PL cell. aph. 1 1 . HYMENOTHECEiE. 597 
F. Hymenium veined ; veins anastomosing ; cap leatherlike , 
corky. Daedaleadese. 
Cap semicircular D^edalea. 266. 
G. Hymenium tubular; tubes short , persistent , not cut; 
cap leatherlike or woody. Boletideae. 
Thallus attached by its back Poria. 267. 
Thallus semicircular Boletus. 268. 
Stem lateral ; cap semicircular Grifola. 269. 
Stem central ; cap orbicular, mem- 
branaceous CoLTRICIA. 270. 
Stem central ; cap orbicular, fleshy, 
concave Strilia. 271. 
Stem central ; cap orbicular, fleshy, 
convex Albatrellus. 272. 
Stem lobed ; lobes branchlike, porous Polyporus. 278. 
H. Hymenium tubular ; tubes long , separable from the 
cap, not cut ; cap convex, fleshy. Suillidese. 
Tubes close ; stem central ; 
collar distinct ; cap orbicular Suillus. 274. 
Tubes close; stem central; 
collar fibrous; cap orbicular Pinuzza. 275. 
Tubes close ; stem central ; 
collar 0 ; cap orbicular Leccinum. 276. 
Tubes separate ; stem lateral ; 
collar O', cap semicircular Fistulina. 277. 
I. Hymenium toothed, teeth lamellar , torn ; cap leather- 
like. Sistotremadese. 
Stem distinct ; cap concave Sistotrema. 278. 
Stem 0; cap semicircular Cerrena. 279. 
Thallus attached by its back Xylodon. 280. 
K. Hymenium spinose ; spines not divided . Hydnidese. 
Cap regular, fleshy, convex ; 
stem central, naked Hydnum. 281. 
Cap regular, fleshy, concave; 
stem central, naked Dentinum. 282. 
Cap regular, membranaceous ; 
stem lateral, naked Auriscalpium. 283. 
Cap semicircular, sessile Stecherina. 284. 
