Recueil des travaux botaniques néerlandais . 279 marked from the lange elongated ones of the the level of séparation of the stony coat and the endotesta, the latter be-comes free from the in its turn points withits sharp apical portion intothe cavity formed by theinnermost layer. In this waythree cavities are formed oneabove the other, respecti-vely by the cupule, thesclerotesta and the endotesta,and into which are pointingby turns the micropylar beakof the stony coat, that ofthe inner fleshy layer andthe top of the nucellus. Thusthe micropylar tube may b
Recueil des travaux botaniques néerlandais . 279 marked from the lange elongated ones of the the level of séparation of the stony coat and the endotesta, the latter be-comes free from the in its turn points withits sharp apical portion intothe cavity formed by theinnermost layer. In this waythree cavities are formed oneabove the other, respecti-vely by the cupule, thesclerotesta and the endotesta,and into which are pointingby turns the micropylar beakof the stony coat, that ofthe inner fleshy layer andthe top of the nucellus. Thusthe micropylar tube may becompared to three funnels,other with their narrowest opening. ,^..7fM£ Fig. 9. Torreya nucifera ; partof longitudinal section through theovule to indicate the places wherea cuticula was found; 1, 2 and 5 véry distinct cuticulae,lining the arillus. integument andnucellus 3. cuticulae very faint, 4no cuticula, 3 and 4 place of sépa-ration of sclerotesta and endotesta. shoved one on theturned upwards. To distinguish the limits of the différent layers, I usedthe cuticula reaction of van Wisselingh (171) alreadydescribed for Cephalotaxus. A very peculiar behaviour, characteristic of what wc may call the ..rumination of the nucellus, avery irregular invasion of the endotesta by the nucellartissue. For a more detailed treatment of this progress, Imay refer to (52) or (53). At the base of the seed two vascular bundles enter thearillus. running upwards close to the woody orientation of xylem and phloem is normal, the xylemlying at the innerside, the phloem outside. They oftendivide but then the différent branches always reu
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplants, bookyear1904
