. Veitch's manual of the coniferae : containing a general review of the order, a synopsis of the species cultivated in Great Britain, their botanical history, economic properties, place and use in arboriculture, etc . )sendo-distichous. It is now wellknown that these positions are taken hy the leaves in order to hrin,^them into tln most advantageous relation to ilin-et sunlight, and thencefor the ohjeet of proniothig their main functions to the greatest l)enefitof the tree, \iz., the assimilation of food stuffs, resjuration, and theexhalation of sn])errtuous water va]ioui-. In connection with
. Veitch's manual of the coniferae : containing a general review of the order, a synopsis of the species cultivated in Great Britain, their botanical history, economic properties, place and use in arboriculture, etc . )sendo-distichous. It is now wellknown that these positions are taken hy the leaves in order to hrin,^them into tln most advantageous relation to ilin-et sunlight, and thencefor the ohjeet of proniothig their main functions to the greatest l)enefitof the tree, \iz., the assimilation of food stuffs, resjuration, and theexhalation of sn])errtuous water va]ioui-. In connection with the same (_ilijects may he mentioned the movementsof the leaves of some Conifers that havi been ol)served during the. Fjl;. 14. Pulvini witli their cicatrices. A, ,-ljuS pectinattt. b, Tsiunf camuhitsis. c, Abictia DoKglusii. D, Pivw ixcej^ E, CedriisLihoiu. F, Lurix europ(eit. a, Laricopsis Kcnnpferi. (From Engler and Praiitls Xaturliclien PHaiizenfamilieii). season of active vegetation, as Ah/es NordinannicDta, P/iui-< halepein^i^and other Pines, notalily those with long filiform leaves as P. ,I. Sfrohus, etc. The leaves of these Iines in winter collapse andhang in (dusters that an ipiite pendulous : Init in summer, especiallyunder the influence of sunlight, they become divergent and even spread-ing. More observations covering a larger range of subjects are, however,wanting before any certain deduction can be drawn from thesemovements. In many of the species included in the Cypress tribe, especially thosein which the branchlets are frond-like, the decussate pairs of scale-Likeleaves are frequently dissimilar, markedly so in , the lateralpairs being larger and free at the ap
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectconifers, bookyear190
