HOW TO KNOW THE SEAWEEDS 



Fucus (No. 73) 22, 104, 133 



edentatus 1 33 



evanescens 1 04 



ves/cu/osus 1 04 

 FURCATE: forked. 



leptophyllus 167 

 linearis 1 67 

 norvegicus 1 67 

 platyphyllus 167 



H 



Ga/oxQuro (No. 87) 124 

 oblongata 1 24 

 marginata 1 24 

 subvert;ci//ata 1 24 



GAMETANGIUM: a sexual 

 organ containing one or 

 more gametes. 



GAMETOPHYTE: in the life 

 history of an alga, the 

 sexual generation which 

 usually consists of sepa- 

 rate male and female 

 plants and which produces 

 motile or non-motile ga- 

 metes. 



Gastroclonium (No. 132) 101 

 coulteri 101 



Gelidium (No. 88) 63, 64, 



176 



cartilagineum 1 76 



crinale 63 

 nudifrons 64 

 papenfussii 1 76 

 polystichum 1 76 

 pulchrum 1 76 

 purpurascens 1 76 



G;'gart/no (No. 125) 147, 

 159, 178 

 canaliculata 178 

 cristata 1 59 

 harveyana 1 47 

 leptorhynchos 178 

 stellata 159 



GLAND CELL: a specialized, 

 non-pigmented cell, usu- 

 ally distinguished from 

 neighboring cells of a tis- 

 sue (in certain Red Al- 

 gae). 



GONIMOBLAST: that portion 

 of the cystocarp which 

 produces the carposporan- 



GON^MOBLAST PLACENTA: 

 in the Gracilariaceae, the 

 subparenchyrhatous cen- 

 tral part of the gonimo- 

 blast mass within the peri- 



Goniohthon (No. 99) 112 

 Gracilaria (No. 119) 24, 42, 



177 



foliifera 1 77 



verrucosa 42 

 Gracilariopsis (No. 120) 41, 



43 



andersonii 43 



sjoestedtii 41. 43 

 Grateloupia (No. 107) 150, 



152, 177, 178, 179 



filicina 150, 179 



maxima 1 52 



schizophylla 150, 152 

 Griffithsia (No. 144) 87 



globulifera 87 



pacifica 87 



tenuis 87 

 Grinnellia (No. 148) 69 



americana 69 

 Gymnogongrus (No. 121) 40, 

 167 



griff ithsine 40, 167 



HAIR: a unicellular or mul- 

 ticellular filament growing 

 from the surface of a 

 thallus. Fig. 250 shows a 

 unicellular hair. 



Figure. 250 



Halicystis (No. 10) 125 



ova lis 1 25 

 Halidrys (No. 78) 106 



dioica 1 06 

 Halimeda (No. 19) 113 



discoidea 1 1 3 

 Halophila 1 80 

 Halosaccion (No. 129) 92 

 97 



glandiforme 92 

 ramentaceum 97 

 Halymenia (No. 108) 151 

 calif arnica 151 

 gelinaria 151 

 HAMATE: sickle-shaped. 

 Haplogloia (No. 40) 44 



andersonii 44 

 HAPLOID: the condition in 

 the life history of an alga 

 in which each cell has 

 the number of chromo- 

 somes characteristic of a 

 gamete. 

 HAPTERON (pi. haptera): a 

 course, usually cylindrical, 

 branched basal organ of 

 attachment. 

 Hedophyllum (No. 58) 143 



sessile 143 

 Helminthocladia (No. 84) 36 



californica 36 

 Herposiphonia (No. 163) 66 



tenella 66 

 Hesperophycus (No. 74) 131 



harveyonus 1 3 1 

 Heterochordaria (No. 41) 45 



abietina 45 

 HETEROMORPHIC (alterna- 

 tion of generations): dis- 

 similar in form and in es- 

 sential structure. 

 Heterosiphonia (No. 158) 48 

 erecta 48 

 gibbesii 48 



Hildenbrandia (No. 97) 8 



prototypus 88 

 Hydroclathrus (No. 48) 88 



clathratus 88 

 Hymenena (No. 152) 134 



flabelligera 1 34 

 Hypnea (No. 116) 60, 61, 62 



cervicornis 62 



cornuta 62 



musciformis 61, 62 



Ilea (No. 49) 148 

 fascia 1 48 



INDETERMINATE BRANCH- 

 ES: branches having no 

 definite limitation on the 

 length to which they may 

 grow. 



INDETERMINATELY: with- 

 out definite limitation of 

 growth. 



INTERCALARY: inserted or 

 occurring between other 

 things or parts; not at 

 the apex or at the base. 



INTERGENICULAR MEDUL- 

 LA: the central, internal 

 tissue of a calcified seg- 

 ment of a jointed coral- 

 line alga. 



Iridophycus (No. 127) 152, 

 153 

 flaccidum 1 53 



ISODIAMETRICAL: of ap- 

 proximately the same di- 

 ameter in all dimensions, 

 such as the large subcor- 

 tical cells in Fig. 251. 



Figure 251 



ISOGAMOUS: having union 

 of gametes which are cf 

 the same size. 



ISOMORPHIC (alternation cf 

 gentrations): similar in 

 external form but not in 

 essential structure. 



Jania (No. 103) 116 

 capillacea 1 16 

 tenella 1 16 



194 



