. A dictionary of the flowering plants and ferns. Botany. ZOSTERA 699 Zosima Hoffm. (Zozimia EP.}. Umbelliferae (in. 6). 6 W. As. Zostera Linn. Potainogetonaceae. 6 temp., subarct., subtrop., in salt water on gently sloping shores. Z. marina L. and Z. nana Roth, in Brit, (eel-grass or grass-wrack). The lower part of the stem creeps, rooting as it advances, and has monopodial branching; the branches grow upwards and exhibit sympodial branching, com- plicated by union of axillary shoot to main shoot for some distance. A. Diagram of branching in floral shoot, i—6, successive shoots, every other o
. A dictionary of the flowering plants and ferns. Botany. ZOSTERA 699 Zosima Hoffm. (Zozimia EP.}. Umbelliferae (in. 6). 6 W. As. Zostera Linn. Potainogetonaceae. 6 temp., subarct., subtrop., in salt water on gently sloping shores. Z. marina L. and Z. nana Roth, in Brit, (eel-grass or grass-wrack). The lower part of the stem creeps, rooting as it advances, and has monopodial branching; the branches grow upwards and exhibit sympodial branching, com- plicated by union of axillary shoot to main shoot for some distance. A. Diagram of branching in floral shoot, i—6, successive shoots, every other one being shaded; bl, # on these shoots; s/>, spathes (not indicated in the upper shoots). B. Spathe of Z. nana with flattened spadix taken out; v, the retinaculum; X2. C and D. Half-anther and pistil of same, more enlarged. E. Fruit of Z. marina, the thin pericarp turned back to show the seed, X2j. F. Diagram of a main axis, i, with its fore-leaf (/>') and the axil- lary shoot 2, with its fore-leaf (b-); sp, spathe borne on 2, surrounding the spadix; s, intravaginal scales; v, bracteole. G. Diagram of part of spadix with two flowers ; v, bracteole. A, F, G, after Eichler; B, C, D, from English Botany; E, after Le Maout and Decaisne. above its point of origin. This is most easily seen in the infl. region ; the branching is that of a rhipidium, but shoot i, which springs from the axil of a 1. on shoot i, is adnate to i up to the point at which the first 1. is borne on i; this 1. occupies the angle between the two shoots where they separate. Shoot i (and 2, 3, &c. successively) is pushed aside and bears an infl. (Eichler's Bliithendiag. or Nat. Pft. for details and figs.) L. long, linear, sheathing at Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Willis, J. C. (John Christoph
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1919
