RMRDXETA–. The origin of a land flora, a theory based upon the facts of alternation. Plant morphology. DENNSTAEDTIA-DAVALLIA SERIES 615. Fig. 340. Davallia hymenophyll- oides. Pinnule enlarged. (After Hooker, from Christ's Farrnkraiiter.) uniformity of structure of the sorus on the mixed plan, with flat receptacle, and with no definite rule of orientation of the long-stalked sporangia. The connection of the D,ennstaedtia-Davallia series with such genera as Lindsay a, Pteris, Pellaea, and Adiantum, where the sori are marginal, seems beyond question, and it is strongly supported by the anatomical evidenc
RM2FN99PD–A second grouth hardwood forest in autumn in the Delaware State Forest, Pocono Mountains, Pennsylvania
RM2TDK10H–Scanned and inverted cyanotype photogram
RMPEKNAY–Hayscented fern (Dennstaedtia punctilobula) Colony with fallen white birch tree trunk, Greater Sudbury, Ontario, Canada
RM2C1FYCM–Dennstaedtia sp Dennstaedtia sp.
RMRDXEW8–. The origin of a land flora, a theory based upon the facts of alternation. Plant morphology. 6o6 FILICALES which, however, soon develops a pith. The anatomy of this Fern, which deserves a thorough reinvestigation, appears to be comparable with that of a solenostelic Dennstaedtia : it suggests the structure from which the more complicated Cyatheaceous stems may have arisen. Another species with exceptionally simple structure is stated to be A. blechnoides, which is peculiar in having a trailing axis.1 In the vast majority of the Cyatheae the vascular system consists essentially of a dictyostel
RM2FN9BJF–A second grouth hardwood forest in autumn in the Delaware State Forest, Pocono Mountains, Pennsylvania
RMPEKN87–Hayscented fern (Dennstaedtia punctilobula) Colony surrounding white birch tree trunk, Greater Sudbury, Ontario, Canada
RM2BXB9GT–Dennstaedtia sp Dennstaedtia sp.
RMRE3RYA–. Ferns of the Camp Wigwam region. Ferns. 10. HAY-SCSNTED FERN (Dennstaedtia punctilobula). Fronds. 1 to 3 feet long. Twioe-pinnate. Creeping rootstock. Stipes smooth aM chestnut hrovra. Rachis and Tinder iatirface of blade minutely hairy. Sori small, round, usually one at base of each segment. Blade sword- shaped, Fragrajit when crushed. Rocky woods and hillsides. Common. BRITTLE FERN (Filix fragilis). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly r
RMPEKNAD–Hayscented fern (Dennstaedtia punctilobula) Colony with fallen white birch tree trunk, Greater Sudbury, Ontario, Canada
RM2C1C0RM–Dennstaedtia sp Dennstaedtia sp.
RMRDXETE–. The origin of a land flora, a theory based upon the facts of alternation. Plant morphology. 614 FILICALES of the receptacle may grow up into a sporangium, developing as such in any order whatever, and without any regularity of orientation. The confused mass which results is shown in Fig. 339 c, and this also illustrates how, as the sporangia grow older, their stalks, composed in the lower part of but a single row of cells, become elongated. The vascular strand runs upward to a point immediately below the surface of the sorus, and there widens out. Fig. 339. A =sorus of Dennstaedtia. rubigino
RMPEKN7G–Hayscented fern (Dennstaedtia punctilobula) Colony surrounding white birch tree trunk, Greater Sudbury, Ontario, Canada
RM2KEDE55–Fern colonies, Crawford Notch State Park, New Hampshire, USA
RM2C1FYAX–Dennstaedtia sp Dennstaedtia sp.
RMRJ5EC3–. How plants grow [microform] : a simple introduction to structural botany with a popular flora, or an arrangement and description of common plants, both wild and cultivated. Botany; Ferns; Botanique; Fougères. A^A^IA|I ^EF^fvJS |LLU$TFATin[vl^ DF [] E [vJ E F^A. I. 5TRUTHDPTERI5 5. CYSTDPTERIB 3.LABTREA I3.5CHIZa1:a 2.QNDCLEA B.PTERI3 ID. CAMPTDSDRUS 14. PHEGDPTE PI5 3. WDDDBIA 7. SCDLDPENDRIUM II.PDLYSTICLIUM I5.A5PLENIUM 4. DENNSTAEDTIA S.ATHYRIUM 12 . PD LYPDDIUM IB . BDTR YCH lUM IZ.DPHIDDLDSSUM ;. Please note that these images are extracted from scanned page images that may have been d
RM2KEDE63–Fern colonies, Crawford Notch State Park, New Hampshire, USA
RM2C1C0T4–Dennstaedtia sp Dennstaedtia sp.
