HOW TO KNOW THE SEAWEEDS 



Laminaria (No. 59) 22, 144, 



146 



agardhii 1 46 



digitata 1 44 



faeroensis 1 46 

 Laurencia (No. 160) 55, 58, 



171 



diegoensis 1 7 1 



obtusa 58 



pacifica 59 



papulosa 58 



spectabilis 1 7 1 



splendens 1 7 1 

 Leathesia (No. 37) 91 



difformis 91 

 Leptocladia (No. 94) 174 



binghamiae 1 74 

 Lesson/'ops/'s (No. 63) 130 



littoralis 1 30 

 Liagora (No. 85) 124 



californica 1 24 



ceranoides 1 24 

 LIGULATE: strap-shaped. 

 Lithophyllum (No. 100) 112 

 Lithothamnium (No. 98 111, 



112 



giganteum 1 1 1 

 Lithothrix (No. 105) 117 



aspergillum 1 1 7 

 Lomentaria (No. 134) 99 



baileyana 99 

 Lophosiphonia (No. 164) 53 



M 



MULTIZONAL: consisting of 

 more than one zone or 

 tier of cells. 



Myr/ogromme (No. 150) 71 

 spectabilis 7 1 



N 



Nemalion (No. 82) 35 

 helminthoides 35 

 multifidum 35 



NEMATHECIUM: a special- 

 ized form of tetrcsporan- 

 gial sorus which is usually 

 somewhat elevated above 

 the surface and in which 

 the cortex is modified to 

 produce elongated cells or 

 rows of cells (paraphyses) 

 among which the tetra- 

 sporangia are borne (Fig. 

 252). Usage is restricted 

 to the Florideae. 



Macrocystis (No. 64) 108 

 integrifolia 1 08 

 pyrifera 1 08 



MACROSPORANGIUM: the 

 sporangium producing the 

 larger of two dissimilar 

 sized spores, as in Pel- 

 vet ia. 



MEDULLA: the central tis- 

 sue of the thallus beneath 

 the cortex and usually of 

 non-pigmented cells. 



MEDULLARY: pertaining to 

 the medulla. 



MEMBRANOUS: thin and 

 flat, like a membrane. 



MERISTEM: a tissue of a 

 point or region in which 

 growth is initiated. 



Microcladia (No. 147) 64 

 borealis 64 

 californica 64 

 coulteri 64 



MIDRIB: a vein- or rib-like 

 structure running up the 

 middle of a blade. 



MONILIFORM: in the form 

 of a string of beads. 



MONOPODIAL: a method of 

 branching in which a main 

 axis produces lateral 

 branches subordinate to 

 itself. 



Monostroma (No. 2) 71. 



MONOSTROMATIC: consist- 

 ing of only one layer of 

 cells. 



MULTIFARIOUS: in many 

 planes (branching). 



MULTISERIATE: of several 

 or more rows or series of 

 cells. 



Figure 252 



121 



102 



Neomeris (No. 26) 

 annulata 121 



Nereocystis (No. 65) 

 luetkeana 1 02 



Nienburgia (No. 156) 140 

 andersoniana 1 40 

 borealis 1 40 



NODES: the rings formed by 

 the junction of each suc- 

 cessive axial cell with the 

 next (as in CaUithamnion 

 and Wrangelia). 



Odonthalia (No. 168) 170 

 floccosa 1 70 



Opuntiella (No. 115) 157 

 californica 1 57 



OSTIOLE: the^pore-like aper- 

 ture of a pericarp or of 

 a conceptacle. 



PALMATE: diverging in the 

 manner of the fingers 

 from the palm of the 

 hand. 



Pachydictyon (No. 33) 162 

 coriaceum 1 62 



Padina (No. 34) 120 

 sanctae-crucis 1 20 

 vickersiae 1 20 



PAPILLAE: nipple-like out- 

 growths from the surface 

 of a thallus. 



PARAPHYSIS (pi. -SES): a 

 sterile filament produced 

 adjacent to or in con- 

 nection with the develop- 

 ment of a reproductive 

 organ. 



PARENCHYMATOUS: a tis- 

 sue in which the cells are 

 relatively large, thin- 

 walled and more or less 

 isodiametrical. 



PARIETAL: borne against 

 the cell wall on the in- 

 side of the cell. 



Pelagophycus (No. 66) 102 

 porra 1 02 



Pelvetia (No. 75) 158, 159 

 fastigiata 158, 159 



Pelvetiopsis (No. 76) 158 

 limitata 158 



Penicillus (No. 21) 122 

 capitatus 1 22 



PERCURRENT: running 

 through to the end (as a 

 vein or midrib in a blade. 

 Fig. 253); extending 

 throughout the length (as 

 an axis of a thallus). 



Figure 253 



PERICARP: the sterile, en- 

 veloping wall surrounding 



the gonimoblast in certain 



red algae. 

 Petalonia, see Ilea (No. 49) 



148 

 Petrospongium (No. 38) 90 



rugosum 90 

 Peysonnelia (No. 96) 89 

 Phycodrys (No. 149) 69 



rubens 69 



setchellii 69 

 Phyllaria (No. 60) 146 



dermatodea 1 46 

 P'hyllophora (No. 123) 168 



brodiaei 1 68 



clevelandii 1 68 



membranifolia 168 

 Phyllospadix 1 82 



scouleri 1 82 



torreyi 182 



195 



