234 HYDNEI. 



Hydnum. IV. APUS (a, novs, a foot. Stemless). Pileus sessile, dimidiate, marginate, 



often effuso-reflexed. 



* Pileus fleshy, soft. 



** Cfespitose, pilei imbricated, commonly pliant, tough. Very distinguished. 

 *** Simple, pileus coriaceous or corky. 

 **** Pileus membranaceous. 



V. RESUPINATI. Pileus none. Absolutely resupinate, with straight or 

 oblique spines according to their situation. 



* Spines fuscous, ferruginous. 

 ** Spines yellowish, green. 



*** Spines flesh-colour, lilac, rufescent. 



**** Spines white or light-yellowish when old. 



I. MESOPUS. Entire, simple, with a central stem. 



t Pileus fleshy, somewhat fragile. 

 * Spines changing colour, pileus scaly or tomentose. 



1. H. imbricatum Linn. Pileus about 10 cent. (4 in.) broad, 

 umber, zoneless, fleshy, rather plane, somewhat umbilicate,y?^- 

 cose, tessulato-scaly ; flesh dingy whitish. Stem curt, 2.5-7.5 

 cent. (1-3 in.) long, 2.5-5 cent. (1-2 in.) thick, even. Spines 8-12 

 mm. (4-6 lin.) long, decurrent, cinereous-white. 



There are two forms : one with the pileus plane and with thick persistent 

 scales, another with the pileus somewhat infundibuliform, and with thinner, 

 at length separating scales. 



In pine woods. Rare. Sept.-Nov. 



Often abundant where it occurs. Edible but bitter. Spores spherical, 

 subhyaline, 3 mk. K.; 6x 5 mk. W.G.S. Name imbrex, a tile. Imbricated. 

 Linn. Suec. n. 1257. Ft: Hym. Eur. p. 598. Sv. at I. Sv. t. 33. Berk. 

 Out. p. 257. C. Hbk. u. 842. S. Mycol. Scot. n. 798. Scha-ff. t. 140. Fl. 

 Dan. t. 176, 1500. Sow. t. 73. Grev. t. 71. Barla t. 38. /. 1-4. Harz. t. 36. 

 Kl. Bor. t. 462. Bail. t. 29. Nees Syst. f. 240. 



2. H. squamosum SchserT. Pileus rufous-fuscous, fleshy, 

 irregular, depressed, smooth, breaking up into irregular scales j 

 flesh whitish. Stem curt, attenuated downwards, white. Spines 

 grey-fuscous, whitish at the apex. 



Smaller than H. imbricatum, rigid. Pileus even when young. 



On the ground. Fungus Show, South Kensington, 1873. O ct - 



Name squama, a scale. Schceff. t. 273. Fr. Hym. Eur. p. 598. B. & Br. 

 n. 1435. 



3. H. scabrosum Fr. Pileus about 10 cent. (4 in.) broad, 

 umber-ferruginous, compactly fleshy, at first turbinate, then plane 

 above, very convex beneath, at first tomentose, then rough with 

 flocci which are fasciculate in the form of minute crowded 



