ADDENDA. 



Page 142, next after R. ABORTIVUS, insert, 



R. RHOMBOIDEUS. Goldie. 



Hirsutely pubescent ; st. much branched from the base ; rod. Ivs. entire 

 rhomboid-ovate, crenate-dentate, on long petioles, cauline Ivs. palmate, flora* 

 deeply laciniate ; sep. spreading ; hds. of carpels (large) globose ; ach. smooth, 

 with very short beaks. Wise. Lapham! and Can. W. A low, bushy, hairy 

 species, 6 10' high. Root leaves about 1' by ', often roundish or elliptical, 

 the petioles about 2' long. Segments of the stem leaves linear-oblong, obtuse 

 oftener entire. Petals yellow, oblong-obovate, exceeding the calyx. 



Page 166, next after A. L-KVIGATA, insert, 

 ARABIS PATENS. Sullivant. 



Erect, everywhere clothed with rigid, simple or forked hairs ; radical In-. 

 rosulate, petiolate, middle ones oblong-ovate, coarsely dentate, auriculate-am- 

 plexicaul, upper ones linear-oblong, subentire ; pedicels longer than the rathei 

 large white flowers; siliques spreading and curved upwards, beaked with the 

 conspicuous style. Rocky banks of the Scioto river, Columbus, O., Sullivant. 



Page 378, next after P. ROTUNDIFOLIA, insert, 



PYROLA ULIGINOSA. Torr. & Gray. 



Lvs. nearly round, sometimes inclining to ovate, coriaceous, longer than 

 the petiole, decurrent, with a few prominent veins; scape somewhat angular, 

 with lanceolate bracts ; rac. 8 12-flowered ; cal. i the length of (he petals ; pel. 

 ovate-oblong; stam. ascending; fil. smooth; ova. depressed; sty. declined, cla- 

 vate. Sphagnous swamps, Galen, N. Y., Sartwell. Scape 4 8' high, many- 

 flowered. Petals reddish-purple. Stigma toothed. June. (Dr. Sari, comm.) 



Page 397, next after V. (VERBASCUM) LYCHNITIS, insert, 

 ft. hylrida. St. simple, erect, tomentose ; Ivs. ovate-oblong, subcordate, woolly 

 on both surfaces; fls. in a terminal, somewhat leafy spike, yellow. Rome, 

 N. Y., Vasey. Apparently a hybrid between V. lychnitis and V. Thapsus. 



Page 420, next after P. PILOSUM, insert, 



PYCNANTHEMUM TORREYI. Benth. 



St. pubescent, slender, moderately branched ; Ivs. linear-lanceolate, smooth - 

 ish, acute, denticulate, margin ciliate, under surface downy; cymose heads con- 

 tracted hemispherical ; cal. with lanceolate acuminate teeth with bristly hairs 

 at the summit; slam, exserted. York Island, Carey. Stem purplish, strict. 

 about 2f high. Leaves 2 3' by 4". Corolla two-lipped, white. Ovary naked 

 at the summit. Aug. (Dr. Sarlivell comm.) 



Page 474, next after P. MITE, insert, 



POLYGONUM CARKYI. Olney. 



Si. erect, hirsute, much branched; Ivs. lanceolate, with scattered and ap- 

 pressed hairs; slip, scarious, tubular, truncate, hairy ; spi&es axillary and ter- 

 minal, on very long, nodding peduncles, thickly beset with glandular hairs ; 

 slam, shorter than perianth: sty. 2; ach. orbicular-ovate, mucronate. Swamps ; 

 N. H. ! to R. I. Olney. Plant 3 5f high. Leaves 36' by 1', midveiu 

 and margins hairy. Calyx greenish-purple tinged with white, small. Resem- 

 bles P. Pennsylvanicum. Jl. 



