POL YPODIA CEM. I O I 



rachis; fronds 6' — 30' long, ovate-oblong, bi — tripinnate; second- 

 ary and tertiary rachises usually deflected and zigzag, rusty 

 puberulent or nearly smooth ; pinnae mostly alternate ; ultimate 

 pinnules 5" — 10" long, roundish-ovate, or sub-cordate, smooth ; 

 margins at first reflexed, soon flattened out. {Allosorus flexu- 

 osus Kaulf.) Western Texas to California. 



15. P. intermedia Mett. Rootstock long, wide creeping, 

 slender, chaffy ; stipes scattered, 4' — 6' long, pinkish-stramine- 

 ous, smooth ; fronds 5' — 10' long, 3' — 8' wide, ovate-bipinnate ; 

 pinnae nearly opposite, remote; pinnules 2 — 6 pairs, petiolate, 

 sub-coriaceous, oval or cordate-ovate ; veins obscure ; ra- 

 chises often pubescent. Huachuca Mountains, South Arizona 

 (Lemmon), Texas {Nealley). 



XVI. STRUTHIOPTERIS Scopoli. 



Sori in a continuous band next the midrib of the contracted 

 pinnas of the fertile frond, covered till mature by an elongate 

 indusium, either formed of the recurved and altered margin of 

 the pinna or submarginal and parallel to the margin. Veins of 

 sterile frond oblique to the midrib, simple or forked and free. 

 Fronds mostly elongate, of two kinds, the sterile foliaceous, 

 the fertile commonly much contracted. Name from Gr. 

 (TTpovQioov, an ostrich, and itrepii, fern. Genus principally of 

 south temperate zone. 



I. S. spicant (L.) Scop. (Deer-fern.) Rootstock short, 

 very chaffy ; fronds tufted, erect, sterile ones nearly sessile, 

 narrowly linear-lanceolate, 8' — 24' long, i' — 3' wide, tapering to 

 both ends, cut to the rachis into oblong or oblong-linear closely 

 set segments, the lower ones gradually diminishing to minute 

 auricles ; fertile fronds sometimes three feet high, long-stalked, 

 pinnate ; pinnae somewhat fewer and more distant, longer and 

 much narrower than in the sterile frond ; indusia distinctly in- 

 tramarginal. [Osmunda spicant L., BUchnum boreale Swz., 

 Lomaria spicant Desv.) California, Oregon, and northward. 



Some of the specimens from California and Oregon have 

 leaves three or four times as long as those found in Europe, 

 and it is possible that we have two species instead of one. 



