54 Rhodora [March 



Obs. — As pointed out in my previous note (Rhodora, iv. 9) Poly- 

 stichum is especially characterized by its densely opaque, or coria- 

 ceous texture, auricled pinnae and aculeate or spiny toothed lobes. 



9. Polystichun Acui.EATiM Swartz, var. Braunii Davenport 

 (RHODORA, 1. C.). Stipes and rachises thickly clothed with soft hairs 

 and chaffy scales ; crosiers densely covered with rich brown scales 

 and chaff; margins of lobes aculeate. Mountain ravines. Me., N. 

 H., Vt. 



Under Division C (Rootstock caespitose). Plants small. 



10. PBLLA&A atkopurpurea, Link. Purple Cliff-Prake. Not 

 strictly caespitose, but rhizomes short, moderately stout, and with the 

 stipes so closely approximated as to appear tufted. Doubtfully ever- 

 green with us unless in especially favorable situations. Miss Slosson 

 writes me that she has found that it drops its pinnae in winter, "the 

 stipes and rachises remaining." Needs further investigation and the 

 winter season is a good time for it. Limestone cliffs. N. H., Vt., 

 Mass., R. L, Ct. 



11. Asplenium Trichomanes, Linnaeus. False Maiden-hair. 

 Fronds all alike, narrowly linear, pinnate ; stipes and rachises black, 

 or purplish black, and shining. Rock crevices, Me., N. FL, Vt., 

 Mass., R. I., Ct. 



12. Asplenium viride, Hudson. Green Spleenwort. Resem- 

 bling no. 11, and in similar situations, but with stipes and rachises 

 green. Vt. 



13. Asplenium eheneum, Ait Ebony Spleenwort. Sterile fronds 

 in rosette-like clusters at the base of the taller erect fertile fronds ; 



stipes and rachises purplish black and shining, or in var. Hortonae 



a sterile form with plumose fronds — reddish. With no. 11, Me., 

 N. FL, Vt., Mass., R. L, Ct. 



14. Asplenium ebenoides, R. R. Scott. Fronds more or less 

 distorted, and sometimes proliferous. A natural hybrid between 

 nos. 13 and 17 with which it has always been found growing and 

 to be looked for wherever those two ferns are plentiful in close proxi- 

 mity to one another. Vt. (Eggkston, Woohon &> Sitift), Ct. {Adam). 



15. Asplenium montanum, Willdenow. Mountain Spleenwort. 

 Fronds ovate-lanceolate and much incised. A comparatively recent 

 addition to our New England fern-flora, and as yet little known. 

 Limestone cliffs, Ct. 



