. The fern lover's companion; a guide for the Northeastern States and Canada. low the ai)ex. Stipe continuous with therootstock. Veins free. (The name Phegopteris in Greekmeans oak or beech fern.) (1) Oak FernPhcgopleris drijoptcris. Thevlpteris dryopterts Fronds glabrous, broadly triangular, ternatc, four toseven inches broad, the di^•isions widely s])reading, eachdivision ])innate at the base. Segments ol)long, ,entire or toothed. Fruit-dots near the margin. Root-stock slender and creeping from ^\hich fronds are pro-duced all summer, in appearance like the small, ternatedivisions of t
. The fern lover's companion; a guide for the Northeastern States and Canada. low the ai)ex. Stipe continuous with therootstock. Veins free. (The name Phegopteris in Greekmeans oak or beech fern.) (1) Oak FernPhcgopleris drijoptcris. Thevlpteris dryopterts Fronds glabrous, broadly triangular, ternatc, four toseven inches broad, the di^•isions widely s])reading, eachdivision ])innate at the base. Segments ol)long, ,entire or toothed. Fruit-dots near the margin. Root-stock slender and creeping from ^\hich fronds are pro-duced all summer, in appearance like the small, ternatedivisions of the bracken. This dainty fern has fronds of a delicate yellow-green,the greenest of all green things growing. Its ternatecharacter is shown even in the uncoiling of the fronds, thethree round balls suggesting the sign of the parts of the oak fern de^elop with great regularity,each pinna, pinnule and lobe ha^ing another exactlyopposite to it nearly always. In rocky woods, commonnorthward; also in Virginia, Kansas and Colorado. A 122 The Ferx Lovers Compaxiox. Oak Fern. Phrgoptcris Dri/optcri.^ fine species for cultivation at the base of the artificialrockery. (2) The Northern Oak Ferx Phegopteris Rohertiana. Phegopteris calcarea Thelypteris Robertiana Resembles the oak fern, but with fronds rather larger,especially the terminal segment; also more rigid andcoarser in appearance. Stalks and fronds minutely glandu-lar beneath. Lower pinnules of the lateral divisionsscarcely longer than the others. Often called LimestonePolypody, the beech ferns having formerly been classed
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Keywords: ., bookcentury1900, bookdecade1920, bookidcu3192400171, bookyear1922
