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Page number:59 
Description type:Non-original description 
Description:Poria regularis Murr. Fig. 34 Mycologia 12:87. 1920 (NY; BPI; K). Poria arachnoidea Murr., Mycologia 12:307. 1920 (NY; BPI; FH; K). P. submollusca Murr., same vol., µm. 306 (NY; BPI; FH; K). P. tenuissima Speg., Buenos Aires Mus. Argen. Cien. Nat. Anal. 31:371. 1923 (BA). P. subvulgaris Rick, Broteria 6:151. 1937 (lectotype-PACA; BPI). P. velata Rick, Broteria 6:148. 1937 (lectotype-PACA; BPI).
Annual, usually in small patches but sometimes becoming effused, up to 1 mm thick, separable, without distinctive taste; margin white, arachnoid, narrow to wide, sometimes with a weak develo µment of white rhizomorphs; pore surface white to cream, glancing, the tubes very soft and easily crushed, up to 1 mm long, pores rounded to angular, 4-5 per mm, edges becoming rather thin and somewhat fimbriate; context white, very soft-fibrous, thin, continuing unchanged into the trama.
Tissue not changing color in KOH; hyphal system monomitic, the context of generative hyphae which are moderately branched, frequently incrusted with large linear crystals, thin-walled, with both clamp connections and simple septa, sometimes more or less swollen at the septa, 2-5 (-7) µm in diameter; tramal tissue continuous with the context and the hyphae similar except mostly 2-3 µm in diameter; hymenium 11-14 µm thick; cystidia numerous, long-cylindric, incrusted, 4-8 µm in diameter; basidia cylindrical-clavate, 10-13 x 4-6 µm; spores hyaline, echinulate, IKI -, oblong-oval to nearly globose, 2.5-4 x 2-3.5 µm.
On angiosperms in Pa., N.C., S.C., Fla., Ga., La., Texas, Iowa, Costa Rica, Jamaica, Brazil and Paraguay; associated with a white rot. The fruiting body differs from P. candidissima only in having cystidia.
The types of Poria subvulgaris (No. 18685) and of P. velata (No. 18648) may not exist, as Herb. Anchieta loaned, respectively, Nos. 18596 and 18513. These are considered lectotypes for these two species.
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