File:Contributions from the Botanical Laboratory and the Morris Arboretum of the University of Pennsylvania, vol. 14 (1934) (20679375502).jpg

Title: Contributions from the Botanical Laboratory and the Morris Arboretum of the University of Pennsylvania, vol. 14
Identifier: contributionsfro14univ (find matches)
Year: 1934 (1930s)
Authors: University of Pennsylvania. Botanical Laboratory; University of Pennsylvania. Morris Arboretum
Subjects: Botany; Botany
Publisher: Philadelphia : (s. n. )
Contributing Library: Penn State University
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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y. c < r. < y. *-^ y. y. Si a! c »^-- i-Wv* r \v pale scales. Pinnae may lie close too-otlior, as in the frond shown at the ri«,'ht ot* Plate 1, or a<»-ain may he spaced as widely as is normal in var. gcnuina. The sinuses between fertile se^-ments are usually very narrow, as in the frond pictured, and also the type specimen, but on occasional vi^^orous plants may be wider. Arkansas.—Specimens from rocky woods just north of Shirley, Van Buren Co., have been distributed by the discoverer, E. J. Palmer, and also by Dcmaree and :\Ioore. Some of these have much the aspect of the Alabama mate- rial, and the sori lie well out, bein<,- at least medial or even sli«,ditly supra-medial. Here too the scales vary from the pale brown of 1). clintoniana to the dark and shinino- ones of I), (joldiana. The latter is approached also in one other respect—the basal pinnae may liave their lowermost segments shortened, so that their outline is somewhat lanceolate. Sinuses between lobes vary from narrow to wide, the fronds in extreme cases becom- ing bipinnate. Louisiana.—P:arly in 193G Dr. Clair A. Brown dis- covered a colony 6 miles southeast of Baton Rouge,-which I visited in September. Here the plants approach var. gcnmna in having s.u'i beginning to appear not far above the base of the blade, and occupying a slightly infra- medial posit ion. The sinuses between fertile lobes show, however, a marked tendency to widen, so the occurrence is classed as var. austral is. North Carolina.—:Material collected by Rev. Fred AV. Gray 9 miles north of Charlotte, Mecklenburg Co., has been figured by Blomquist."^ This shows a.i approach to D. floridana in elliptic frond-outline, the lower 4 pairs of pinnae being ))r()gressively shortened, but is^ chn- toiiiana in every other respect. In the narrow sinuses sFernsof N. C: 05. 1934. INTENTIONAL SECOND EXPOSURE

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