396 BRITISH FUNGI 



H. cyatkifornie. — Cap almost funnel-shaped, thin, pale grey, edge 

 white ; stem slender, grey ; spines short, whitish, crowded. 

 In fir woods. 



2. Stem attached to edge of cap. 



H. auriscaipium. — Cap kidney-shaped, thin, hairy, dark brown, 

 \-l in. across ; stem slender, dark, 2-3 in. long ; spines dark. 

 Our only Hydnum with a truly lateral stem. 

 On fallen fir cones and among fir leaves. 



3. Cut up into many branches, or forming a solid tubercular mass 

 bearing the spines. 



H. coralloides. — Pure white, dingy with age, divided into many 

 tapering, interwoven branches, bearing long spines on one side. 



Often forms coralloid or cauliflower-like tufts, 6 in. to half a yard 

 across. ' 



On decayed wood. 



H. erinaceum. — White, then yellowish, fleshy, irregularly tuber- 

 culose, pendulous, fibrillose ; spines pendulous, crowded, 1-2J in. 

 long. 



H. caput-meduscB. — Forming a tubercular mass tapering to the 

 point of attachment, white, then greyish, covered all over with 

 spines, those on the upper surface small and distorted, those on 

 the under surface -|— | in. long, straight. 



On trunks. 



4. Sessile and attached by a broad base, horizontal. 



H. cirrhatum. — Fleshy, often imbricated, white tinged yellow or 

 reddish, upper surface with curly, abortive spines ; under spines 

 |-f in. long, pale, 2-4 in. across. 



On trunks. 



H. diversidens. — Irregularly tuberculose, 2-3 in. across, whitish 

 or tinged yellow ; upper surface with erect, notched teeth, edge 

 with club-shaped outgrowths ; under spines 3-6 lines long. 



Often very irregular in form. 



On trunks and stumps. 



H. ochraceum. — Thin, leathery, ochraceous, zoned, partly or 

 sometimes entirely resupinate ; spines minute, ochraceous. 



Readily separable from the wood. 



5. Entirely resupinate or adnate to the matrix. 

 * Spines brown or rusty. 



H. squalinum. — Substance pale wood-colour, firm, leathery, thick, 

 somewhat circular, 2-3 in. across ; spines crowded, stout, com- 

 pressed, ferruginous, then brownish, 3-4 lines long. 



On trunks, etc. 



H. membranaceum. — Thin, 1-2 in. across ; spines acute, about 

 I line long. 



Sometimes paler and yellowish. Not separable. 



On fallen branches. 



