The Origin of Floral Structures Through Insect and Other AgenciesKegan Paul, Trench, Trübner & Company, Limited, 1888 - 349 pagini |
Din interiorul cărții
Rezultatele 1 - 5 din 24
Pagina 27
... probably so with the two imbricate sepals of Poppies , those of P. orientale being often increased to three , which seems to be a tendency to revert to a more primitive and higher number . With such plants , however , as Circea , the ...
... probably so with the two imbricate sepals of Poppies , those of P. orientale being often increased to three , which seems to be a tendency to revert to a more primitive and higher number . With such plants , however , as Circea , the ...
Pagina 35
... probably , without exception , be divisible into two whorls of three members each , except in the case of symmetrical increase from five . 3 HEPTAMEROUS WHORLS . - Like the number 6 , 7 is a very rare one ; and when present appears to ...
... probably , without exception , be divisible into two whorls of three members each , except in the case of symmetrical increase from five . 3 HEPTAMEROUS WHORLS . - Like the number 6 , 7 is a very rare one ; and when present appears to ...
Pagina 41
... probably due to certain exigencies of nutrition , and especially insect agencies , that such variations of arrangement exist . The important fact mentioned above , that floral whorls are projected cycles and not primitive whorls , has ...
... probably due to certain exigencies of nutrition , and especially insect agencies , that such variations of arrangement exist . The important fact mentioned above , that floral whorls are projected cycles and not primitive whorls , has ...
Pagina 62
... probably a result of degradation through parasitism , from the axile , of the Scrophularineœ . It may be compared to a " cleft palate " and " hare - lip " in man . margins show every degree of union from a mere contact 62 THE STRUCTURE ...
... probably a result of degradation through parasitism , from the axile , of the Scrophularineœ . It may be compared to a " cleft palate " and " hare - lip " in man . margins show every degree of union from a mere contact 62 THE STRUCTURE ...
Pagina 85
... probably due to hyper- trophy through succulency at an early stage , is fasciation . † Under this condition the fibro - vascular cylinder of at least two " axes , " which would be normally separate , coalesce , and form an oval cylinder ...
... probably due to hyper- trophy through succulency at an early stage , is fasciation . † Under this condition the fibro - vascular cylinder of at least two " axes , " which would be normally separate , coalesce , and form an oval cylinder ...
Alte ediții - Afișează-le pe toate
The Origin of Floral Structures Through Insect and Other Agencies George Henslow Vizualizare completă - 1893 |
The Origin of Floral Structures Through Insect and Other Agencies George Henslow Vizualizare completă - 1888 |
Termeni și expresii frecvente
adaptation to insect androecium anemophilous anthers appear arrested atrophy autogamy axial axis bear become bracts calyx capsules carpellary carpels cause cells character chorisis cleistogamous cleistogamous flowers colour condition corolla crossed Darwin degeneracy degradation Demy 8vo diclinism differentiated fact female flowers fertile fertilisation fibro-vascular cords filaments floral whorls florets foliaceous Forms of Flowers Fourth Edition genera genus grains hermaphrodite heterostyled hypertrophy Illustrations insect agency insects intercrossing irregular irritation Journ Labiata latter leaf leaves less long-styled form male flowers marginal mature Müller nature normally observed occur Orchids origin ovary ovules ovuliferous pedicel perianth petaline petals petioles phyllotaxis pistil placentas pollen pollen-tubes Primula produced protandrous protogynous Ranunculus receptacular tube regard remarkable result seedlings seeds seen self-fertilisation self-fertilised plants sepaline sepals short-styled form Small crown 8vo species spiral stamens stigmas structure style superposed temperature Teratology Third Edition tion tissue usually visited weight whorls
Pasaje populare
Pagina 30 - II. Physics and Politics ; or, Thoughts on the Application of the Principles of "Natural Selection " and " Inheritance
Pagina 23 - REYNOLDS, Rev. JW— The Supernatural in Nature. A Verification by Free Use of Science. Third Edition, Revised and Enlarged, Demy 8vo, 14^.
Pagina 30 - XI. Animal Mechanism : a Treatise on Terrestrial and Aerial Locomotion. By Professor EJ Marey. With 117 Illustrations. Third Edition. Crown 8vo, 5^.
Pagina 17 - NEWMAN, JH, DD— Characteristics from the Writings of. Being Selections from his various Works. Arranged with the Author's personal Approval.
Pagina 29 - FIRST BOOK OF BOTANY. Designed to Cultivate the Observing Powers of Children. With 300 Engravings. New and Cheaper Edition. Crown 8vo.
Pagina 11 - HAWEIS, Rev. HR, MA— Current Coin. Materialism— The Devil — Crime — Drunkenness — Pauperism — Emotion — Recreation —The Sabbath.
Pagina 16 - MARKHAM, Capt. Albert Hastings, RN— The Great Frozen Sea : A Personal Narrative of the Voyage of the Alert during the Arctic Expedition of 1875-6.
Pagina 7 - COX, Rev. Sir GW, MA, Bart., and JONES, Eustace Hinton.— Popular Romances of the Middle Ages. Third Edition, in I vol. Crown Svo, 6s.
Pagina 21 - HDM SPENCE. Genesis. By the Rev. T. WHITELAW, MA With Homilies by the Very Rev. JF MONTGOMERY, DD, Rev. Prof. RA REDFORD, MA, LL.B., Rev. F. HASTINGS, Rev. W. ROBERTS, MA An Introduction to the Study of the Old Testament by the Venerable Archdeacon...
Pagina 26 - STRECKER- WISLICENUS.— Organic Chemistry. Translated and Edited, with Extensive Additions, by WR HODGKINSON, Ph.D., and AJ GREENAWAY, FIC Second and cheaper Edition. Demy 8vo, 12s. 6d. Suakin, 1885 ; being a Sketch of the Campaign of this year. By an Officer who was there.