CORRECTIONS. 
P:i<?(! 8. Uiulov TiANi xcn.rs Diiirr vTrs, for "Mt. Tobiii " read '• 1 lavallali." 
Pa^c 0. Uiuler Kanuxcuta'S oUTiioitiiYNciirs, for ((iii(inii><, (iiay," read "ii. adonma, Gray, Proc. 
rhil. Acad., Mar. 1863, jj. 56, {R. ama)iti><, (Iray, SiU. Jour., n. s., 33. 12.") 
Page 4.5. For "Bergia Amkiucaxa" read "Beugia TeXjVNA." 
Page 48. Under Spili;i:a[,( i:\ E.mouyi, for " S. aiiijitxtifoJia, Bentb." read " S. anguslifoUa, Spacli." 
Pago 48. For "SiOAixio v a< " read " Sph.eraloea acerifolia." 
Page 72. Under AsTiiA(i ai.cs Ui aiiknsis, for " 6,000 feet" read "8,000 feet."' 
Page 115. In note, for " Seeds brown or blaek " read " Seeds yellowisb-browii or sometimes black." 
Page IIG. Under Echixocactus Wiihtlei, for "the npi)er much longer" read "the ui)per one 
nmch longer," and. in note, for " Seeds brown or black" read " Seeds black or, rarely, brown." 
Page 117. In note, omit "lateral" after "Uowers." 
Pai;e 118. Under Oi'UNTiA spit-ER<mai!I'A, for "Utah" read "Nev.ada." In note, for " rather large 
llowcrs ■■ read "mostly large llowers." 
Page 119. Under Ori xriA i.inxAci. \, brlnic ■ limy" insert " dry," and under O. rui-ciiKLLA, before 
"joints" insert " clustrnd." 
Page 120. l iidcr ( >rrxi [\ Mutoui si i.xs and O. FRUTESCEXS, to the localities add " Northern Mexico." 
Page 164. Under Chrysopsis vii.i.osa. for " ecJiinoides" read " rchioidfx." 
Page 239. Under ^Ikktexsta i-ank i i.vta, for (483) read (843.) 
Pagf 2t)7. riidci- (ill! A S( III >i 1 II, b<'lorc '■ 3-.')-ovnled " insert "cells." 
J'agr 2-2. rmlcr A-i i.i.ima-^ i as( ii ti^aius, for •• ./. veiilriUarin'' read " A. rerticiUatd." 
Pane 291. UndiM- Oiuiixi: iMnu.osrKiiiA, for " rtah" read " Central Xevada." 
Page : '.01 1. rndi T IOi:iiii;o\( M im i.aum, omit ■• the segments similar and subequal." 
I'agr :!:;•;. I'di -Lkmxv 1)i:siana," n ad I>i:aixa Valdiviaxa, Philippi." 
Page :;(;:>. I nder Cai!i:\ r.oxiM.Axnir, for ■• \av. mixor, Olney," reatl " Var. MixoR, Boott." 
