XTJII] 



ANATOMY 



137 



M' O 



Fig. 693. A, Abies Veitchii, medullary ray. B, Pinus silvestris, medullary-ray 

 tracheid. C, Abies balsamea, pits and Sanio's rims. T>, E, Pits in medullary -ray 

 cells in Abies homolepis. F, Pits in tangential wall of ray cell of Juniperus 

 virginiana. G, H, K, L, M, N, 0, Pits in medullary-ray cells (radial view) in 

 Cedrus atlantica (G) ; Taxodium distickum (H) ; Podocarpas andina (K) ; P. salici- 

 folia (L) ; Olyptostrobus (M) ; Sciadopitys (N) ; sp, spring wood ; s, summer wood ; 

 Thuya gigantea (0). I, Bars, b, in tracheids of Araucaria brasiliensis. P. Spiral 

 bands in tracheids of Torreya nucifera. (A, N, after Nakamura; B. D — H, 

 K, li, P, after Gothan; C, after Gerry; I, after Winkler; M, after Kraus; 

 O, after PenhaUow.) 



