wing, 

 much exceeding the outer involucre. — Annual or biennial herbs, whitened with 

 appressed hirsute pubescence; with entire or serrate petioled leaves, the lowest 

 opposite, the upper alternate, and racemosely or spicately paniculate and scattered 

 small heads, nodding in fruit; the flowers greenish yellow. — Emory Eep. U.3, 

 & Bot. Mex. Bound. 8G, t. 30 ; Gray, Proc. Am. Acad. xi. 76. 



1. D. canescens, Torr. & Gray, 1. c. A foot to a yard high : leaves from 

 oblong-lanceolate to ovate : internal and greenish-yellow scales of the involucre a 

 pair, orbicular, in fruit 3 lines long, longer and broader than the broadly and veiny- 

 winged akenes they subtend. 



Desert washes in San Bernardino Co. {Parry), and eastward in S. Utah and Arizona. 



D. Brandegei, Gray, 1. c, of S. E. Colorado, has narrow leaves, and a single fertile flower, tlio 

 akene of which has a callous-toothed border in phice of wing, and much exceeds the relatively 

 smaller subtending scale. 



rage 343. 38. IV A. 



2. I. Hayesiana, Gray. Apparently herbaceous from a woody base, and from 

 1 to 3 feet high, erect, and the larger plants paniculately much branched : caulino 

 leaves opposite, spatulate-oblong and very obtuse, an inch or two long, the base nar- 

 rowed into a distinct petiole ; those of the branches alternate and gradually passing 

 into linear bracts, the uppermost hardly surpassing the heads ; these rather crowded 

 in panicled spikes : involucre of about o rounded and completely distinct imbricated 

 scales. — Proc. Am. Acad. xi. 78. 



San Diego Co. ; near Warner's Pass {Sutton Hayes, 1858), collected in October, when all the 

 flowers had fallen ; Jamuel Valley, south of Sau Diego, Dr. Pahncr, 1875. 



Page 344. 41. PRANSERIA. 



3. F. pumila, Nutt. Common in the streets of San Diego, Parri/, Cleveland. 

 The fruit is small, and much of it one-celled and spineless, and therefore that of an 

 Ambrosia. The species needs to be compared with A. tenuifoUa, Spreng., and A. 

 fruticosa, DC., var. canescens. 



10. F. ilicifolia, Gray. Shrubby, much branched ; branches very leafy, hirsute 

 and pubescent : leaves closely sessile by an auriculate half-clasping base, coriaceous, 

 iirominently veiny and reticulated, ovate or oblong (less than 2 inches long), sca- 

 brous and pubescent, coarsely serrate ; the teeth and especially the acuminate apex 

 spiny-tipped: fertile involucre globose, thickly armed with hook-tipped prickles, 



