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Studies in the Lauraceae, V. Some eastern Asiatic species of Beilschmiedia and related genera

1942; Arnold Arboretum of Harvard University; Volume: 23; Linguagem: Inglês

10.5962/bhl.part.18684

2474-3283

Caroline K. Allen,

Plant and animal studies

A LARGE portion of the eastern Asiatic species of Beilschmiedia and Cryptocarya from the herbaria of the Arnold Arboretum, Gray, and New York Botanical Garden has been on loan to Dr. Kostermans for several years.As there is no immediate prospect of its return, it has seemed advisable to gather together such material as is available at present and to attempt to place the mass of Chinese specimens from recent collections.The intention of this paper, therefore, is not to present a complete study of the genera involved but rather to make usable what specimens we have.Originally Beilschmiedia, Cryptocarya and Endiandra only were to be considered, but on detailed study it proved desirable to propose a new combination in Dehaasia and a new genus, Lauromerrillia, Cryptocarya yielded a Chinese representative of the Indian genus Syndiclis.It goes without saying that in all probability some revision will be necessary when type material is available.The following key will separate roughly the genera below.Unfortunately, it is almost always imperative that flowering specimens be at hand.Flower parts in threes or multiple of threes Fertile stamens 9 Leaves subverticillate in clusters at branchlct tips; branchlets conspicuously pale grey; flowers few with perianth lobes often unequal, borne on long slender pedicels; fruit subtended by expanded claviform pedicels Dehaasia.Leaves not subverticillate; branchlets not conspicuously pale grey; flowers numerous with perianth lobes equal or subequal, borne on short pedicels; fruit subtended by pedicels symmetrically enlarged Leaves usually conspicuously reticulate; flowers with perianth tubes absent or very shallow; fruit not costate Beilschmiedia.Leaves usually not reticulate or very minutely so; flowers with perianth tube equalling the lobes in length; fruit conspicuously costate, at least in young stages Cryptocarya, Fertile stamens 6; 6 glands alternate with perianth lobes Lauromerillia.Fertile stamens 3 Endiandra.Flower parts in twos or multiple of twos; fertile stamens 4 Syndiclis,The following letters are used to indicate the institutions in which the numbers cited are to be found: Arnold Arboretum (AA) ; Philippine