128 NEW YORK STATE MUSEUM 
Betula lenta (carpinifolia) (sweet birch) 
*36 A crimson red erineum, turning to ochreous, in straight 
beady lines, midway between the ribs or closely bordering the ribs, 
or both, on upper side of leaf. Trichomes capitate. 
Schweinitz ’34, no. 2809 (Erineum lineola) Pa. 
Specimens in the State Herbarium from the Helderbergs (Pro- 
fessor Peck) labeled E. lineolum. There seems to be no 
doubt of the identification; de Schweinitz’s description is full and 
precise. Also from Gravel pond, Grafton, Rensselaer co. = NAYS 
37 A rosy pink erineum in large patches on the upper side of 
the leaf. 
Garman ’92, no. 17 N.H. 
Jarvis ’07, p.63, fifth sp. Ont. 
Possibly a spreading form of the preceding. | 
Betula lutea (yellow birch) 
38 A bud deformation, crowded and irregular, often in bunches 
of large size. 
Hagen ’85, no. 37 Mass. 
Jarvis ’07, p.59, seventh sp., pl.A, fig. 6 Ont. 
Betula nigra (red birch) 
40 rie pDernlimwunn ILitak mo, AO. 
Schweinitz 734, no. 2804 Pa. 
Placed under Erineum proper, with capitate trichomes, and simi- 
larly under Grumaria by Persoon ’22: no. 17, who describes it as 
“effusum planiusculum primo subgrumosum albidum, purpureum 
et roseum, dein rubiginosum obscurum. Cresc. in utraque pagina 
fol. Betulae albae, sed magis in superiore, praesertim si colore est — 
rubro. Huc pertinent ut varietates E. betulinum roseum et pur- 
pureum auctorum.” 
4o Erineum roseum Link no. 25, “ frequens.” 
Schweinitz 734, no. 2803 Ray Calle 
Persoon considered this a color variety of the preceding, as will 
be seen from the above quotation. Loew, Verh. der k. k. zool.-bot. 
Ges. in Wien 1885: 455, 461 describes E. roseum Schultz as 
forming small irregular, mostly elongated, crummy patches of a 
blood-red color upon the upper surface of the leaves (of B. alba, 
humilis and pubescens); in the early summer carmine red. 
