Water Plants: A Study of Aquatic Angiosperms |
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aerenchyma aerial air leaves Aldrovandia Alisma Plantago Alismaceae anatomy Angiosperms apical Arber Ascherson axis belonging bladders buds bundles Callitriche Castalia cells Ceratophyllum Chapter connexion Cymodocea Dicotyledons Elodea entirely submerged epidermis female flowers floating leaves Flora fronds fruit genera genus germination Glück Goebel growing Guppy Hegelmaier Helobieae heterophylly Hippuris vulgaris Hydrocharis Morsus-ranae Hydrocharitaceae hydrophytes inflorescence instance internodes Irmisch Jahrg lamina land form land plants Lemna Lemnaceae Limnanthemum Littorella Monocotyledons morphology Myriophyllum Naias Nymphaea lutea Nymphaeaceae observed occur organs petiole Pistia Podostemaceae pollination Potamogeton natans Potamogetonaceae present writer produced Ranunculus region rhizome Sagittaria sagittifolia Sauvageau Schenck seedling seeds shoots species stele stem stolons stomates structure submerged leaves submerged plants surface terrestrial plants text-figs tissue tuber turions type of leaf Ueber Utricularia minor Utricularia vulgaris vascular vegetative water plants Waterlilies Willis winter winter-buds xylem Zannichellia Zostera
Popular passages
Page 108 - Plantarum,' where a very excellent figure of it is given ; like most of its congeners, it is aquatic, but what is most curious is that it is only to be found growing in the water which collects in the bottom of the leaves of a large Tillandsia, that inhabits abundantly an arid rocky part of the mountain, at an elevation of about 5000 feet above the level of the sea.
Page 379 - The Botany of the Roraima Expedition of 1884: being Notes on the Plants observed, by Everard F. im Thurn; with a list of the Species collected, and Determinations of those that are new, by Prof.
Page v - Naturally we turn aside from generalities. It is no time to discuss the origin of the Mollusca or of Dicotyledons, while we are not even sure how it came to pass that Primula obconica has in twenty-five years produced its abundant new forms almost under our eyes.
Page 161 - ... Melilotus and Trifolium. They noticed in Melilotus Taurica that leaves arising from young shoots, produced on plants which had 'been cut down and kept in pots during the winter in a greenhouse, slept like those of Trifolium, with the central leaflet simply bent upwards, while the leaves on the fully grown branches of the same plant afterwards slept according to the normal Melilotus method, in which the terminal leaflet rotates at night so as to present one lateral edge to the zenith. They suggest...
Page 328 - JC (1902), (I9H1), and (1915*). regards as forced upon them, so to speak, by that of the vegetative organs, "without any reference to advantages or disadvantages to be derived from it in the performance of the functions of the floral organs themselves1.
Page 109 - This runner is always found directing itself towards the nearest Tillandsia, when it inserts its point into the water and gives origin to a new plant, which, in its turn, sends out another shoot ; in this manner I have seen not less than six plants united.
Page 160 - ... land" type of leaf — the transition from the "water" to the "land" type taking place earlier on strongly growing than on weak stems. The author considers it evident that the aquatic environment is not the cause of the division of the leaf, nor does it depend on light, temperature, gaseous content of the water or contact stimulus. The only conclusion which he holds to be justified by his experiments is that Proserpinaca palustris has two forms, an adult form and a juvenile form ; under good...
Page vi - It is my pleasure to thank many people who have helped me in various ways during the preparation of this book.
Page 298 - ... on removal from the water, collapse and cling closely to any object they may touch.
Page 335 - ... Evenwel, heeft Dr. AGNES ARBER in haar nieuw en bewonderenswaardig boek over waterplanten, er op gewezen dat volgens iedere evolutie-theorie „what organisms have gained in specialisation they have lost in plasticity". Zij gebruikt daarbij eene aan den mensch ontleende analogie en zegt: „The man, thoug superior to the baby in actual achievement, is inferior to it in the qualities which may be summed up in the word „promise...