SCIENTIFIC AXD POPULAR. 301 



1643. POLYPODIUM, L. Polypody. Polyiwdiaceae. 



Greek name of a kind of Fern, "many footed" . Ferns from 

 creeping rootstocks. About 350 species; 11 in U. S. 



a. P, viilgdre L. Xorthem Asia, Europe and N. America. Com- 

 mon Polypody (Polypod, Polypode, Polypoddy), Rock Brake-", 

 Adder's Fern* Ever-fern, Golden Maidenhair*, Golden Poly- 

 pody, Golden-locks, Moss Fern, Wall Fern, Wood Feni, Poly- 

 pody of the Oak, Polypody of the Wall; Ger. Gemeiner Tiip- 

 felfarn, Siissfarn, Engelsiiss; Fr. Polypode Commun (Codex). 

 Rhizome, Radix polypodii, R. tiliculse dulcis; expectorant, 

 diuretic. 



1644. POLIPORUS, Fries. Agaric, etc. Hymeiiouiycetes. 



From Greek, having "many pores". Syn. Boletus, in part. 

 Fungi (toadstools), mostly of corky or woody texture. A few 

 are edible. 



a. P. fomentarius (L. ) Fries (B. fomentarius L. ). Southern 

 and middle Europe. Oak Agaric, Surgeon's Agaric, Spunk, 

 Punk, Touchwood; Ger. Wundschwamm, Feuerschwamm, 

 Zunder; Fr. Agaric de chene (Codex). Fungus absorbent, 

 hemostatic, (b) P. ignarius (L. ) Fries (B. ignariusL.) and 

 (c) P. margindtlis Fries, yield a similar Agaric, but harder. 



d. P. officinalis Fries (B. laricis Jacq., B. purgans Pers. ). Europe 

 and northern Asia. White Agaric, Larch Agaric, Male Agaric, 

 Purging Agaric, Amadou, German Tinder; Ger. Larchen- 

 schwamm; Fr. Agaric blanc officinal, Polypore du Meleze (Co. 

 dex); hemostatic, purgative in large, astringent in small doses, 



1645. POLYPREMUM, L. Polypremum. Logaiiiaceae. 



From Greek, "many stemmed". Obscure annual herb. One 

 species, southern U. S. and Mexico. 



1646. POLYPTERIS, Nutt. Polypteris. Coiiipositae. 



From Greek, "many winged". Syn. Stevia, Palafoxia, in 



part. Rough herbs with pink or purple flowers. About 6 spe- 

 cies. North America; 4 in U. S. 



1647. P0LY8TACHYA, Hook. Polystachya. Orchidaceae. 



From Greek, "many offshoots". Small epiphytes, mostly 

 natives of Africa, a few in tropical America and Asia; 1 in U. S. 



1648. POLYTAESIA, DC. Polytsenia. Umbel liferae. 



From Greek, with "many fillets" (i. e. oil-tubes). Herb 

 with yellow flowers. One species, east-central U. S. 



1649. POLYTRICHUM, L. Hair cap Moss. Musci. 

 From Greek, "very hairy". Tall showy mosses, north tem- 

 perate and arctic zones. About 10 in U. S. 



a. P. comniiine L. Europe and U. S. Golden Maidenhair, 

 Bear Moss, Besom Moss, Golden Moss, Goldilocks, Silver 

 Heather, Silver Ling; Ger. Golduer Widerthon. Plant, Herba 

 adianti aurei, H. polytrichi; diuretic, as is (b) P. jimiperiniim 

 Hedw., Europe and U. S., Hair-cap Moss, Bear's-bed, Ground 

 Moss, May-queen Moss, Robin's Rye. 



