. Contributions from the Botanical Laboratory and the Morris Arboretum of the University of Pennsylvania, vol. 13. Botany; Botany. Fl(!. 1.—PkLLAEA HEXSA at its SOUTHEAKTEKX limit, liLACK Lake, I m 1 tain, about 5 milos iiortliwost of lilairstowii, Warroii (\)iiiity, Xow Jorsey, in the lioix' of r('(lisfovorin«,r AspJeu- ium TruileUi, collected there by (^arliart many years ago. Aspleniiim montanum was found in abundance, several miles east of its previously known colonies near Delaware Water Gap, but A. TrudeUi eluded us. Then just as we were about to leave, a single plant of .1. lir
. Contributions from the Botanical Laboratory and the Morris Arboretum of the University of Pennsylvania, vol. 13. Botany; Botany. Fl(!. 1.—PkLLAEA HEXSA at its SOUTHEAKTEKX limit, liLACK Lake, I m 1 tain, about 5 milos iiortliwost of lilairstowii, Warroii (\)iiiity, Xow Jorsey, in the lioix' of r('(lisfovorin«,r AspJeu- ium TruileUi, collected there by (^arliart many years ago. Aspleniiim montanum was found in abundance, several miles east of its previously known colonies near Delaware Water Gap, but A. TrudeUi eluded us. Then just as we were about to leave, a single plant of .1. lirud- Icfji, not previously reported from the state, was noticed in a vertical joint-crevice in the (juartzite clitt'. Five months later the place was revisited, in comi)any with Mr. Harry W. Trudell, and the clifl^" was more fully exi)lored. Xot only were six additional plants of this s|)ecies found, in other joint-crevices, but also a colony of the liybrid A. Bradleyixmontmivm. The station is 40 miles, as the spore blows, east of the nearest known Pennsylvania occurrence of A. Bradlejfi at Glen Onoko, Carbon County, and about 75 miles southwest of the long-lost colony in the Shawangunk Mountains in Ulster (V)unty, Xew York. AsPLKXiUM Ri:siLii:xs IX Pi:xxsYLVAN"iA.—Ever since the finding of the black-stem spleenwort in Maryland last year I have cherished the hope of extending its range still farther north, and on September 12 made a systematic search for it. In the main limestone valley around (Ireen- castle there seemed to be no cliffs of sufficient size to fur- nish a favorable habitat for it, but in a narrower strip of limestone east of :Mercersburg several promising cliifs were located and searched, one after another. Although the only abundant fern of this group was A. fyirhommirs. a small' colonv of the species sought was finally found on one sheltered cliff. (See Plate Pi, fig. 2.) To avoid pos- sible destruction by over-enthusiastic collectors its exact lo
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