. 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 . jn one or botlisurfaces of the leaf. INFLORESCENCE. The flowers of Taxads and Conifers are always unisexual, and theplants therefore are either monoecious when flowers of both sexesare borne on the same individual, or dioecious when the staminiferous(male) and ovuliferous (female) flowers are borne on differentindividuals. In the , dioecity is probaltly absolute in Ginkgo
. 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 . jn one or botlisurfaces of the leaf. INFLORESCENCE. The flowers of Taxads and Conifers are always unisexual, and theplants therefore are either monoecious when flowers of both sexesare borne on the same individual, or dioecious when the staminiferous(male) and ovuliferous (female) flowers are borne on differentindividuals. In the , dioecity is probaltly absolute in Ginkgoand in two or three of the Australian genera; it is relatively so inTaxus, Cephalotaxus and Torreya, in which flowers of both sexes havebeen observed on the same tree. This is not uncommon in theYew, and when it occurs the two kinds are on different the the flowers are monoecious throughout exceptin Fitzroya, Araucaria and Juniperus, but in the last named genusthe two sexes are often found on different branches of the sametree; and in Araucaria, at least in A. imhrkata, diwcity is notabsolute. The Australian genera Callitris and Actinostrobus are alsoprobably dioecious. 86 Fig. 21. 1, Staminate. 2, Ovulift-ronsflower of the common Yew. The structure <.»f the flowers of Tiixuils and Conifers will be readilyunderstood by reference to the acconi})an}ing fijj,ures, or still better,by coniparnig with them specimens gathered fresh from the trees. The ((1111111(111 Yew affords an easily acccssilJe tyiiu. Tliestaminate fluwers of the Yew, ^ harrafa, are borne in the axils of f nil elongated axis surrounded at tlie byall eiiveldiie of iiiiliricatiiig scales spirallyarranged in tliree (ir fdur series, above wliichis a cajntnluui or head of jieltate scales(stauiiiial leaves) cadi liearing about six (tliree—eiglit) iiolleii sacs which dehisce lengthwisewdieii mature.* The ovuliferous flowers arcsolitary and axillary, but occ
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectconifers, bookyear190
