Transactions of The Linnean Society of London. 2nd Series: Botany最新文献_第2页

III. Descriptions of the Specimens.: A. Coniferous Remains 3标本说明。A.针叶遗迹

Transactions of The Linnean Society of London. 2nd Series: Botany Pub Date : 1913-05-01 DOI: 10.1111/J.1095-8339.1913.TB00280.X

Brachyphyllum mamillare

引用次数: 0

XVIII. On Psygmophyllum majus, sp. nov., from the Lower Carboniferous Rocks of Newfoundland, together with a Revision of the Genus and Remarks on its Affinities. 十八。纽芬兰石炭统下石炭统马氏灵(Psygmophyllum majus, sp. nov.)属的修正及其亲缘关系。

Transactions of The Linnean Society of London. 2nd Series: Botany Pub Date : 1912-07-01 DOI: 10.1111/J.1095-8339.1912.TB00147.X

E. Arber

引用次数: 6

XVII. On Botrychioxylon paradoxum, sp. nov., a Palæozoic Fern with Secondary Wood. 第十七章。带次生木的古生代蕨类植物Botrychioxylon paradoxum, sp. nov.的研究。

Transactions of The Linnean Society of London. 2nd Series: Botany Pub Date : 1912-07-01 DOI: 10.1111/J.1095-8339.1912.TB00621.X

D. Scott

引用次数: 6

XVI. Anatomy of Enhalus acoroides (Linn. f.), Zoll. XVI.Enhalus acoroides (Linn. f.), Zoll.

Transactions of The Linnean Society of London. 2nd Series: Botany Pub Date : 1912-02-01 DOI: 10.1111/J.1095-8339.1912.TB00620.X

H. M. Cunnington

引用次数: 8

XV. The Anatomy of Welwitschia mirabilis, Hook. f., in the Seedling and Adult States. Forming Report No. 2 of the Percy Sladen Memorial Expedition to South‐West Africa, 1908‐1909. 十五。《神奇威氏菊解剖》，虎克。f.在苗期和成年期。1908 - 1909年珀西·斯莱登纪念远征西南非洲的第2号形成报告。

Transactions of The Linnean Society of London. 2nd Series: Botany Pub Date : 1910-10-01 DOI: 10.1111/J.1095-8339.1910.TB00146.X

M. Sykes

引用次数: 4

XIV. The Structure and Affinities of Davidia involucrata, Baill. 十四。珙桐属植物的结构与亲缘关系。

Transactions of The Linnean Society of London. 2nd Series: Botany Pub Date : 1909-11-01 DOI: 10.1111/J.1095-8339.1909.TB00145.X

A. S. Horne

{"title":"XIV. The Structure and Affinities of Davidia involucrata, Baill.","authors":"A. S. Horne","doi":"10.1111/J.1095-8339.1909.TB00145.X","DOIUrl":"https://doi.org/10.1111/J.1095-8339.1909.TB00145.X","url":null,"abstract":"Summary. \u0000 \u00001 \u0000The vascular structure of the hypocotyl varies considerably. \u0000 \u00002 \u0000The inflorescence consists of a number of congenitally-fused, apetalous, multi-staminate male flowers: or of male flowers and, in addition, a single obliquely-situated, apetalous hermaphrodite flower with epigynous stamens arranged in series. The arrangement in series is suggested on account of the vascular attachment of as many oppositilocular stamens as there are loculi to the ovarian cylinder of bundles. \u0000 \u00003 \u0000The insertion of the bract-trace takes place above the point of insertion of the bracts themselves, and sometimes as high up as the torus. There are, therefore, three vascular “bundles” on each side of the axial cylinder in the peduncle above the insertion of the bracts. \u0000 \u00004 \u0000The ovules in the multilocular ovary—seven being the mean number of loculi—are attached axially, one in each chamber, and unaccompanied by a rudimentary ovule: correlated with this the vascular bundle in the raphe is made up of two bundles, one from each adjacent septum, joined together, and not of a single bundle from an adjacent placenta, as is frequently the case in the Araliaceae and Umbelliferse. \u0000 \u00005 \u0000The ovule is of the Aralian type, only more specialized, possessing a single, very incomplete integument, which grows up leaving the micropyle on one side or the other. \u0000 \u00006 \u0000The nucellus is of small bulk and comparable to the nucelli of Cornus and Aralia. It does not persist. \u0000 \u00007 \u0000The sporogenous tissue usually gives rise to more than one embryo-sac, of which only one develops to any extent. A number of abnormalities occur in the number, arrangement, and form of the embryo-sac nuclei. The functional embryo-sac of the only fertile ovule observed was perfectly normal. Sterilization processes in the Caprifoliacese are accompanied by abnormal nuclear phenomena in the embryo-sacs of sterile ovules (Symphoricarpus), and by the presence of a multicellular archesporium in the nucelli of incomplete ovules (Viburnum). In the Rubiaceae highly specialized ovules are associated with a multicellular archesporium. Under the circumstances no primitive significance is attached to the condition of the archesporium in Davidia. \u0000 \u00008 \u0000After fertilization time, the tissues of the congenitally-fused integument and raphe (extra-nucellar tissue) differentiate into an inner meristematic zone including the secretory epithelium (internal epidermis), and an outer non-meristematic zone. The expansion of the narrow cylinder of meristem, increasing in size mainly by cell-division in transverse or obliquely transverse planes, causes considerable increase in length over girth during cell-enlargement, and has a dragging effect on the non-meristematic cells, so that previously transverse cortical rows arch downwards as if they had been drawn down toward the axial cylinder, and the seed becomes almond-shaped. The vascular bundle branches considerably; the fine capillaries, which do not penetrate inward, end in the a","PeriodicalId":364930,"journal":{"name":"Transactions of The Linnean Society of London. 2nd Series: Botany","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1909-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116974237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

