110 SECTION HYGROCYBE 



Illustrations: 



Figs. 27 and 28; also 5. 



Bulliard, Herb. Fi\, pi. 50 (as Agaricus croceus) . 



Gillet, Champ. Fr., pi. 133 (332) . 



Gussow and Odell, Mushrooms and Toadstools, pi. 46, fig. 1. 



Juillard-Hartmann, Icon. Champ., pi. 49, fig. 3. 



Konrad and Maublanc, Icon. Sel. Fung., pi. 380. 



Lange, Flora Agar. Dan. 5, pi. 167D. 



Murrill, Mycologia 2, pi. 27, fig. 8. 



Pomerleau, Mushrooms of Eastern Canada and the U. S., fig. 16A, and 



pi. 2, fig. 11. 

 Ricken, Die Blatterp., pi. 8, fig. 4. 

 Schaeff., Fung. Bavar., pi. 2. 



Smith, Mushrooms in their Natural Habitats, Reel 11, No. 77. 

 Smith and Hesler, Lloydia 5, pis. 6 and 7. 



Thomas, Field Book of Common Gilled Mushrooms, pi. 10, fig. 59. 

 Wakefield and Dennis, Common British Fungi, pi. 35, fig. 4. 



Pileus 2-7(9) cm broad, sharply to obtusely conic, sometimes con- 

 vex with a conic umbo, not expanding, usually reddish or scarlet- 

 orange around and on the umbo, paler orange toward the margin, often 

 with distinct olive tints or "citron green" all over, occasionally bright 

 yellow, "ochraceous orange," "zinc orange," "xanthine orange" to 

 "orange rufous," olive-gray to black in aging, quickly becoming black 

 when bruised or broken, slightly viscid when moist, soon dry, glabrous 

 or somewhat virgate in age, sometimes becoming fibrillose-subscaly 

 from the lacerated cuticle, margin frequently incised or lobed, some- 

 times rimose. Context thin and very fragile, concolorous with the sur- 

 face, blackening; odor and taste not distinctive. 



Lamellae nearly free, nearly white at first, becoming grayish oli- 

 vaceous, pale yellowish orange or olive-yellow ( "orange buff," "sulphur 

 yellow," "olive-ocher" ) , black when bruised or in age, close, broad. 

 ventricose, edges undulate to serate or eroded. 



Stipe (2)6-11(18) cm long, 5-10(15) mm thick, base whitish, re- 

 mainder dark red, orange, yellow or sordid olive-yellow, becoming 

 black in age or where bruised, equal, strict, moist or dry, not viscid, 

 fragile, splitting, glabrous or with appressed fibrils, often longitudinally 

 striate and twisted, hollow. 



Spores (8)9-12(14) X (5)5.5-6.5(7.5) p, subellipsoid to ellipsoid, 

 often irregular in shape, smooth, white in deposits, yellow in Melzer's 

 reagent. Basidia (28)34-49 X (6)9-11(12) fx, 1-, 2-, 3-, or 4-spored. 

 Pleurocystidia and cheilocystidia none. Gill trama parallel, hyphae 

 8-18 /x broad, with large lactifers intermingled, yellowish to hyaline in 

 iodine. Pileus trama homogeneous, cuticle formed by a thin (20-35 /x) 

 poorly organized layer of colorless gelatinous hyphae which are repent 

 or more or less erect, 5-7 fx broad. Pileus trama of radial and parallel 



