SECTION SPONGIOSUS. 



Spores pale color, /x 12 (or 3 x 5 in the American plant). The type 

 form which is mesopodal is only known in Europe from Fries' Icones 

 t. 3. The pleuropodal form occurs but is also rare. In the United 

 States the mesopodal form is not rare in New England and the pleuro- 

 podal form is still more common. 



TOM ENTOSUS. Same as the preceding plant but thin, the 

 upper, spongy context layer being very slightly developed. Same color 

 and setae. Frequent in the pine woods of Sweden, If it occurs in 

 central Europe it is rare, and it is unknown from the United States. 



The following two are not stipitate, but we mention them here on account of their evident close relationship 

 to the preceding. 



TRIQUETER. In the sense of Fries (?) and Romell, a thick, sessile form 

 of circinatus. Same context, color, and setae. It is rare in Europe. In the 

 original sense of Persoon it is in my opinion the same as cuticularis. 



LEPORINUS. A thin, dimidiate form of the same plant. Rare in Europe 

 and the United States. 



b. SETAE NONE. 



SIDEROIDES. Context ferruginous, spongy. Spores abundant, 

 colored, globose, 8-9 mic. Stipe in the type form thick, pleuropodal, 

 spongy. This species is represented at Leiden by several collections 

 from Java, but not in other museums (except one cotype at Kew). 

 The most perfect forms have a general resemblance in color and shape 

 to Polyporus Schweinitzii. Thin forms occur with lateral stipes, and 

 the type of Polyporus Korthalsii, at Leiden, appears to be a sessile 

 form. 



PUIGGARIANUS. Context spongy, soft, brown. Spores abun- 

 dant, conidial, globose, minutely rough. According to the collector's 

 notes a large, infundibuliform species. Known from a piece of the 

 pileus at Berlin, from Brazil. 



ALBERTINII (Fig. 460). Pileus mesopodal. with thick, obese 

 stem. Surface and context, pores and stem concolorous, ferruginous. 

 Context soft, spongy with large, inflated hyphae. Pores large, angu- 

 lar, decurrent on the stem. Setae none. Spores abundant, colored, 

 6x8, smooth. Specimen at Kew from Endeavor River, Australia, re- 

 ferred by Cooke to Schweinitzii, which it closely resembles in general 

 appearance. Named for Albertini, who was the tutor of Schweinitz. 



AIONTAGNEI. Pileus obese, ferruginous, with uneven surface. 

 Pores concolorous, medium large, decurrent. Spores 8 x 10, pale col- 

 ored, smooth. Setae none. Rare in both the United States and Europe. 

 This plant is usually placed in the next section, but is rather obese for 

 the allied plants of that section. 



FRAGILISSIMUS. Context soft, spongy, cinnamon-ferruginous. Pores 

 concolorous. Spores 3-4 x 4-5, deeply colored, smooth. Stipe mesopodal. Known 

 only from pieces of the pileus in the herbarium of Montagne from French 

 Guiana. 



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