XIII. The Longitudinal Symmetry of the Centrospermæ. 十三。着丝精子的纵向对称。

Transactions of The Linnean Society of London. 2nd Series: Botany Pub Date : 1909-09-01 DOI: 10.1111/J.1095-8339.1909.TB00144.X

P. Groom

引用次数: 0

XII. A Revision of the Genus Nototriche, Turcz. 十二。标题土耳其赤藓属的订正。

Transactions of The Linnean Society of London. 2nd Series: Botany Pub Date : 1909-07-01 DOI: 10.1111/J.1095-8339.1909.TB00179.X

F. L. Hill

引用次数: 5

XI. The Anatomy of some Sapotaceous Seedlings. 西一些仙人掌属植物幼苗的解剖。

Transactions of The Linnean Society of London. 2nd Series: Botany Pub Date : 1909-02-01 DOI: 10.1111/J.1095-8339.1909.TB00143.X

Winifred Smith

{"title":"XI. The Anatomy of some Sapotaceous Seedlings.","authors":"Winifred Smith","doi":"10.1111/J.1095-8339.1909.TB00143.X","DOIUrl":"https://doi.org/10.1111/J.1095-8339.1909.TB00143.X","url":null,"abstract":"Summary \u0000 \u00001 \u0000A swollen zone in the hypocotyl, corresponding with a band of secondary thickening, or with lignification of the pith, or with both, is seen in ten out of the fourteen species examined. Phloem is well developed. Other geophilous features are prominent in Bumelia tenax. \u0000 \u00002 \u0000The vascular system of primary root and hypocotyl is typically tetrarch and corresponds with two bundles from each cotyledon without change of position. In Mimusops Schimperi, however, there is a hexarch root, and Bumelia tenax and two species of Palaquium are variable and anomalous, tending to be hexarch. The occurrence of the hexarch type might lead one to suspect that a central cotyledonary trace had aborted in the tetrarch type, as described in some species of Diospyros by Mr. Herbert Wright*. But in the tetrarch types of which I had seeds I could not discover, even in the embryo, any sign of lignification in the position of a central trace. The midrib of the cotyledon was formed as indicated in Pl. 26. fig. 10. The primary vascular bundles lie typically parallel to the cotyledonary plane, but are not intersected by it. \u0000 \u00003 \u0000Vasculsr system of the cotyledons:—The first differentiation of xylem is seen at the tip of the cotyledon and progresses downwards through the node. The two strands of metaxylem belonging to each double vascular bundle remain separate and are seen halfway between the cotyledonary node and the root-apex to be placed each side of the xylem of the primary root-strand. Protoxylem-strands of the cotyledon, if double above, fuse at the node and occupy a median position. In Bumelia tenax the protoxylem strands of the cotyledon are single and occupy a median position between the members of a double group of metaxylem. They are completely isolated by parenchyma in Payena Leerii, Bumelia tenax, and Chrysophyllum Cainito. \u0000 \u00004 \u0000Root system:—Lignification progresses from the node downwards, dying out gradually near the root-apex. The continuity of the protoxylem is sometimes interrupted for short distances, probably owing to stretching during growth. \u0000 \u00005 \u0000Stem system:—Differentiation of xylem begins at the node and progresses downwards. In Bumelia tenax there is marked lack of continuity. The small spiral and annular tracheids belonging to the traces of the first internode do not reach to the node. This break is perhaps only an exaggeration of what is seen in the protoxylems of the root and to be accounted for by the rapid elongation of the shoot (see Bumelia tenax, fig. 11 b,). As in Diospyros the foliar traces fork and spread out at the node in this species, and are represented by a reduced number of bundles above and below the node. \u0000 \u00006 \u0000Accessory system of the root:—In Bumelia tenux we meet with a number of strands not primary, which I have called the accessory system of the root. The strands which constitute this system do not correspond in number and position with the foliar traces which appear at the node. \u0000 \u0000 \u0000 \u0000 \u0000 \u0000At the stages of devel","PeriodicalId":364930,"journal":{"name":"Transactions of The Linnean Society of London. 2nd Series: Botany","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1909-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128662872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

X. Marine Algæ (Chlorophyceæ and Phæophyceæ) and Marine Phanerogams of the ‘Sealark’ Expedition, collected by J. Stanley Gardiner, M.A., F.R.S., F.L.S.

Transactions of The Linnean Society of London. 2nd Series: Botany Pub Date : 1908-12-01 DOI: 10.1111/J.1095-8339.1908.TB00618.X

F. M.A., E. Gepp

引用次数: 11