vi ERRATA 
Page 96, line 7, add of at end of line. 
Page to2, line 2, for Szumo read Izumo. 
Page 106, line 19, for Pl. 28 read Pl. 23. 
Page 107, line 10, for set read sent. 
Page 108, line 2, for attached read attacked. 
Page 182, line 16 from bottom, for pl. 1 read pl. 9. 
Page 1go, line 11, for skin read stem. 
Page 1gt, line ro, for no. read near. 
Page 192, line 6, for habitat read habit. 
Page 195, line 4 from bottom, for 72 read 70. 
Page 201, line g from bottom, for 30 read 50. 
Page 207, line 12 from bottom, for f. 20 read f. 21. 
Page 208, line 3 from bottom, for tenibus read tenuibus. 
Page 547, line 17, the paragraphs commencing ‘‘ The Cusick speci- 
men ’’ to the words ‘* Brewer specimen’’ on page 548, line 14, belong 
under Lappula Californica on page 546. 
Page 628, line 7, for Gypmnopteris read Gymmnopterts. 
Page 498, line 20, for preceding read following. 
Page 499, line 7 from bottom, for 23 read 22. 
Page sor, line 14, for 24 read 23. 
Page 502, line 1g, after pl. insert 22. 
Page 504, line 5, for 0.009 read 0.019. 
Page 504, line 21, for 24 read 23. 
Page 506, line 3, for 25 read 24. 
Page 507, line 12 from bottom, for 23 read 22. 
Page 509, line 13, after stenophylla insert and L, hamulata 
_ Page 509, line 18, after propagala insert (pl. 24. f. 10). 
Page 509, line 6 from bottom, for PLarre 23 read PLATE 22. 
Page 510, line 8, for PLATE 24 read PLATE 23. 
Page 510, line 21, for PLATE 25 read PLATE 24. 