RMRDXN2J–. The origin of a land flora, a theory based upon the facts of alternation. Plant morphology. Fig. 64. a, b, c, j, k-GIeichenia fiabellata, Br. d, e, jf=Gl, circinata, Sw. g, k, i=Gl. dichotoma, Willd. a, b, c, d, show young son with sporangia marginal. £ shows a similar condition in GL dichotovia, but in h and ;" the vacant middle space is occupied by young sporangia, a-i,â ' 200. j, kX 100.. Fig. 65. .-/, B, Dennstacdtia apiifolia, Hook. A shows the regular basipetal succession sporangia characteristic of the Gradate. C, D, Dennstaedtia. rubiginosa, Kaulf. shows irregularity in the suc
RM2KEDE74–Fern colonies, Crawford Notch State Park, New Hampshire, USA
RM2C1FYB9–Dennstaedtia sp Dennstaedtia sp.
RM2KEDE66–Hay-scented fern colony, Crawford Notch State Park, New Hampshire, USA
RMRMWF64–. Annales des Sciences Naturelles Botaniques. 308 P. PARMENTIER.. brandies est moins renflée chez les Dicksonia que chez les Cibotium. Si l'on examine attentivement la structure de ce bois, urlout celui des Cibotium, on distingue assez nette- ment la tendance aux oscillations constatées chez les Mat oui a. Le bois des Dennstaedtia [D. producta, D. cor- Fja 9 nutd) examiné aussi dans une nervure secondaire et la nervure médiane, se rapproche beaucoup de celui des deux genres précédents (lîg. 9), mais les bran- ches sont plus largement ouvertes et les crochets plus rap- prochés de celles-ci. La
RMANNNJ5–Hayscented fern (Dennstaedtia punctilobula} Small colony on rockface, Greater Sudbury, Ontario, Canada
RMA5CMM9–Hayscented fern (Dennstaedtia punctilobula) Large colony of ferns in birch woodlands, in early autumn, Greater Sudbury, Ontario, Canada
RM2C1FYDY–Dennstaedtia sp Dennstaedtia sp.
RMRMWF5X–. Annales des Sciences Naturelles Botaniques. brandies est moins renflée chez les Dicksonia que chez les Cibotium. Si l'on examine attentivement la structure de ce bois, urlout celui des Cibotium, on distingue assez nette- ment la tendance aux oscillations constatées chez les Mat oui a. Le bois des Dennstaedtia [D. producta, D. cor- Fja 9 nutd) examiné aussi dans une nervure secondaire et la nervure médiane, se rapproche beaucoup de celui des deux genres précédents (lîg. 9), mais les bran- ches sont plus largement ouvertes et les crochets plus rap- prochés de celles-ci. La disposition du bois
RM2BTWA5M–Dennstaedtia cicutaria Sw T Moore.
RMRCNDGY–. Die Farnkräuter der Erde : beschreibende Darstellung der geschlechter und wichtigeren Arten der Farnpflanzen mit besonderer Berücksichtigung der Exotischen. Ferns. 76 Zweiter Theil. Beschreibung der Gruppen, Geschlechter und Arten. 21. Mouachosornin Kunze. Poljpodium Blume. Hool: Bali, synops. Ein Monotyp vom Aufbau einer grossen Davallia oder Dennstaedtia, mit kriechendem, dünnem Rhizom, röhrenförmig- geschlossenem Gefäss- bündelstrang, ohne Schuppen, sondern mit röthh'chen Borstenhaaren be- setzt, ungegliedertem Blattstiel und mit gebüschelten, sehr stark zertheilten Blättern, in deren seh
RMRCNCNC–. Die Farnkräuter der Erde : beschreibende Darstellung der geschlechter und wichtigeren Arten der Farnpflanzen mit besonderer Berücksichtigung der Exotischen. Ferns. Dennstaedtia Bernh. 311 fiedert, Fiedersegmente mittelgross bis klein, oft sehr fein. Haare, keine Schuppen. Etwa 20 Arten, wovon eine vorwiegend tropisch-amerikanische, nahe verbundene Artengruppe. Eine Art ist nordamerikanisch. 985. D. obtusifolia (WiUd.) Moore. Dicksonia adiantoides H. B. Kth. Blattstiel aufrecht, fein behaart, zerstreut stehend. Blätter 1 m lang, oval-deltoid, untere Fiedern bis ^/2 m lang und 3 dem breit, lan