Previous articleNext article No AccessNeedle Structure as an Aid in Distinguishing Colorado Blue Spruce from Engelmann SpruceH. F. MarcoH. F. Marco Search for more articles by this author PDFPDF PLUS Add to favoritesDownload CitationTrack CitationsPermissionsReprints Share onFacebookTwitterLinkedInRedditEmail SectionsMoreDetailsFiguresReferencesCited by Volume 92, Number 4Dec., 1931 Article DOIhttps://doi.org/10.1086/334220 Views: 7Total views on this site Citations: 4Citations are reported from Crossref Journal History This article was published in the Botanical Gazette (1876-1991), which is continued by International Journal of Plant Sciences (1992-present). PDF download Crossref reports the following articles citing this article:Chengyu Weng, Stephen T Jackson Species differentiation of North American spruce ( Picea ) based on morphological and anatomical characteristics of needles, Canadian Journal of Botany 78, no.1111 (Nov 2000): 1367–1383.https://doi.org/10.1139/b00-111Chengyu Weng, Stephen T Jackson Late Glacial and Holocene vegetation history and paleoclimate of the Kaibab Plateau, Arizona, Palaeogeography, Palaeoclimatology, Palaeoecology 153, no.1-41-4 (Sep 1999): 179–201.https://doi.org/10.1016/S0031-0182(99)00070-XMitsuo Suzuki The course of resin canals in the shoots of conifers, The Botanical Magazine Tokyo 92, no.44 (Dec 1979): 333–353.https://doi.org/10.1007/BF02506257Mitsuo Suzuki The course of resin canals in the shoots of conifers, The Botanical Magazine Tokyo 92, no.33 (Sep 1979): 235–251.https://doi.org/10.1007/BF02497933