12 LACTARIAE OF THE UNITED STATES 
In fresh plant. In the dry substance, 
Analysis, 
Solid. Water. | Proteid. | Fat. Маппие. | Sugar, Ash. Cellulose. ` Waste. 
17 89.83 39.14 5.34 13.14 | 1.98 | 7.37 | 28.93 | 4.10 
82 91.18 26.37 401 15.71 | 4.31 | 5.27 | 38.86 25.47 
; 83 90.17 | 32.21 |6.01| 13.47 | 4.17 | 7.13| 30.30 | 5.81 
2. piperata 77| 88.23 | 28.35 |4.72 12.17 | 4.13 | 8.43| 38.04 | 4.16 
OI 
| 
о. 89.99 | 38.12 |7.37 12.91 | 1.49 | 8.14 | 27.42 | 4.55 
8.90| 91.10 | 27.00 |4.20| 11.57 | 5.27 |848 | 39.27 | 4.21 
стела шей 
L. torminosa | 
L. deliciosa 
P pileus. S— stem. 
ECONOMIC VALUE 
So far as is known, none of the Zactariae are seriously poison- 
ous, although some are considered somewhat poisonous, while a 
large number of the species are edible. Whenever the edible 
qualities are known, I have indicated it at the end of the descrip- 
tion of the species, following, in every instance, the conservative 
opinion. 
S NOMENCLATURE 
In the matter of nomenclature, I have followed the rules of 
the American Code.* According to this, under canon 16 (c), 
Lactarius Fr. is to be regarded as a homonym in the sense that it 
is a variation from Lactaria Pers. merely in the spelling of the 
word ; so that while the latter form must be retained because of 
priority, the name Lactarius is considered as practically identical 
with it, and the transfer of a species from Lactarius Fr. to Lactaria 
Pers. is not to be looked upon as making new combinations. But 
in all cases I have attempted to show which form was used by the 
one describing the species, as well as to indicate any subsequent 
correction. Forexample, “Zactaria pergamena (Swartz) Fr. Epicr. 
340. 1838 [as Lactarius]. — Schrót. in Cohn, Krypt.-Fl. Schles. 
3: 537. 1889," would. be explained as follows : The species was 
described by Swartz under the specific name pergamena, trans- 
ferred from Agaricus to Lactaria by Fries under the form Lactarius 
pergamenus, and later corrected by Schröter to read Lactaria 
pergamena, 
* Bull. Torrey Club 34: 167-178. 1907. 
